[{"oa_version":"Published Version","abstract":[{"lang":"eng","text":"Embroidery is a long-standing and high-quality approach to making logos and images on textiles. Nowadays, it can also be performed via automated machines that weave threads with high spatial accuracy. A characteristic feature of the appearance of the threads is a high degree of anisotropy. The anisotropic behavior is caused by depositing thin but long strings of thread. As a result, the stitched patterns convey both color and direction. Artists leverage this anisotropic behavior to enhance pure color images with textures, illusions of motion, or depth cues. However, designing colorful embroidery patterns with prescribed directionality is a challenging task, one usually requiring an expert designer. In this work, we propose an interactive algorithm that generates machine-fabricable embroidery patterns from multi-chromatic images equipped with user-specified directionality fields.We cast the problem of finding a stitching pattern into vector theory. To find a suitable stitching pattern, we extract sources and sinks from the divergence field of the vector field extracted from the input and use them to trace streamlines. We further optimize the streamlines to guarantee a smooth and connected stitching pattern. The generated patterns approximate the color distribution constrained by the directionality field. To allow for further artistic control, the trade-off between color match and directionality match can be interactively explored via an intuitive slider. We showcase our approach by fabricating several embroidery paths."}],"month":"05","intvolume":" 42","file":[{"content_type":"application/pdf","access_level":"open_access","relation":"main_file","checksum":"4c188c2be4745467a8790bbf5d6491aa","file_id":"12974","success":1,"date_updated":"2023-05-16T08:28:37Z","file_size":24003702,"creator":"mpiovarc","date_created":"2023-05-16T08:28:37Z","file_name":"Zhenyuan2023.pdf"}],"language":[{"iso":"eng"}],"publication_identifier":{"issn":["1467-8659"]},"publication_status":"published","issue":"2","volume":42,"ec_funded":1,"license":"https://creativecommons.org/licenses/by-nc-nd/4.0/","_id":"12972","status":"public","keyword":["embroidery","design","directionality","density","image"],"article_type":"original","type":"journal_article","tmp":{"short":"CC BY-NC-ND (4.0)","name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode","image":"/images/cc_by_nc_nd.png"},"conference":{"name":"EG: Eurographics","location":"Saarbrucken, Germany","end_date":"2023-05-12","start_date":"2023-05-08"},"ddc":["004"],"date_updated":"2023-08-01T14:47:05Z","department":[{"_id":"BeBi"}],"file_date_updated":"2023-05-16T08:28:37Z","acknowledgement":"This work was supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No 715767 – MATERIALIZABLE), and FWF Lise Meitner (Grant M 3319). We thank the anonymous reviewers for their insightful feedback; Solal Pirelli, Shardul Chiplunkar, and Paola Mejia for proofreading; everyone in the visual computing group at ISTA for inspiring lunch and coffee breaks; Thibault Tricard for help producing the results of Phasor Noise.","quality_controlled":"1","publisher":"Wiley","oa":1,"day":"08","publication":"Computer Graphics Forum","isi":1,"has_accepted_license":"1","year":"2023","date_published":"2023-05-08T00:00:00Z","doi":"10.1111/cgf.14770 ","date_created":"2023-05-16T08:47:25Z","page":"397-409","project":[{"_id":"eb901961-77a9-11ec-83b8-f5c883a62027","name":"Perception-Aware Appearance Fabrication","grant_number":"M03319"},{"_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"chicago":"Liu, Zhenyuan, Michael Piovarci, Christian Hafner, Raphael Charrondiere, and Bernd Bickel. “Directionality-Aware Design of Embroidery Patterns.” Computer Graphics Forum. Wiley, 2023. https://doi.org/10.1111/cgf.14770 .","ista":"Liu Z, Piovarci M, Hafner C, Charrondiere R, Bickel B. 2023. Directionality-aware design of embroidery patterns. Computer Graphics Forum. 42(2), 397–409.","mla":"Liu, Zhenyuan, et al. “Directionality-Aware Design of Embroidery Patterns.” Computer Graphics Forum, vol. 42, no. 2, Wiley, 2023, pp. 397–409, doi:10.1111/cgf.14770 .","apa":"Liu, Z., Piovarci, M., Hafner, C., Charrondiere, R., & Bickel, B. (2023). Directionality-aware design of embroidery patterns. Computer Graphics Forum. Saarbrucken, Germany: Wiley. https://doi.org/10.1111/cgf.14770 ","ama":"Liu Z, Piovarci M, Hafner C, Charrondiere R, Bickel B. Directionality-aware design of embroidery patterns. Computer Graphics Forum. 2023;42(2):397-409. doi:10.1111/cgf.14770 ","short":"Z. Liu, M. Piovarci, C. Hafner, R. Charrondiere, B. Bickel, Computer Graphics Forum 42 (2023) 397–409.","ieee":"Z. Liu, M. Piovarci, C. Hafner, R. Charrondiere, and B. Bickel, “Directionality-aware design of embroidery patterns,” Computer Graphics Forum, vol. 42, no. 2. Wiley, pp. 397–409, 2023."},"title":"Directionality-aware design of embroidery patterns","author":[{"last_name":"Liu","full_name":"Liu, Zhenyuan","orcid":"0000-0001-9200-5690","id":"70f0d7cf-ae65-11ec-a14f-89dfc5505b19","first_name":"Zhenyuan"},{"first_name":"Michael","id":"62E473F4-5C99-11EA-A40E-AF823DDC885E","last_name":"Piovarci","full_name":"Piovarci, Michael"},{"last_name":"Hafner","full_name":"Hafner, Christian","first_name":"Christian","id":"400429CC-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Charrondiere","full_name":"Charrondiere, Raphael","first_name":"Raphael","id":"a3a24133-2cc7-11ec-be88-8ddaf6f464b1"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd"}],"external_id":{"isi":["001000062600033"]},"article_processing_charge":"No"},{"publication":"SIGGRAPH 2023 Conference Proceedings","day":"23","year":"2023","date_created":"2023-08-27T22:01:17Z","doi":"10.1145/3588432.3591542","date_published":"2023-07-23T00:00:00Z","acknowledgement":"The authors would like to thank Yuki Koyama and Takeo Igarashi for early discussions, and Yuta Yaguchi for support in 3D printing. This research is partially supported by the Israel Science Foundation grant number 1390/19.\r\n","oa":1,"publisher":"Association for Computing Machinery","quality_controlled":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"ama":"Tojo K, Shamir A, Bickel B, Umetani N. Stealth shaper: Reflectivity optimization as surface stylization. In: SIGGRAPH 2023 Conference Proceedings. Association for Computing Machinery; 2023. doi:10.1145/3588432.3591542","apa":"Tojo, K., Shamir, A., Bickel, B., & Umetani, N. (2023). Stealth shaper: Reflectivity optimization as surface stylization. In SIGGRAPH 2023 Conference Proceedings. Los Angeles, CA, United States: Association for Computing Machinery. https://doi.org/10.1145/3588432.3591542","short":"K. Tojo, A. Shamir, B. Bickel, N. Umetani, in:, SIGGRAPH 2023 Conference Proceedings, Association for Computing Machinery, 2023.","ieee":"K. Tojo, A. Shamir, B. Bickel, and N. Umetani, “Stealth shaper: Reflectivity optimization as surface stylization,” in SIGGRAPH 2023 Conference Proceedings, Los Angeles, CA, United States, 2023.","mla":"Tojo, Kenji, et al. “Stealth Shaper: Reflectivity Optimization as Surface Stylization.” SIGGRAPH 2023 Conference Proceedings, 20, Association for Computing Machinery, 2023, doi:10.1145/3588432.3591542.","ista":"Tojo K, Shamir A, Bickel B, Umetani N. 2023. Stealth shaper: Reflectivity optimization as surface stylization. SIGGRAPH 2023 Conference Proceedings. SIGGRAPH: Computer Graphics and Interactive Techniques Conference, 20.","chicago":"Tojo, Kenji, Ariel Shamir, Bernd Bickel, and Nobuyuki Umetani. “Stealth Shaper: Reflectivity Optimization as Surface Stylization.” In SIGGRAPH 2023 Conference Proceedings. Association for Computing Machinery, 2023. https://doi.org/10.1145/3588432.3591542."},"title":"Stealth shaper: Reflectivity optimization as surface stylization","external_id":{"arxiv":["2305.05944"]},"article_processing_charge":"No","author":[{"first_name":"Kenji","full_name":"Tojo, Kenji","last_name":"Tojo"},{"first_name":"Ariel","full_name":"Shamir, Ariel","last_name":"Shamir"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385"},{"first_name":"Nobuyuki","last_name":"Umetani","full_name":"Umetani, Nobuyuki"}],"article_number":"20","language":[{"iso":"eng"}],"publication_status":"published","publication_identifier":{"isbn":["9798400701597"]},"oa_version":"Preprint","abstract":[{"text":"We present a technique to optimize the reflectivity of a surface while preserving its overall shape. The naïve optimization of the mesh vertices using the gradients of reflectivity simulations results in undesirable distortion. In contrast, our robust formulation optimizes the surface normal as an independent variable that bridges the reflectivity term with differential rendering, and the regularization term with as-rigid-as-possible elastic energy. We further adaptively subdivide the input mesh to improve the convergence. Consequently, our method can minimize the retroreflectivity of a wide range of input shapes, resulting in sharply creased shapes ubiquitous among stealth aircraft and Sci-Fi vehicles. Furthermore, by changing the reward for the direction of the outgoing light directions, our method can be applied to other reflectivity design tasks, such as the optimization of architectural walls to concentrate light in a specific region. We have tested the proposed method using light-transport simulations and real-world 3D-printed objects.","lang":"eng"}],"month":"07","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2305.05944","open_access":"1"}],"scopus_import":"1","date_updated":"2023-09-05T07:22:03Z","department":[{"_id":"BeBi"}],"_id":"14241","status":"public","conference":{"name":"SIGGRAPH: Computer Graphics and Interactive Techniques Conference","start_date":"2023-08-06","location":"Los Angeles, CA, United States","end_date":"2023-08-10"},"type":"conference"},{"date_published":"2023-10-31T00:00:00Z","doi":"10.1007/s11263-023-01899-3","date_created":"2023-11-05T23:00:54Z","day":"31","publication":"International Journal of Computer Vision","language":[{"iso":"eng"}],"publication_identifier":{"eissn":["1573-1405"],"issn":["0920-5691"]},"year":"2023","publication_status":"epub_ahead","month":"10","scopus_import":"1","publisher":"Springer Nature","quality_controlled":"1","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1007/s11263-023-01899-3"}],"oa":1,"oa_version":"Published Version","acknowledgement":"Open Access funding enabled and organized by Projekt DEAL.","abstract":[{"text":"Portrait viewpoint and illumination editing is an important problem with several applications in VR/AR, movies, and photography. Comprehensive knowledge of geometry and illumination is critical for obtaining photorealistic results. Current methods are unable to explicitly model in 3D while handling both viewpoint and illumination editing from a single image. In this paper, we propose VoRF, a novel approach that can take even a single portrait image as input and relight human heads under novel illuminations that can be viewed from arbitrary viewpoints. VoRF represents a human head as a continuous volumetric field and learns a prior model of human heads using a coordinate-based MLP with individual latent spaces for identity and illumination. The prior model is learned in an auto-decoder manner over a diverse class of head shapes and appearances, allowing VoRF to generalize to novel test identities from a single input image. Additionally, VoRF has a reflectance MLP that uses the intermediate features of the prior model for rendering One-Light-at-A-Time (OLAT) images under novel views. We synthesize novel illuminations by combining these OLAT images with target environment maps. Qualitative and quantitative evaluations demonstrate the effectiveness of VoRF for relighting and novel view synthesis, even when applied to unseen subjects under uncontrolled illumination. This work is an extension of Rao et al. (VoRF: Volumetric Relightable Faces 2022). We provide extensive evaluation and ablative studies of our model and also provide an application, where any face can be relighted using textual input.","lang":"eng"}],"department":[{"_id":"BeBi"}],"title":"A deeper analysis of volumetric relightiable faces","author":[{"first_name":"Pramod","last_name":"Rao","full_name":"Rao, Pramod"},{"last_name":"Mallikarjun","full_name":"Mallikarjun, B. R.","first_name":"B. R."},{"first_name":"Gereon","last_name":"Fox","full_name":"Fox, Gereon"},{"first_name":"Tim","last_name":"Weyrich","full_name":"Weyrich, Tim"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385"},{"full_name":"Pfister, Hanspeter","last_name":"Pfister","first_name":"Hanspeter"},{"full_name":"Matusik, Wojciech","last_name":"Matusik","first_name":"Wojciech"},{"last_name":"Zhan","full_name":"Zhan, Fangneng","first_name":"Fangneng"},{"first_name":"Ayush","last_name":"Tewari","full_name":"Tewari, Ayush"},{"full_name":"Theobalt, Christian","last_name":"Theobalt","first_name":"Christian"},{"first_name":"Mohamed","last_name":"Elgharib","full_name":"Elgharib, Mohamed"}],"article_processing_charge":"Yes (via OA deal)","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"mla":"Rao, Pramod, et al. “A Deeper Analysis of Volumetric Relightiable Faces.” International Journal of Computer Vision, Springer Nature, 2023, doi:10.1007/s11263-023-01899-3.","apa":"Rao, P., Mallikarjun, B. R., Fox, G., Weyrich, T., Bickel, B., Pfister, H., … Elgharib, M. (2023). A deeper analysis of volumetric relightiable faces. International Journal of Computer Vision. Springer Nature. https://doi.org/10.1007/s11263-023-01899-3","ama":"Rao P, Mallikarjun BR, Fox G, et al. A deeper analysis of volumetric relightiable faces. International Journal of Computer Vision. 2023. doi:10.1007/s11263-023-01899-3","ieee":"P. Rao et al., “A deeper analysis of volumetric relightiable faces,” International Journal of Computer Vision. Springer Nature, 2023.","short":"P. Rao, B.R. Mallikarjun, G. Fox, T. Weyrich, B. Bickel, H. Pfister, W. Matusik, F. Zhan, A. Tewari, C. Theobalt, M. Elgharib, International Journal of Computer Vision (2023).","chicago":"Rao, Pramod, B. R. Mallikarjun, Gereon Fox, Tim Weyrich, Bernd Bickel, Hanspeter Pfister, Wojciech Matusik, et al. “A Deeper Analysis of Volumetric Relightiable Faces.” International Journal of Computer Vision. Springer Nature, 2023. https://doi.org/10.1007/s11263-023-01899-3.","ista":"Rao P, Mallikarjun BR, Fox G, Weyrich T, Bickel B, Pfister H, Matusik W, Zhan F, Tewari A, Theobalt C, Elgharib M. 2023. A deeper analysis of volumetric relightiable faces. International Journal of Computer Vision."},"date_updated":"2023-11-06T08:52:30Z","status":"public","article_type":"original","type":"journal_article","_id":"14488"},{"abstract":[{"text":"We introduce a compact, intuitive procedural graph representation for cellular metamaterials, which are small-scale, tileable structures that can be architected to exhibit many useful material properties. Because the structures’ “architectures” vary widely—with elements such as beams, thin shells, and solid bulks—it is difficult to explore them using existing representations. Generic approaches like voxel grids are versatile, but it is cumbersome to represent and edit individual structures; architecture-specific approaches address these issues, but are incompatible with one another. By contrast, our procedural graph succinctly represents the construction process for any structure using a simple skeleton annotated with spatially varying thickness. To express the highly constrained triply periodic minimal surfaces (TPMS) in this manner, we present the first fully automated version of the conjugate surface construction method, which allows novices to create complex TPMS from intuitive input. We demonstrate our representation’s expressiveness, accuracy, and compactness by constructing a wide range of established structures and hundreds of novel structures with diverse architectures and material properties. We also conduct a user study to verify our representation’s ease-of-use and ability to expand engineers’ capacity for exploration.","lang":"eng"}],"oa_version":"Published Version","intvolume":" 42","month":"10","publication_status":"published","publication_identifier":{"issn":["0730-0301","1557-7368"]},"language":[{"iso":"eng"}],"file":[{"date_updated":"2023-11-29T15:16:01Z","file_size":95467870,"creator":"yichen","date_created":"2023-11-29T15:16:01Z","file_name":"tog-22-0089-File004.zip","content_type":"application/zip","access_level":"open_access","relation":"main_file","file_id":"14630","checksum":"0192f597d7a2ceaf89baddfd6190d4c8","success":1},{"checksum":"7fb024963be81933494f38de191e4710","file_id":"14631","success":1,"content_type":"application/zip","access_level":"open_access","relation":"main_file","date_created":"2023-11-29T15:16:01Z","file_name":"tog-22-0089-File005.zip","date_updated":"2023-11-29T15:16:01Z","file_size":103731880,"creator":"yichen"},{"access_level":"open_access","relation":"main_file","content_type":"application/pdf","checksum":"b7d6829ce396e21cac9fae0ec7130a6b","file_id":"14638","success":1,"creator":"dernst","date_updated":"2023-12-04T08:04:14Z","file_size":57067476,"date_created":"2023-12-04T08:04:14Z","file_name":"2023_ACMToG_Makatura.pdf"}],"volume":42,"issue":"5","_id":"14628","article_type":"original","type":"journal_article","keyword":["Computer Graphics and Computer-Aided Design"],"status":"public","date_updated":"2023-12-04T08:09:05Z","ddc":["531","006"],"department":[{"_id":"GradSch"},{"_id":"ChWo"},{"_id":"BeBi"}],"file_date_updated":"2023-12-04T08:04:14Z","acknowledgement":"The authors thank Mina Konaković Luković and Michael Foshey for their early contributions to this project, David Palmer and Paul Zhang for their insightful discussions about minimal surfaces and the CSCM, Julian Panetta for providing the Elastic Textures code, and Hannes Hergeth for his feedback and support. We also thank our user study participants and anonymous reviewers.\r\nThis material is based upon work supported by the National Science Foundation\r\n(NSF) Graduate Research Fellowship under Grant No. 2141064; the MIT Morningside\r\nAcademy for Design Fellowship; the Defense Advanced Research Projects Agency\r\n(DARPA) Grant No. FA8750-20-C-0075; the ERC Consolidator Grant No. 101045083,\r\n“CoDiNA: Computational Discovery of Numerical Algorithms for Animation and Simulation of Natural Phenomena”; and the NewSat project, which is co-funded by the Operational Program for Competitiveness and Internationalisation (COMPETE2020), Portugal 2020, the European Regional Development Fund (ERDF), and the Portuguese Foundation for Science and Technology (FTC) under the MIT Portugal program.","oa":1,"publisher":"Association for Computing Machinery","quality_controlled":"1","year":"2023","has_accepted_license":"1","publication":"ACM Transactions on Graphics","day":"01","date_created":"2023-11-29T15:02:03Z","date_published":"2023-10-01T00:00:00Z","doi":"10.1145/3605389","article_number":"168","project":[{"name":"Computational Discovery of Numerical Algorithms for Animation and Simulation of Natural Phenomena","grant_number":"101045083","_id":"34bc2376-11ca-11ed-8bc3-9a3b3961a088"}],"citation":{"ama":"Makatura L, Wang B, Chen Y-L, et al. Procedural metamaterials: A unified procedural graph for metamaterial design. ACM Transactions on Graphics. 2023;42(5). doi:10.1145/3605389","apa":"Makatura, L., Wang, B., Chen, Y.-L., Deng, B., Wojtan, C., Bickel, B., & Matusik, W. (2023). Procedural metamaterials: A unified procedural graph for metamaterial design. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3605389","short":"L. Makatura, B. Wang, Y.-L. Chen, B. Deng, C. Wojtan, B. Bickel, W. Matusik, ACM Transactions on Graphics 42 (2023).","ieee":"L. Makatura et al., “Procedural metamaterials: A unified procedural graph for metamaterial design,” ACM Transactions on Graphics, vol. 42, no. 5. Association for Computing Machinery, 2023.","mla":"Makatura, Liane, et al. “Procedural Metamaterials: A Unified Procedural Graph for Metamaterial Design.” ACM Transactions on Graphics, vol. 42, no. 5, 168, Association for Computing Machinery, 2023, doi:10.1145/3605389.","ista":"Makatura L, Wang B, Chen Y-L, Deng B, Wojtan C, Bickel B, Matusik W. 2023. Procedural metamaterials: A unified procedural graph for metamaterial design. ACM Transactions on Graphics. 42(5), 168.","chicago":"Makatura, Liane, Bohan Wang, Yi-Lu Chen, Bolei Deng, Chris Wojtan, Bernd Bickel, and Wojciech Matusik. “Procedural Metamaterials: A Unified Procedural Graph for Metamaterial Design.” ACM Transactions on Graphics. Association for Computing Machinery, 2023. https://doi.org/10.1145/3605389."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_processing_charge":"Yes (in subscription journal)","author":[{"full_name":"Makatura, Liane","last_name":"Makatura","first_name":"Liane"},{"first_name":"Bohan","full_name":"Wang, Bohan","last_name":"Wang"},{"full_name":"Chen, Yi-Lu","last_name":"Chen","id":"0b467602-dbcd-11ea-9d1d-ed480aa46b70","first_name":"Yi-Lu"},{"first_name":"Bolei","last_name":"Deng","full_name":"Deng, Bolei"},{"first_name":"Christopher J","id":"3C61F1D2-F248-11E8-B48F-1D18A9856A87","last_name":"Wojtan","full_name":"Wojtan, Christopher J","orcid":"0000-0001-6646-5546"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"}],"title":"Procedural metamaterials: A unified procedural graph for metamaterial design"},{"project":[{"_id":"265CB4D0-B435-11E9-9278-68D0E5697425","call_identifier":"FWF","grant_number":"I03600","name":"Optical control of synaptic function via adhesion molecules"},{"name":"Molecular Drug Targets","grant_number":"W1232-B24","call_identifier":"FWF","_id":"2548AE96-B435-11E9-9278-68D0E5697425"},{"_id":"25C5A090-B435-11E9-9278-68D0E5697425","call_identifier":"FWF","name":"The Wittgenstein Prize","grant_number":"Z00312"},{"_id":"23889792-32DE-11EA-91FC-C7463DDC885E","name":"High content imaging to decode human immune cell interactions in health and allergic disease"},{"name":"International IST Doctoral Program","grant_number":"665385","call_identifier":"H2020","_id":"2564DBCA-B435-11E9-9278-68D0E5697425"},{"_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and 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Villalba","orcid":"0000-0001-5665-0430","full_name":"Miguel Villalba, Eder","id":"3FB91342-F248-11E8-B48F-1D18A9856A87","first_name":"Eder"},{"first_name":"Julia M","id":"443DB6DE-F248-11E8-B48F-1D18A9856A87","last_name":"Michalska","orcid":"0000-0003-3862-1235","full_name":"Michalska, Julia M"},{"last_name":"Lyudchik","full_name":"Lyudchik, Julia","id":"46E28B80-F248-11E8-B48F-1D18A9856A87","first_name":"Julia"},{"first_name":"Donglai","full_name":"Wei, Donglai","last_name":"Wei"},{"first_name":"Zudi","last_name":"Lin","full_name":"Lin, Zudi"},{"orcid":"0000-0002-8698-3823","full_name":"Watson, Jake","last_name":"Watson","first_name":"Jake","id":"63836096-4690-11EA-BD4E-32803DDC885E"},{"first_name":"Jakob","full_name":"Troidl, Jakob","last_name":"Troidl"},{"full_name":"Beyer, Johanna","last_name":"Beyer","first_name":"Johanna"},{"last_name":"Ben Simon","full_name":"Ben Simon, Yoav","id":"43DF3136-F248-11E8-B48F-1D18A9856A87","first_name":"Yoav"},{"last_name":"Sommer","orcid":"0000-0003-1216-9105","full_name":"Sommer, Christoph M","first_name":"Christoph M","id":"4DF26D8C-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Wiebke","id":"425C1CE8-F248-11E8-B48F-1D18A9856A87","full_name":"Jahr, Wiebke","last_name":"Jahr"},{"id":"9ac8f577-2357-11eb-997a-e566c5550886","first_name":"Alban","full_name":"Cenameri, Alban","last_name":"Cenameri"},{"first_name":"Johannes","full_name":"Broichhagen, Johannes","last_name":"Broichhagen"},{"first_name":"Seth G.N.","full_name":"Grant, Seth G.N.","last_name":"Grant"},{"first_name":"Peter M","id":"353C1B58-F248-11E8-B48F-1D18A9856A87","last_name":"Jonas","full_name":"Jonas, Peter M","orcid":"0000-0001-5001-4804"},{"last_name":"Novarino","orcid":"0000-0002-7673-7178","full_name":"Novarino, Gaia","id":"3E57A680-F248-11E8-B48F-1D18A9856A87","first_name":"Gaia"},{"last_name":"Pfister","full_name":"Pfister, Hanspeter","first_name":"Hanspeter"},{"full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Johann G","id":"42EFD3B6-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8559-3973","full_name":"Danzl, Johann G","last_name":"Danzl"}],"title":"Dense 4D nanoscale reconstruction of living brain tissue","citation":{"ista":"Velicky P, Miguel Villalba E, Michalska JM, Lyudchik J, Wei D, Lin Z, Watson J, Troidl J, Beyer J, Ben Simon Y, Sommer CM, Jahr W, Cenameri A, Broichhagen J, Grant SGN, Jonas PM, Novarino G, Pfister H, Bickel B, Danzl JG. 2023. Dense 4D nanoscale reconstruction of living brain tissue. Nature Methods. 20, 1256–1265.","chicago":"Velicky, Philipp, Eder Miguel Villalba, Julia M Michalska, Julia Lyudchik, Donglai Wei, Zudi Lin, Jake Watson, et al. “Dense 4D Nanoscale Reconstruction of Living Brain Tissue.” Nature Methods. Springer Nature, 2023. https://doi.org/10.1038/s41592-023-01936-6.","short":"P. Velicky, E. Miguel Villalba, J.M. Michalska, J. Lyudchik, D. Wei, Z. Lin, J. Watson, J. Troidl, J. Beyer, Y. Ben Simon, C.M. Sommer, W. Jahr, A. Cenameri, J. Broichhagen, S.G.N. Grant, P.M. Jonas, G. Novarino, H. Pfister, B. Bickel, J.G. Danzl, Nature Methods 20 (2023) 1256–1265.","ieee":"P. Velicky et al., “Dense 4D nanoscale reconstruction of living brain tissue,” Nature Methods, vol. 20. Springer Nature, pp. 1256–1265, 2023.","apa":"Velicky, P., Miguel Villalba, E., Michalska, J. M., Lyudchik, J., Wei, D., Lin, Z., … Danzl, J. G. (2023). Dense 4D nanoscale reconstruction of living brain tissue. Nature Methods. Springer Nature. https://doi.org/10.1038/s41592-023-01936-6","ama":"Velicky P, Miguel Villalba E, Michalska JM, et al. Dense 4D nanoscale reconstruction of living brain tissue. Nature Methods. 2023;20:1256-1265. doi:10.1038/s41592-023-01936-6","mla":"Velicky, Philipp, et al. “Dense 4D Nanoscale Reconstruction of Living Brain Tissue.” Nature Methods, vol. 20, Springer Nature, 2023, pp. 1256–65, doi:10.1038/s41592-023-01936-6."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"quality_controlled":"1","publisher":"Springer Nature","acknowledgement":"We thank J. Vorlaufer, N. Agudelo and A. Wartak for microscope maintenance and troubleshooting, C. Kreuzinger and A. Freeman for technical assistance, M. Šuplata for hardware control support and M. Cunha dos Santos for initial exploration of software. We\r\nthank P. Henderson for advice on deep-learning training and M. Sixt, S. Boyd and T. Weiss for discussions and critical reading of the manuscript. L. Lavis (Janelia Research Campus) generously provided the JF585-HaloTag ligand. We acknowledge expert support by IST\r\nAustria’s scientific computing, imaging and optics, preclinical, library and laboratory support facilities and by the Miba machine shop. We gratefully acknowledge funding by the following sources: Austrian Science Fund (F.W.F.) grant no. I3600-B27 (J.G.D.), grant no. DK W1232\r\n(J.G.D. and J.M.M.) and grant no. Z 312-B27, Wittgenstein award (P.J.); the Gesellschaft für Forschungsförderung NÖ grant no. LSC18-022 (J.G.D.); an ISTA Interdisciplinary project grant (J.G.D. and B.B.); the European Union’s Horizon 2020 research and innovation programme,\r\nMarie-Skłodowska Curie grant 665385 (J.M.M. and J.L.); the European Union’s Horizon 2020 research and innovation programme, European Research Council grant no. 715767, MATERIALIZABLE (B.B.); grant no. 715508, REVERSEAUTISM (G.N.); grant no. 695568, SYNNOVATE (S.G.N.G.); and grant no. 692692, GIANTSYN (P.J.); the Simons\r\nFoundation Autism Research Initiative grant no. 529085 (S.G.N.G.); the Wellcome Trust Technology Development grant no. 202932 (S.G.N.G.); the Marie Skłodowska-Curie Actions Individual Fellowship no. 101026635 under the EU Horizon 2020 program (J.F.W.);\r\nthe Human Frontier Science Program postdoctoral fellowship LT000557/2018 (W.J.); and the National Science Foundation grant no. IIS-1835231 (H.P.) and NCS-FO-2124179 (H.P.).","page":"1256-1265","date_created":"2023-07-23T22:01:13Z","date_published":"2023-08-01T00:00:00Z","doi":"10.1038/s41592-023-01936-6","year":"2023","isi":1,"publication":"Nature Methods","day":"01","article_type":"original","type":"journal_article","status":"public","_id":"13267","department":[{"_id":"PeJo"},{"_id":"GaNo"},{"_id":"BeBi"},{"_id":"JoDa"},{"_id":"Bio"}],"date_updated":"2024-01-10T08:37:48Z","main_file_link":[{"url":"https://doi.org/10.1038/s41592-023-01936-6","open_access":"1"}],"scopus_import":"1","intvolume":" 20","month":"08","abstract":[{"lang":"eng","text":"Three-dimensional (3D) reconstruction of living brain tissue down to an individual synapse level would create opportunities for decoding the dynamics and structure–function relationships of the brain’s complex and dense information processing network; however, this has been hindered by insufficient 3D resolution, inadequate signal-to-noise ratio and prohibitive light burden in optical imaging, whereas electron microscopy is inherently static. Here we solved these challenges by developing an integrated optical/machine-learning technology, LIONESS (live information-optimized nanoscopy enabling saturated segmentation). This leverages optical modifications to stimulated emission depletion microscopy in comprehensively, extracellularly labeled tissue and previous information on sample structure via machine learning to simultaneously achieve isotropic super-resolution, high signal-to-noise ratio and compatibility with living tissue. This allows dense deep-learning-based instance segmentation and 3D reconstruction at a synapse level, incorporating molecular, activity and morphodynamic information. LIONESS opens up avenues for studying the dynamic functional (nano-)architecture of living brain tissue."}],"acknowledged_ssus":[{"_id":"ScienComp"},{"_id":"Bio"},{"_id":"PreCl"},{"_id":"E-Lib"},{"_id":"LifeSc"},{"_id":"M-Shop"}],"oa_version":"Published Version","pmid":1,"ec_funded":1,"related_material":{"link":[{"url":"https://github.com/danzllab/LIONESS","relation":"software"}],"record":[{"status":"public","id":"12817","relation":"research_data"},{"relation":"shorter_version","status":"public","id":"14770"}]},"volume":20,"publication_status":"published","publication_identifier":{"eissn":["1548-7105"],"issn":["1548-7091"]},"language":[{"iso":"eng"}]},{"article_number":"142","project":[{"grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"mla":"Freire, Marco, et al. “PCBend: Light up Your 3D Shapes with Foldable Circuit Boards.” Transactions on Graphics, vol. 42, no. 4, 142, Association for Computing Machinery, 2023, doi:10.1145/3592411.","ama":"Freire M, Bhargava M, Schreck C, Hugron P-A, Bickel B, Lefebvre S. PCBend: Light up your 3D shapes with foldable circuit boards. Transactions on Graphics. 2023;42(4). doi:10.1145/3592411","apa":"Freire, M., Bhargava, M., Schreck, C., Hugron, P.-A., Bickel, B., & Lefebvre, S. (2023). PCBend: Light up your 3D shapes with foldable circuit boards. Transactions on Graphics. Los Angeles, CA, United States: Association for Computing Machinery. https://doi.org/10.1145/3592411","ieee":"M. Freire, M. Bhargava, C. Schreck, P.-A. Hugron, B. Bickel, and S. Lefebvre, “PCBend: Light up your 3D shapes with foldable circuit boards,” Transactions on Graphics, vol. 42, no. 4. Association for Computing Machinery, 2023.","short":"M. Freire, M. Bhargava, C. Schreck, P.-A. Hugron, B. Bickel, S. Lefebvre, Transactions on Graphics 42 (2023).","chicago":"Freire, Marco, Manas Bhargava, Camille Schreck, Pierre-Alexandre Hugron, Bernd Bickel, and Sylvain Lefebvre. “PCBend: Light up Your 3D Shapes with Foldable Circuit Boards.” Transactions on Graphics. Association for Computing Machinery, 2023. https://doi.org/10.1145/3592411.","ista":"Freire M, Bhargava M, Schreck C, Hugron P-A, Bickel B, Lefebvre S. 2023. PCBend: Light up your 3D shapes with foldable circuit boards. Transactions on Graphics. 42(4), 142."},"title":"PCBend: Light up your 3D shapes with foldable circuit boards","author":[{"first_name":"Marco","full_name":"Freire, Marco","last_name":"Freire"},{"first_name":"Manas","id":"FF8FA64C-AA6A-11E9-99AD-50D4E5697425","full_name":"Bhargava, Manas","orcid":"0009-0007-6138-6890","last_name":"Bhargava"},{"full_name":"Schreck, Camille","last_name":"Schreck","first_name":"Camille","id":"2B14B676-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Hugron, Pierre-Alexandre","last_name":"Hugron","first_name":"Pierre-Alexandre"},{"orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"last_name":"Lefebvre","full_name":"Lefebvre, Sylvain","first_name":"Sylvain"}],"article_processing_charge":"No","external_id":{"isi":["001044671300108"]},"acknowledgement":"We thank the reviewers for the valuable feedback. We also thank the Miba Machine Shop at ISTA, PCBWay, and PragoBoard for helping us with fabrication and assembly. This project was supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 715767 – MATERIALIZABLE).","quality_controlled":"1","publisher":"Association for Computing Machinery","oa":1,"day":"26","publication":"Transactions on Graphics","isi":1,"has_accepted_license":"1","year":"2023","doi":"10.1145/3592411","date_published":"2023-07-26T00:00:00Z","date_created":"2023-05-22T08:37:04Z","_id":"13049","status":"public","keyword":["PCB design and layout","Mesh geometry models"],"article_type":"original","type":"journal_article","conference":{"name":"SIGGRAPH: Computer Graphics and Interactive Techniques Conference","location":"Los Angeles, CA, United States","end_date":"2023-08-10","start_date":"2023-08-06"},"ddc":["006"],"date_updated":"2024-01-29T10:30:49Z","department":[{"_id":"GradSch"},{"_id":"BeBi"}],"file_date_updated":"2023-06-20T12:20:51Z","oa_version":"Submitted Version","abstract":[{"lang":"eng","text":"We propose a computational design approach for covering a surface with individually addressable RGB LEDs, effectively forming a low-resolution surface screen. To achieve a low-cost and scalable approach, we propose creating designs from flat PCB panels bent in-place along the surface of a 3D printed core. Working with standard rigid PCBs enables the use of\r\nestablished PCB manufacturing services, allowing the fabrication of designs with several hundred LEDs. \r\nOur approach optimizes the PCB geometry for folding, and then jointly optimizes the LED packing, circuit and routing, solving a challenging layout problem under strict manufacturing requirements. Unlike paper, PCBs cannot bend beyond a certain point without breaking. Therefore, we introduce parametric cut patterns acting as hinges, designed to allow bending while remaining compact. To tackle the joint optimization of placement, circuit and routing, we propose a specialized algorithm that splits the global problem into one sub-problem per triangle, which is then individually solved.\r\nOur technique generates PCB blueprints in a completely automated way. After being fabricated by a PCB manufacturing service, the boards are bent and glued by the user onto the 3D printed support. We demonstrate our technique on a range of physical models and virtual examples, creating intricate surface light patterns from hundreds of LEDs."}],"acknowledged_ssus":[{"_id":"M-Shop"}],"month":"07","intvolume":" 42","file":[{"relation":"main_file","access_level":"open_access","content_type":"application/pdf","success":1,"file_id":"13156","checksum":"a0b0ba3b36f43a94388e8824613d812a","creator":"dernst","file_size":78940724,"date_updated":"2023-06-19T11:02:23Z","file_name":"2023_ACMToG_Freire.pdf","date_created":"2023-06-19T11:02:23Z"},{"file_id":"13157","checksum":"b9206bbb67af82df49b7e7cdbde3410c","success":1,"access_level":"open_access","relation":"main_file","content_type":"application/pdf","date_created":"2023-06-20T12:20:51Z","file_name":"2023_ACMToG_SuppMaterial_Freire.pdf","creator":"dernst","date_updated":"2023-06-20T12:20:51Z","file_size":34345905}],"language":[{"iso":"eng"}],"publication_identifier":{"eissn":["1557-7368"],"issn":["0730-0301"]},"publication_status":"published","issue":"4","volume":42,"ec_funded":1},{"article_processing_charge":"No","external_id":{"isi":["001044671300033"]},"author":[{"id":"62E473F4-5C99-11EA-A40E-AF823DDC885E","first_name":"Michael","full_name":"Piovarci, Michael","orcid":"0000-0002-5062-4474","last_name":"Piovarci"},{"full_name":"Chapiro, Alexandre","last_name":"Chapiro","first_name":"Alexandre"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385"}],"title":"Skin-Screen: A computational fabrication framework for color tattoos","citation":{"ista":"Piovarci M, Chapiro A, Bickel B. 2023. Skin-Screen: A computational fabrication framework for color tattoos. Transactions on Graphics. 42(4), 67.","chicago":"Piovarci, Michael, Alexandre Chapiro, and Bernd Bickel. “Skin-Screen: A Computational Fabrication Framework for Color Tattoos.” Transactions on Graphics. Association for Computing Machinery, 2023. https://doi.org/10.1145/3592432.","ama":"Piovarci M, Chapiro A, Bickel B. Skin-Screen: A computational fabrication framework for color tattoos. Transactions on Graphics. 2023;42(4). doi:10.1145/3592432","apa":"Piovarci, M., Chapiro, A., & Bickel, B. (2023). Skin-Screen: A computational fabrication framework for color tattoos. Transactions on Graphics. Los Angeles, CA, United States: Association for Computing Machinery. https://doi.org/10.1145/3592432","short":"M. Piovarci, A. Chapiro, B. Bickel, Transactions on Graphics 42 (2023).","ieee":"M. Piovarci, A. Chapiro, and B. Bickel, “Skin-Screen: A computational fabrication framework for color tattoos,” Transactions on Graphics, vol. 42, no. 4. Association for Computing Machinery, 2023.","mla":"Piovarci, Michael, et al. “Skin-Screen: A Computational Fabrication Framework for Color Tattoos.” Transactions on Graphics, vol. 42, no. 4, 67, Association for Computing Machinery, 2023, doi:10.1145/3592432."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","project":[{"_id":"eb901961-77a9-11ec-83b8-f5c883a62027","name":"Perception-Aware Appearance Fabrication","grant_number":"M03319"}],"article_number":"67","date_created":"2023-05-16T09:39:14Z","date_published":"2023-07-26T00:00:00Z","doi":"10.1145/3592432","year":"2023","isi":1,"has_accepted_license":"1","publication":"Transactions on Graphics","day":"26","oa":1,"publisher":"Association for Computing Machinery","quality_controlled":"1","acknowledgement":"We thank Todor Asenov and the Miba Machine Shop for their help in assembling the tattoo machine and manufacturing the substrates. We thank Geysler Rodrigues for the insightful discussions on tattooing practices from a professional artist's perspective. We thank Maria Fernanda Portugal for sharing a doctor's perspective on medical applications of tattoos. This work is graciously supported by the FWF Lise Meitner (Grant M 3319).","department":[{"_id":"BeBi"}],"file_date_updated":"2023-05-16T09:38:25Z","date_updated":"2024-01-29T10:27:23Z","ddc":["004"],"conference":{"name":"SIGGRAPH: Computer Graphics and Interactive Techniques Conference","start_date":"2023-08-06","location":"Los Angeles, CA, United States","end_date":"2023-08-10"},"article_type":"original","type":"journal_article","keyword":["appearance","modeling","reproduction","tattoo","skin color","gamut mapping","ink-optimization","prosthetic"],"status":"public","_id":"12984","issue":"4","volume":42,"publication_status":"published","publication_identifier":{"eissn":["1557-7368"],"issn":["0730-0301"]},"language":[{"iso":"eng"}],"file":[{"relation":"main_file","access_level":"open_access","content_type":"application/pdf","success":1,"checksum":"5f0a6867689e025a661bd0b4fd90b821","file_id":"12985","creator":"mpiovarc","file_size":30817343,"date_updated":"2023-05-16T09:38:25Z","file_name":"Piovarci2023.pdf","date_created":"2023-05-16T09:38:25Z"}],"intvolume":" 42","month":"07","acknowledged_ssus":[{"_id":"M-Shop"}],"abstract":[{"lang":"eng","text":"Tattoos are a highly popular medium, with both artistic and medical applications. Although the mechanical process of tattoo application has evolved historically, the results are reliant on the artisanal skill of the artist. This can be especially challenging for some skin tones, or in cases where artists lack experience. We provide the first systematic overview of tattooing as a computational fabrication technique. We built an automated tattooing rig and a recipe for the creation of silicone sheets mimicking realistic skin tones, which allowed us to create an accurate model predicting tattoo appearance. This enables several exciting applications including tattoo previewing, color retargeting, novel ink spectra optimization, color-accurate prosthetics, and more."}],"oa_version":"Submitted Version"},{"abstract":[{"lang":"eng","text":"Color and gloss are fundamental aspects of surface appearance. State-of-the-art fabrication techniques can manipulate both properties of the printed 3D objects. However, in the context of appearance reproduction, perceptual aspects of color and gloss are usually handled separately, even though previous perceptual studies suggest their interaction. Our work is motivated by previous studies demonstrating a perceived color shift due to a change in the object's gloss, i.e., two samples with the same color but different surface gloss appear as they have different colors. In this paper, we conduct new experiments which support this observation and provide insights into the magnitude and direction of the perceived color change. We use the observations as guidance to design a new method that estimates and corrects the color shift enabling the fabrication of objects with the same perceived color but different surface gloss. We formulate the problem as an optimization procedure solved using differentiable rendering. We evaluate the effectiveness of our method in perceptual experiments with 3D objects fabricated using a multi-material 3D printer and demonstrate potential applications. "}],"oa_version":"Published Version","month":"07","publication_identifier":{"isbn":["9798400701597"]},"publication_status":"published","file":[{"creator":"mpiovarc","date_updated":"2023-05-16T09:32:50Z","file_size":42323971,"date_created":"2023-05-16T09:32:50Z","file_name":"Condor2023_supplemental.pdf","access_level":"open_access","relation":"main_file","content_type":"application/pdf","checksum":"84a437739af5d46507928939b20c0c28","file_id":"12983","success":1},{"file_name":"2023_Siggraph_Condor.pdf","date_created":"2024-01-29T10:14:10Z","file_size":26079404,"date_updated":"2024-01-29T10:14:10Z","creator":"dernst","success":1,"file_id":"14893","checksum":"0f5c8b242e8e7c153c04888c4d0c6f37","content_type":"application/pdf","relation":"main_file","access_level":"open_access"}],"language":[{"iso":"eng"}],"license":"https://creativecommons.org/licenses/by/4.0/","_id":"12979","type":"conference","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"conference":{"location":"Los Angeles, CA, United States","end_date":"2023-08-10","start_date":"2023-08-06","name":"SIGGRAPH: Computer Graphics and Interactive Techniques Conference"},"status":"public","keyword":["color","gloss","perception","color compensation","color management"],"date_updated":"2024-02-28T12:52:04Z","ddc":["004"],"file_date_updated":"2024-01-29T10:14:10Z","department":[{"_id":"BeBi"}],"acknowledgement":"We thank Matthew S Zurawski for the 3D model of the car speed shape. This research has been supported by the Swiss National Science Foundation (SNSF, Grant 200502) and the FWF Lise Meitner (Grant M 3319).","publisher":"Association for Computing Machinery","quality_controlled":"1","oa":1,"has_accepted_license":"1","isi":1,"year":"2023","day":"23","publication":"SIGGRAPH ’23 Conference Proceedings","date_published":"2023-07-23T00:00:00Z","doi":"10.1145/3588432.3591546","date_created":"2023-05-16T09:34:13Z","article_number":"21","project":[{"name":"Perception-Aware Appearance Fabrication","grant_number":"M03319","_id":"eb901961-77a9-11ec-83b8-f5c883a62027"}],"citation":{"chicago":"Condor, Jorge, Michael Piovarci, Bernd Bickel, and Piotr Didyk. “Gloss-Aware Color Correction for 3D Printing.” In SIGGRAPH ’23 Conference Proceedings. Association for Computing Machinery, 2023. https://doi.org/10.1145/3588432.3591546.","ista":"Condor J, Piovarci M, Bickel B, Didyk P. 2023. Gloss-aware color correction for 3D printing. SIGGRAPH ’23 Conference Proceedings. SIGGRAPH: Computer Graphics and Interactive Techniques Conference, 21.","mla":"Condor, Jorge, et al. “Gloss-Aware Color Correction for 3D Printing.” SIGGRAPH ’23 Conference Proceedings, 21, Association for Computing Machinery, 2023, doi:10.1145/3588432.3591546.","ieee":"J. Condor, M. Piovarci, B. Bickel, and P. Didyk, “Gloss-aware color correction for 3D printing,” in SIGGRAPH ’23 Conference Proceedings, Los Angeles, CA, United States, 2023.","short":"J. Condor, M. Piovarci, B. Bickel, P. Didyk, in:, SIGGRAPH ’23 Conference Proceedings, Association for Computing Machinery, 2023.","apa":"Condor, J., Piovarci, M., Bickel, B., & Didyk, P. (2023). Gloss-aware color correction for 3D printing. In SIGGRAPH ’23 Conference Proceedings. Los Angeles, CA, United States: Association for Computing Machinery. https://doi.org/10.1145/3588432.3591546","ama":"Condor J, Piovarci M, Bickel B, Didyk P. Gloss-aware color correction for 3D printing. In: SIGGRAPH ’23 Conference Proceedings. Association for Computing Machinery; 2023. doi:10.1145/3588432.3591546"},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"last_name":"Condor","full_name":"Condor, Jorge","first_name":"Jorge"},{"last_name":"Piovarci","full_name":"Piovarci, Michael","orcid":"0000-0002-5062-4474","first_name":"Michael","id":"62E473F4-5C99-11EA-A40E-AF823DDC885E"},{"last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Didyk","full_name":"Didyk, Piotr","first_name":"Piotr"}],"external_id":{"isi":["001117690500021"]},"article_processing_charge":"No","title":"Gloss-aware color correction for 3D printing"},{"_id":"13188","type":"journal_article","article_type":"original","status":"public","keyword":["Computer Graphics","Computational Design","Computational Geometry","Shape Modeling"],"date_updated":"2024-03-27T23:30:46Z","ddc":["516"],"file_date_updated":"2023-07-04T08:11:28Z","department":[{"_id":"BeBi"}],"acknowledged_ssus":[{"_id":"M-Shop"}],"abstract":[{"lang":"eng","text":"The Kirchhoff rod model describes the bending and twisting of slender elastic rods in three dimensions, and has been widely studied to enable the prediction of how a rod will deform, given its geometry and boundary conditions. In this work, we study a number of inverse problems with the goal of computing the geometry of a straight rod that will automatically deform to match a curved target shape after attaching its endpoints to a support structure. Our solution lets us finely control the static equilibrium state of a rod by varying the cross-sectional profiles along its length.\r\nWe also show that the set of physically realizable equilibrium states admits a concise geometric description in terms of linear line complexes, which leads to very efficient computational design algorithms. Implemented in an interactive software tool, they allow us to convert three-dimensional hand-drawn spline curves to elastic rods, and give feedback about the feasibility and practicality of a design in real time. We demonstrate the efficacy of our method by designing and manufacturing several physical prototypes with applications to interior design and soft robotics."}],"oa_version":"Submitted Version","month":"09","intvolume":" 42","publication_identifier":{"issn":["0730-0301"],"eissn":["1557-7368"]},"publication_status":"published","file":[{"checksum":"4954c1cfa487725bc156dcfec872478a","file_id":"13194","success":1,"access_level":"open_access","relation":"main_file","content_type":"application/pdf","date_created":"2023-07-04T08:11:28Z","file_name":"kirchhoff-rods.pdf","creator":"chafner","date_updated":"2023-07-04T08:11:28Z","file_size":19635168},{"file_name":"supp-main.pdf","date_created":"2023-07-04T07:46:28Z","title":"Supplemental Material with Proofs","file_size":420909,"date_updated":"2023-07-04T07:46:28Z","creator":"chafner","checksum":"79c9975fbc82ff71f1767331d2204cca","file_id":"13190","content_type":"application/pdf","relation":"supplementary_material","access_level":"open_access"},{"file_id":"13191","checksum":"4ab647e4f03c711e1e6a5fc1eb8684db","relation":"supplementary_material","access_level":"open_access","content_type":"application/pdf","file_name":"supp-cheat.pdf","date_created":"2023-07-04T07:46:30Z","title":"Cheat Sheet for Notation","creator":"chafner","file_size":430086,"date_updated":"2023-07-04T07:46:30Z"},{"content_type":"video/mp4","access_level":"open_access","relation":"supplementary_material","file_id":"13192","checksum":"c0fd9a57d012046de90c185ffa904b76","date_updated":"2023-07-04T07:46:39Z","file_size":268088064,"creator":"chafner","title":"Supplemental Video","date_created":"2023-07-04T07:46:39Z","file_name":"kirchhoff-video-final.mp4"},{"checksum":"71b00712b489ada2cd9815910ee180a9","file_id":"13193","relation":"supplementary_material","access_level":"open_access","content_type":"application/x-zip-compressed","file_name":"matlab-submission.zip","title":"Matlab Source Code with Example","date_created":"2023-07-04T07:47:10Z","creator":"chafner","file_size":25790,"date_updated":"2023-07-04T07:47:10Z"}],"language":[{"iso":"eng"}],"issue":"5","related_material":{"record":[{"relation":"part_of_dissertation","status":"public","id":"12897"}]},"volume":42,"ec_funded":1,"article_number":"171","project":[{"_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling"}],"citation":{"chicago":"Hafner, Christian, and Bernd Bickel. “The Design Space of Kirchhoff Rods.” ACM Transactions on Graphics. Association for Computing Machinery, 2023. https://doi.org/10.1145/3606033.","ista":"Hafner C, Bickel B. 2023. The design space of Kirchhoff rods. ACM Transactions on Graphics. 42(5), 171.","mla":"Hafner, Christian, and Bernd Bickel. “The Design Space of Kirchhoff Rods.” ACM Transactions on Graphics, vol. 42, no. 5, 171, Association for Computing Machinery, 2023, doi:10.1145/3606033.","apa":"Hafner, C., & Bickel, B. (2023). The design space of Kirchhoff rods. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3606033","ama":"Hafner C, Bickel B. The design space of Kirchhoff rods. ACM Transactions on Graphics. 2023;42(5). doi:10.1145/3606033","short":"C. Hafner, B. Bickel, ACM Transactions on Graphics 42 (2023).","ieee":"C. Hafner and B. Bickel, “The design space of Kirchhoff rods,” ACM Transactions on Graphics, vol. 42, no. 5. Association for Computing Machinery, 2023."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"id":"400429CC-F248-11E8-B48F-1D18A9856A87","first_name":"Christian","last_name":"Hafner","full_name":"Hafner, Christian"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel"}],"article_processing_charge":"No","external_id":{"isi":["001086833300010"]},"title":"The design space of Kirchhoff rods","acknowledgement":"We thank the anonymous reviewers for their generous feedback, and Julian Fischer for his help in proving Proposition 1. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 715767).","quality_controlled":"1","publisher":"Association for Computing Machinery","oa":1,"has_accepted_license":"1","isi":1,"year":"2023","day":"20","publication":"ACM Transactions on Graphics","date_published":"2023-09-20T00:00:00Z","doi":"10.1145/3606033","date_created":"2023-07-04T07:41:30Z"},{"ec_funded":1,"related_material":{"link":[{"url":"https://ista.ac.at/en/news/machine-learning-3d-printing-fluids/","relation":"press_release","description":"News on ISTA website"}]},"volume":41,"issue":"4","publication_status":"published","publication_identifier":{"eissn":["1557-7368"],"issn":["0730-0301"]},"language":[{"iso":"eng"}],"file":[{"content_type":"application/pdf","relation":"main_file","access_level":"open_access","success":1,"file_id":"11467","checksum":"27f6fe41c6ff84d50445cc9b0176d45b","file_size":33994829,"date_updated":"2022-06-28T08:32:58Z","creator":"dernst","file_name":"2022_ACM_acceptedversion_Piovarci.pdf","date_created":"2022-06-28T08:32:58Z"}],"intvolume":" 41","month":"06","abstract":[{"lang":"eng","text":"Enabling additive manufacturing to employ a wide range of novel, functional materials can be a major boost to this technology. However, making such materials printable requires painstaking trial-and-error by an expert operator,\r\nas they typically tend to exhibit peculiar rheological or hysteresis properties. Even in the case of successfully finding the process parameters, there is no guarantee of print-to-print consistency due to material differences between batches. These challenges make closed-loop feedback an attractive option where the process parameters are adjusted on-the-fly. There are several challenges for designing an efficient controller: the deposition parameters are complex and highly coupled, artifacts occur after long time horizons, simulating the deposition is computationally costly, and learning on hardware is intractable. In this work, we demonstrate the feasibility of learning a closed-loop control policy for additive manufacturing using reinforcement learning. We show that approximate, but efficient, numerical simulation is\r\nsufficient as long as it allows learning the behavioral patterns of deposition that translate to real-world experiences. In combination with reinforcement learning, our model can be used to discover control policies that outperform\r\nbaseline controllers. Furthermore, the recovered policies have a minimal sim-to-real gap. We showcase this by applying our control policy in-vivo on a single-layer, direct ink writing printer. "}],"oa_version":"Submitted Version","department":[{"_id":"BeBi"}],"file_date_updated":"2022-06-28T08:32:58Z","date_updated":"2023-05-31T12:38:21Z","ddc":["000"],"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"article_type":"original","type":"journal_article","status":"public","_id":"11442","date_created":"2022-06-10T06:41:47Z","doi":"10.1145/3528223.3530144","date_published":"2022-06-01T00:00:00Z","year":"2022","has_accepted_license":"1","publication":"ACM Transactions on Graphics","day":"01","oa":1,"quality_controlled":"1","publisher":"Association for Computing Machinery","acknowledgement":"This work is graciously supported by the following grant agencies: FWF Lise Meitner (Grant M 3319), SNSF (Grant 200502), ERC Starting Grant (MATERIALIZABLE-715767), NSF (Grant IIS-181507).\r\n","external_id":{"arxiv":["2201.11819"]},"article_processing_charge":"No","author":[{"last_name":"Piovarci","full_name":"Piovarci, Michael","id":"62E473F4-5C99-11EA-A40E-AF823DDC885E","first_name":"Michael"},{"first_name":"Michael","last_name":"Foshey","full_name":"Foshey, Michael"},{"first_name":"Jie","full_name":"Xu, Jie","last_name":"Xu"},{"first_name":"Timothy","last_name":"Erps","full_name":"Erps, Timothy"},{"last_name":"Babaei","full_name":"Babaei, Vahid","first_name":"Vahid"},{"full_name":"Didyk, Piotr","last_name":"Didyk","first_name":"Piotr"},{"last_name":"Rusinkiewicz","full_name":"Rusinkiewicz, Szymon","first_name":"Szymon"},{"last_name":"Matusik","full_name":"Matusik, Wojciech","first_name":"Wojciech"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel"}],"title":"Closed-loop control of direct ink writing via reinforcement learning","citation":{"mla":"Piovarci, Michael, et al. “Closed-Loop Control of Direct Ink Writing via Reinforcement Learning.” ACM Transactions on Graphics, vol. 41, no. 4, 112, Association for Computing Machinery, 2022, doi:10.1145/3528223.3530144.","apa":"Piovarci, M., Foshey, M., Xu, J., Erps, T., Babaei, V., Didyk, P., … Bickel, B. (2022). Closed-loop control of direct ink writing via reinforcement learning. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3528223.3530144","ama":"Piovarci M, Foshey M, Xu J, et al. Closed-loop control of direct ink writing via reinforcement learning. ACM Transactions on Graphics. 2022;41(4). doi:10.1145/3528223.3530144","ieee":"M. Piovarci et al., “Closed-loop control of direct ink writing via reinforcement learning,” ACM Transactions on Graphics, vol. 41, no. 4. Association for Computing Machinery, 2022.","short":"M. Piovarci, M. Foshey, J. Xu, T. Erps, V. Babaei, P. Didyk, S. Rusinkiewicz, W. Matusik, B. Bickel, ACM Transactions on Graphics 41 (2022).","chicago":"Piovarci, Michael, Michael Foshey, Jie Xu, Timothy Erps, Vahid Babaei, Piotr Didyk, Szymon Rusinkiewicz, Wojciech Matusik, and Bernd Bickel. “Closed-Loop Control of Direct Ink Writing via Reinforcement Learning.” ACM Transactions on Graphics. Association for Computing Machinery, 2022. https://doi.org/10.1145/3528223.3530144.","ista":"Piovarci M, Foshey M, Xu J, Erps T, Babaei V, Didyk P, Rusinkiewicz S, Matusik W, Bickel B. 2022. Closed-loop control of direct ink writing via reinforcement learning. ACM Transactions on Graphics. 41(4), 112."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","project":[{"name":"Perception-Aware Appearance Fabrication","grant_number":"M03319","_id":"eb901961-77a9-11ec-83b8-f5c883a62027"},{"call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767"}],"article_number":"112"},{"oa_version":"Submitted Version","abstract":[{"lang":"eng","text":"We study structural rigidity for assemblies with mechanical joints. Existing methods identify whether an assembly is structurally rigid by assuming parts are perfectly rigid. Yet, an assembly identified as rigid may not be that “rigid” in practice, and existing methods cannot quantify how rigid an assembly is. We address this limitation by developing a new measure, worst-case rigidity, to quantify the rigidity of an assembly as the largest possible deformation that the assembly undergoes for arbitrary external loads of fixed magnitude. Computing worst-case rigidity is non-trivial due to non-rigid parts and different joint types. We thus formulate a new computational approach by encoding parts and their connections into a stiffness matrix, in which parts are modeled as deformable objects and joints as soft constraints. Based on this, we formulate worst-case rigidity analysis as an optimization that seeks the worst-case deformation of an assembly for arbitrary external loads, and solve the optimization problem via an eigenanalysis. Furthermore, we present methods to optimize the geometry and topology of various assemblies to enhance their rigidity, as guided by our rigidity measure. In the end, we validate our method on a variety of assembly structures with physical experiments and demonstrate its effectiveness by designing and fabricating several structurally rigid assemblies."}],"acknowledged_ssus":[{"_id":"M-Shop"}],"intvolume":" 41","month":"05","scopus_import":"1","language":[{"iso":"eng"}],"file":[{"date_created":"2022-03-27T17:34:11Z","file_name":"paper.pdf","creator":"bbickel","date_updated":"2022-03-27T17:34:11Z","file_size":19601689,"checksum":"b62188b07f5c000f1638c782ec92da41","file_id":"10923","access_level":"open_access","relation":"main_file","content_type":"application/pdf"}],"publication_status":"published","publication_identifier":{"issn":["0167-7055"],"eissn":["1467-8659"]},"ec_funded":1,"issue":"2","volume":41,"_id":"10922","status":"public","article_type":"original","type":"journal_article","ddc":["000"],"date_updated":"2023-08-03T06:17:13Z","file_date_updated":"2022-03-27T17:34:11Z","department":[{"_id":"BeBi"}],"acknowledgement":"This work was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China [Project No.: CUHK 14201921] and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 715767 – MATERIALIZABLE). We thank the anonymous reviewers for their insightful feedback; Christian Hafner for proofreading and discussions; Ziqi Wang,\r\nHaisen Zhao, and Martin Hafskjold Thoresen for the helpful discussions; and the Miba Machine Shop at IST Austria for 3D printing the BUNNY and BOOMERANG models.","oa":1,"quality_controlled":"1","publisher":"Wiley","publication":"Computer Graphics Forum","day":"01","year":"2022","has_accepted_license":"1","isi":1,"date_created":"2022-03-27T17:34:17Z","doi":"10.1111/cgf.14490","date_published":"2022-05-01T00:00:00Z","page":"507-519","project":[{"call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"mla":"Liu, Zhenyuan, et al. “Worst-Case Rigidity Analysis and Optimization for Assemblies with Mechanical Joints.” Computer Graphics Forum, vol. 41, no. 2, Wiley, 2022, pp. 507–19, doi:10.1111/cgf.14490.","ama":"Liu Z, Hu J, Xu H, et al. Worst-case rigidity analysis and optimization for assemblies with mechanical joints. Computer Graphics Forum. 2022;41(2):507-519. doi:10.1111/cgf.14490","apa":"Liu, Z., Hu, J., Xu, H., Song, P., Zhang, R., Bickel, B., & Fu, C.-W. (2022). Worst-case rigidity analysis and optimization for assemblies with mechanical joints. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.14490","ieee":"Z. Liu et al., “Worst-case rigidity analysis and optimization for assemblies with mechanical joints,” Computer Graphics Forum, vol. 41, no. 2. Wiley, pp. 507–519, 2022.","short":"Z. Liu, J. Hu, H. Xu, P. Song, R. Zhang, B. Bickel, C.-W. Fu, Computer Graphics Forum 41 (2022) 507–519.","chicago":"Liu, Zhenyuan, Jingyu Hu, Hao Xu, Peng Song, Ran Zhang, Bernd Bickel, and Chi-Wing Fu. “Worst-Case Rigidity Analysis and Optimization for Assemblies with Mechanical Joints.” Computer Graphics Forum. Wiley, 2022. https://doi.org/10.1111/cgf.14490.","ista":"Liu Z, Hu J, Xu H, Song P, Zhang R, Bickel B, Fu C-W. 2022. Worst-case rigidity analysis and optimization for assemblies with mechanical joints. Computer Graphics Forum. 41(2), 507–519."},"title":"Worst-case rigidity analysis and optimization for assemblies with mechanical joints","article_processing_charge":"No","external_id":{"isi":["000802723900039"]},"author":[{"last_name":"Liu","orcid":"0000-0001-9200-5690","full_name":"Liu, Zhenyuan","id":"70f0d7cf-ae65-11ec-a14f-89dfc5505b19","first_name":"Zhenyuan"},{"full_name":"Hu, Jingyu","last_name":"Hu","first_name":"Jingyu"},{"full_name":"Xu, Hao","last_name":"Xu","first_name":"Hao"},{"first_name":"Peng","last_name":"Song","full_name":"Song, Peng"},{"first_name":"Ran","full_name":"Zhang, Ran","last_name":"Zhang"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel"},{"first_name":"Chi-Wing","full_name":"Fu, Chi-Wing","last_name":"Fu"}]},{"date_created":"2022-08-07T22:01:57Z","date_published":"2022-07-22T00:00:00Z","doi":"10.1145/3528223.3530071","publication":"ACM Transactions on Graphics","day":"22","year":"2022","isi":1,"has_accepted_license":"1","oa":1,"quality_controlled":"1","publisher":"Association for Computing Machinery","acknowledgement":"We thank the reviewers for the valuable comments, David Gontier for sharing the source code of the baseline design approach, Christian Hafner for proofreading the paper, Keenan Crane for the 3D model of Cow, and Thingiverse for the 3D models of Moai and Owl. This work was supported by the SUTD Start-up Research Grant (Number: SRG ISTD 2019 148), the Swiss National Science Foundation (NCCR Digital Fabrication Agreement #51NF40-141853), and\r\nthe European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No 715767 – MATERIALIZABLE).","title":"Computational design of high-level interlocking puzzles","external_id":{"isi":["000830989200018"]},"article_processing_charge":"No","author":[{"first_name":"Rulin","full_name":"Chen, Rulin","last_name":"Chen"},{"last_name":"Wang","full_name":"Wang, Ziqi","first_name":"Ziqi"},{"last_name":"Song","full_name":"Song, Peng","first_name":"Peng"},{"full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"mla":"Chen, Rulin, et al. “Computational Design of High-Level Interlocking Puzzles.” ACM Transactions on Graphics, vol. 41, no. 4, 150, Association for Computing Machinery, 2022, doi:10.1145/3528223.3530071.","ieee":"R. Chen, Z. Wang, P. Song, and B. Bickel, “Computational design of high-level interlocking puzzles,” ACM Transactions on Graphics, vol. 41, no. 4. Association for Computing Machinery, 2022.","short":"R. Chen, Z. Wang, P. Song, B. Bickel, ACM Transactions on Graphics 41 (2022).","apa":"Chen, R., Wang, Z., Song, P., & Bickel, B. (2022). Computational design of high-level interlocking puzzles. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3528223.3530071","ama":"Chen R, Wang Z, Song P, Bickel B. Computational design of high-level interlocking puzzles. ACM Transactions on Graphics. 2022;41(4). doi:10.1145/3528223.3530071","chicago":"Chen, Rulin, Ziqi Wang, Peng Song, and Bernd Bickel. “Computational Design of High-Level Interlocking Puzzles.” ACM Transactions on Graphics. Association for Computing Machinery, 2022. https://doi.org/10.1145/3528223.3530071.","ista":"Chen R, Wang Z, Song P, Bickel B. 2022. Computational design of high-level interlocking puzzles. ACM Transactions on Graphics. 41(4), 150."},"project":[{"grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425"}],"article_number":"150","ec_funded":1,"volume":41,"issue":"4","related_material":{"link":[{"description":"News on ISTA website","url":"https://ista.ac.at/en/news/unlocking-interlocking-riddles/","relation":"press_release"}]},"language":[{"iso":"eng"}],"file":[{"file_id":"11992","checksum":"0b51651be45b1b33f2072bd5d2686c69","success":1,"content_type":"application/pdf","access_level":"open_access","relation":"main_file","date_created":"2022-08-28T07:56:19Z","file_name":"Chen-2022-High-LevelPuzzle_authorVersion.pdf","date_updated":"2022-08-28T07:56:19Z","file_size":16896871,"creator":"bbickel"}],"publication_status":"published","publication_identifier":{"eissn":["1557-7368"],"issn":["0730-0301"]},"intvolume":" 41","month":"07","scopus_import":"1","oa_version":"Submitted Version","abstract":[{"lang":"eng","text":"Interlocking puzzles are intriguing geometric games where the puzzle pieces are held together based on their geometric arrangement, preventing the puzzle from falling apart. High-level-of-difficulty, or simply high-level, interlocking puzzles are a subclass of interlocking puzzles that require multiple moves to take out the first subassembly from the puzzle. Solving a high-level interlocking puzzle is a challenging task since one has to explore many different configurations of the puzzle pieces until reaching a configuration where the first subassembly can be taken out. Designing a high-level interlocking puzzle with a user-specified level of difficulty is even harder since the puzzle pieces have to be interlocking in all the configurations before the first subassembly is taken out.\r\n\r\nIn this paper, we present a computational approach to design high-level interlocking puzzles. The core idea is to represent all possible configurations of an interlocking puzzle as well as transitions among these configurations using a rooted, undirected graph called a disassembly graph and leverage this graph to find a disassembly plan that requires a minimal number of moves to take out the first subassembly from the puzzle. At the design stage, our algorithm iteratively constructs the geometry of each puzzle piece to expand the disassembly graph incrementally, aiming to achieve a user-specified level of difficulty. We show that our approach allows efficient generation of high-level interlocking puzzles of various shape complexities, including new solutions not attainable by state-of-the-art approaches."}],"department":[{"_id":"BeBi"}],"file_date_updated":"2022-08-28T07:56:19Z","ddc":["000"],"date_updated":"2023-08-03T13:21:22Z","status":"public","type":"journal_article","article_type":"original","_id":"11735"},{"publisher":"Wiley","quality_controlled":"1","oa":1,"page":"435-452","doi":"10.1111/cgf.14581","date_published":"2022-09-01T00:00:00Z","date_created":"2022-08-28T18:17:01Z","isi":1,"has_accepted_license":"1","year":"2022","day":"01","publication":"Computer Graphics Forum","author":[{"first_name":"Thomas","full_name":"Alderighi, Thomas","last_name":"Alderighi"},{"last_name":"Malomo","full_name":"Malomo, Luigi","first_name":"Luigi"},{"id":"4718F954-F248-11E8-B48F-1D18A9856A87","first_name":"Thomas","full_name":"Auzinger, Thomas","orcid":"0000-0002-1546-3265","last_name":"Auzinger"},{"full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Paulo","full_name":"Cignoni, Paulo","last_name":"Cignoni"},{"first_name":"Nico","full_name":"Pietroni, Nico","last_name":"Pietroni"}],"article_processing_charge":"No","external_id":{"isi":["000842638900001"]},"title":"State of the art in computational mould design","citation":{"chicago":"Alderighi, Thomas, Luigi Malomo, Thomas Auzinger, Bernd Bickel, Paulo Cignoni, and Nico Pietroni. “State of the Art in Computational Mould Design.” Computer Graphics Forum. Wiley, 2022. https://doi.org/10.1111/cgf.14581.","ista":"Alderighi T, Malomo L, Auzinger T, Bickel B, Cignoni P, Pietroni N. 2022. State of the art in computational mould design. Computer Graphics Forum. 41(6), 435–452.","mla":"Alderighi, Thomas, et al. “State of the Art in Computational Mould Design.” Computer Graphics Forum, vol. 41, no. 6, Wiley, 2022, pp. 435–52, doi:10.1111/cgf.14581.","ieee":"T. Alderighi, L. Malomo, T. Auzinger, B. Bickel, P. Cignoni, and N. Pietroni, “State of the art in computational mould design,” Computer Graphics Forum, vol. 41, no. 6. Wiley, pp. 435–452, 2022.","short":"T. Alderighi, L. Malomo, T. Auzinger, B. Bickel, P. Cignoni, N. Pietroni, Computer Graphics Forum 41 (2022) 435–452.","apa":"Alderighi, T., Malomo, L., Auzinger, T., Bickel, B., Cignoni, P., & Pietroni, N. (2022). State of the art in computational mould design. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.14581","ama":"Alderighi T, Malomo L, Auzinger T, Bickel B, Cignoni P, Pietroni N. State of the art in computational mould design. Computer Graphics Forum. 2022;41(6):435-452. doi:10.1111/cgf.14581"},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","scopus_import":"1","month":"09","intvolume":" 41","abstract":[{"text":"Moulding refers to a set of manufacturing techniques in which a mould, usually a cavity or a solid frame, is used to shape a liquid or pliable material into an object of the desired shape. The popularity of moulding comes from its effectiveness, scalability and versatility in terms of employed materials. Its relevance as a fabrication process is demonstrated by the extensive literature covering different aspects related to mould design, from material flow simulation to the automation of mould geometry design. In this state-of-the-art report, we provide an extensive review of the automatic methods for the design of moulds, focusing on contributions from a geometric perspective. We classify existing mould design methods based on their computational approach and the nature of their target moulding process. We summarize the relationships between computational approaches and moulding techniques, highlighting their strengths and limitations. Finally, we discuss potential future research directions.","lang":"eng"}],"oa_version":"Submitted Version","issue":"6","volume":41,"publication_identifier":{"issn":["0167-7055"],"eissn":["1467-8659"]},"publication_status":"published","file":[{"file_id":"11994","checksum":"c40cc8ceb7b7f0512172b883d712198e","content_type":"application/pdf","description":"This is the pre-peer reviewed version of the following article: Alderighi, T., Malomo, L., Auzinger, T., Bickel, B., Cignoni, P. and Pietroni, N. (2022), State of the Art in Computational Mould Design. Computer Graphics Forum, which has been published in final form at https://doi.org/10.1111/cgf.14581. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.","access_level":"open_access","relation":"main_file","title":"pre-peer reviewed version","date_created":"2022-08-28T18:18:08Z","file_name":"star_molding_preprint.pdf","date_updated":"2022-08-28T18:18:08Z","file_size":32480850,"creator":"bbickel"}],"language":[{"iso":"eng"}],"type":"journal_article","article_type":"original","status":"public","keyword":["Computer Graphics and Computer-Aided Design"],"_id":"11993","department":[{"_id":"BeBi"}],"file_date_updated":"2022-08-28T18:18:08Z","date_updated":"2023-08-03T13:21:55Z","ddc":["000"]},{"department":[{"_id":"BeBi"}],"file_date_updated":"2023-01-30T10:48:37Z","ddc":["000"],"date_updated":"2023-10-31T08:40:55Z","status":"public","conference":{"start_date":"2022-11-21","location":"London, United Kingdom","end_date":"2022-11-24","name":"BMVC: British Machine Vision Conference"},"type":"conference","_id":"12452","language":[{"iso":"eng"}],"file":[{"file_name":"vorf_main.pdf","date_created":"2023-01-30T10:48:18Z","title":"VoRF: Volumetric Relightable Faces","creator":"bbickel","file_size":5202710,"date_updated":"2023-01-30T10:48:18Z","file_id":"12453","checksum":"b60b70bb48700aee709c85a69231821d","relation":"main_file","access_level":"open_access","content_type":"application/pdf"},{"file_id":"12454","checksum":"ce5f4ce66eaaa1590ee5df989fca6f61","relation":"supplementary_material","access_level":"open_access","content_type":"application/pdf","file_name":"vorf_supp.pdf","date_created":"2023-01-30T10:48:29Z","title":"VoRF: Volumetric Relightable Faces – SUPPLEMENTAL MATERIAL –","creator":"bbickel","file_size":37953188,"date_updated":"2023-01-30T10:48:29Z"},{"creator":"bbickel","date_updated":"2023-01-30T10:48:37Z","file_size":57855492,"date_created":"2023-01-30T10:48:37Z","file_name":"video.mp4","access_level":"open_access","relation":"supplementary_material","content_type":"video/mp4","checksum":"08aecca434b08fee75ee1efe87943718","file_id":"12455"}],"publication_status":"published","month":"12","main_file_link":[{"open_access":"1","url":"https://bmvc2022.mpi-inf.mpg.de/708/"}],"scopus_import":"1","oa_version":"Published Version","abstract":[{"lang":"eng","text":"Portrait viewpoint and illumination editing is an important problem with several applications in VR/AR, movies, and photography. Comprehensive knowledge of geometry and illumination is critical for obtaining photorealistic results. Current methods are unable to explicitly model in 3D while handing both viewpoint and illumination editing from a single image. In this paper, we propose VoRF, a novel approach that can take even a single portrait image as input and relight human heads under novel illuminations that can be viewed from arbitrary viewpoints. VoRF represents a human head as a continuous volumetric field and learns a prior model of human heads using a coordinate-based MLP with separate latent spaces for identity and illumination. The prior model is learnt in an auto-decoder manner over a diverse class of head shapes and appearances, allowing VoRF to generalize to novel test identities from a single input image. Additionally, VoRF has a reflectance MLP that uses the intermediate features of the prior model for rendering One-Light-at-A-Time (OLAT) images under novel views. We synthesize novel illuminations by combining these OLAT images with target environment maps. Qualitative and quantitative evaluations demonstrate the effectiveness of VoRF for relighting and novel view synthesis even when applied to unseen subjects under uncontrolled illuminations."}],"title":"VoRF: Volumetric Relightable Faces","article_processing_charge":"No","author":[{"first_name":"Pramod","last_name":"Rao","full_name":"Rao, Pramod"},{"first_name":"Mallikarjun","last_name":"B R","full_name":"B R, Mallikarjun"},{"first_name":"Gereon","full_name":"Fox, Gereon","last_name":"Fox"},{"first_name":"Tim","full_name":"Weyrich, Tim","last_name":"Weyrich"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd"},{"first_name":"Hans-Peter","full_name":"Seidel, Hans-Peter","last_name":"Seidel"},{"first_name":"Hanspeter","last_name":"Pfister","full_name":"Pfister, Hanspeter"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"},{"full_name":"Tewari, Ayush","last_name":"Tewari","first_name":"Ayush"},{"last_name":"Theobalt","full_name":"Theobalt, Christian","first_name":"Christian"},{"first_name":"Mohamed","last_name":"Elgharib","full_name":"Elgharib, Mohamed"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"ama":"Rao P, B R M, Fox G, et al. VoRF: Volumetric Relightable Faces. In: 33rd British Machine Vision Conference. British Machine Vision Association and Society for Pattern Recognition; 2022.","apa":"Rao, P., B R, M., Fox, G., Weyrich, T., Bickel, B., Seidel, H.-P., … Elgharib, M. (2022). VoRF: Volumetric Relightable Faces. In 33rd British Machine Vision Conference. London, United Kingdom: British Machine Vision Association and Society for Pattern Recognition.","short":"P. Rao, M. B R, G. Fox, T. Weyrich, B. Bickel, H.-P. Seidel, H. Pfister, W. Matusik, A. Tewari, C. Theobalt, M. Elgharib, in:, 33rd British Machine Vision Conference, British Machine Vision Association and Society for Pattern Recognition, 2022.","ieee":"P. Rao et al., “VoRF: Volumetric Relightable Faces,” in 33rd British Machine Vision Conference, London, United Kingdom, 2022.","mla":"Rao, Pramod, et al. “VoRF: Volumetric Relightable Faces.” 33rd British Machine Vision Conference, 708, British Machine Vision Association and Society for Pattern Recognition, 2022.","ista":"Rao P, B R M, Fox G, Weyrich T, Bickel B, Seidel H-P, Pfister H, Matusik W, Tewari A, Theobalt C, Elgharib M. 2022. VoRF: Volumetric Relightable Faces. 33rd British Machine Vision Conference. BMVC: British Machine Vision Conference, 708.","chicago":"Rao, Pramod, Mallikarjun B R, Gereon Fox, Tim Weyrich, Bernd Bickel, Hans-Peter Seidel, Hanspeter Pfister, et al. “VoRF: Volumetric Relightable Faces.” In 33rd British Machine Vision Conference. British Machine Vision Association and Society for Pattern Recognition, 2022."},"article_number":"708","date_created":"2023-01-30T10:47:06Z","date_published":"2022-12-01T00:00:00Z","publication":"33rd British Machine Vision Conference","day":"01","year":"2022","has_accepted_license":"1","oa":1,"publisher":"British Machine Vision Association and Society for Pattern Recognition","quality_controlled":"1","acknowledgement":"This work was supported by the ERC Consolidator Grant 4DReply (770784)."},{"type":"preprint","status":"public","_id":"11943","author":[{"id":"39BDC62C-F248-11E8-B48F-1D18A9856A87","first_name":"Philipp","orcid":"0000-0002-2340-7431","full_name":"Velicky, Philipp","last_name":"Velicky"},{"last_name":"Miguel Villalba","full_name":"Miguel Villalba, Eder","orcid":"0000-0001-5665-0430","id":"3FB91342-F248-11E8-B48F-1D18A9856A87","first_name":"Eder"},{"first_name":"Julia M","id":"443DB6DE-F248-11E8-B48F-1D18A9856A87","full_name":"Michalska, Julia M","orcid":"0000-0003-3862-1235","last_name":"Michalska"},{"last_name":"Wei","full_name":"Wei, Donglai","first_name":"Donglai"},{"full_name":"Lin, Zudi","last_name":"Lin","first_name":"Zudi"},{"full_name":"Watson, Jake","orcid":"0000-0002-8698-3823","last_name":"Watson","first_name":"Jake","id":"63836096-4690-11EA-BD4E-32803DDC885E"},{"first_name":"Jakob","full_name":"Troidl, Jakob","last_name":"Troidl"},{"first_name":"Johanna","full_name":"Beyer, Johanna","last_name":"Beyer"},{"last_name":"Ben Simon","full_name":"Ben Simon, Yoav","id":"43DF3136-F248-11E8-B48F-1D18A9856A87","first_name":"Yoav"},{"id":"4DF26D8C-F248-11E8-B48F-1D18A9856A87","first_name":"Christoph M","last_name":"Sommer","orcid":"0000-0003-1216-9105","full_name":"Sommer, Christoph M"},{"first_name":"Wiebke","id":"425C1CE8-F248-11E8-B48F-1D18A9856A87","full_name":"Jahr, Wiebke","last_name":"Jahr"},{"full_name":"Cenameri, Alban","last_name":"Cenameri","first_name":"Alban","id":"9ac8f577-2357-11eb-997a-e566c5550886"},{"first_name":"Johannes","last_name":"Broichhagen","full_name":"Broichhagen, Johannes"},{"full_name":"Grant, Seth G. N.","last_name":"Grant","first_name":"Seth G. N."},{"id":"353C1B58-F248-11E8-B48F-1D18A9856A87","first_name":"Peter M","orcid":"0000-0001-5001-4804","full_name":"Jonas, Peter M","last_name":"Jonas"},{"first_name":"Gaia","id":"3E57A680-F248-11E8-B48F-1D18A9856A87","full_name":"Novarino, Gaia","orcid":"0000-0002-7673-7178","last_name":"Novarino"},{"last_name":"Pfister","full_name":"Pfister, Hanspeter","first_name":"Hanspeter"},{"last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"id":"42EFD3B6-F248-11E8-B48F-1D18A9856A87","first_name":"Johann G","last_name":"Danzl","orcid":"0000-0001-8559-3973","full_name":"Danzl, Johann G"}],"article_processing_charge":"No","department":[{"_id":"PeJo"},{"_id":"GaNo"},{"_id":"BeBi"},{"_id":"JoDa"}],"title":"Saturated reconstruction of living brain tissue","citation":{"apa":"Velicky, P., Miguel Villalba, E., Michalska, J. M., Wei, D., Lin, Z., Watson, J., … Danzl, J. G. (n.d.). Saturated reconstruction of living brain tissue. bioRxiv. Cold Spring Harbor Laboratory. https://doi.org/10.1101/2022.03.16.484431","ama":"Velicky P, Miguel Villalba E, Michalska JM, et al. Saturated reconstruction of living brain tissue. bioRxiv. doi:10.1101/2022.03.16.484431","short":"P. Velicky, E. Miguel Villalba, J.M. Michalska, D. Wei, Z. Lin, J. Watson, J. Troidl, J. Beyer, Y. Ben Simon, C.M. Sommer, W. Jahr, A. Cenameri, J. Broichhagen, S.G.N. Grant, P.M. Jonas, G. Novarino, H. Pfister, B. Bickel, J.G. Danzl, BioRxiv (n.d.).","ieee":"P. Velicky et al., “Saturated reconstruction of living brain tissue,” bioRxiv. Cold Spring Harbor Laboratory.","mla":"Velicky, Philipp, et al. “Saturated Reconstruction of Living Brain Tissue.” BioRxiv, Cold Spring Harbor Laboratory, doi:10.1101/2022.03.16.484431.","ista":"Velicky P, Miguel Villalba E, Michalska JM, Wei D, Lin Z, Watson J, Troidl J, Beyer J, Ben Simon Y, Sommer CM, Jahr W, Cenameri A, Broichhagen J, Grant SGN, Jonas PM, Novarino G, Pfister H, Bickel B, Danzl JG. Saturated reconstruction of living brain tissue. bioRxiv, 10.1101/2022.03.16.484431.","chicago":"Velicky, Philipp, Eder Miguel Villalba, Julia M Michalska, Donglai Wei, Zudi Lin, Jake Watson, Jakob Troidl, et al. “Saturated Reconstruction of Living Brain Tissue.” BioRxiv. Cold Spring Harbor Laboratory, n.d. https://doi.org/10.1101/2022.03.16.484431."},"date_updated":"2024-03-27T23:30:20Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publisher":"Cold Spring Harbor Laboratory","main_file_link":[{"url":"https://doi.org/10.1101/2022.03.16.484431","open_access":"1"}],"oa":1,"month":"05","abstract":[{"lang":"eng","text":"Complex wiring between neurons underlies the information-processing network enabling all brain functions, including cognition and memory. For understanding how the network is structured, processes information, and changes over time, comprehensive visualization of the architecture of living brain tissue with its cellular and molecular components would open up major opportunities. However, electron microscopy (EM) provides nanometre-scale resolution required for full in-silico reconstruction1–5, yet is limited to fixed specimens and static representations. Light microscopy allows live observation, with super-resolution approaches6–12 facilitating nanoscale visualization, but comprehensive 3D-reconstruction of living brain tissue has been hindered by tissue photo-burden, photobleaching, insufficient 3D-resolution, and inadequate signal-to-noise ratio (SNR). Here we demonstrate saturated reconstruction of living brain tissue. We developed an integrated imaging and analysis technology, adapting stimulated emission depletion (STED) microscopy6,13 in extracellularly labelled tissue14 for high SNR and near-isotropic resolution. Centrally, a two-stage deep-learning approach leveraged previously obtained information on sample structure to drastically reduce photo-burden and enable automated volumetric reconstruction down to single synapse level. Live reconstruction provides unbiased analysis of tissue architecture across time in relation to functional activity and targeted activation, and contextual understanding of molecular labelling. This adoptable technology will facilitate novel insights into the dynamic functional architecture of living brain tissue."}],"oa_version":"Preprint","related_material":{"record":[{"relation":"dissertation_contains","status":"public","id":"12470"}]},"date_published":"2022-05-09T00:00:00Z","doi":"10.1101/2022.03.16.484431","date_created":"2022-08-23T11:07:59Z","year":"2022","publication_status":"submitted","day":"09","language":[{"iso":"eng"}],"publication":"bioRxiv"},{"department":[{"_id":"BeBi"}],"file_date_updated":"2021-10-18T07:36:03Z","date_updated":"2021-10-19T19:29:06Z","ddc":["000"],"type":"conference","conference":{"name":"UIST: User Interface Software and Technology","start_date":"2021-10-10","end_date":"2021-10-14","location":"Virtual"},"status":"public","_id":"10148","ec_funded":1,"publication_identifier":{"isbn":["978-1-4503-8635-7"]},"publication_status":"published","file":[{"date_created":"2021-10-18T07:36:03Z","file_name":"degraen-UIST2021_Texture_Appropriation_CR_preprint.pdf","date_updated":"2021-10-18T07:36:03Z","file_size":29796364,"creator":"bbickel","file_id":"10149","checksum":"b0b26464df79b3a59e8ed82e4e19ab15","content_type":"application/pdf","access_level":"open_access","relation":"main_file"}],"language":[{"iso":"eng"}],"month":"10","abstract":[{"text":"Tactile feedback of an object’s surface enables us to discern its material properties and affordances. This understanding is used in digital fabrication processes by creating objects with high-resolution surface variations to influence a user’s tactile perception. As the design of such surface haptics commonly relies on knowledge from real-life experiences, it is unclear how to adapt this information for digital design methods. In this work, we investigate replicating the haptics of real materials. Using an existing process for capturing an object’s microgeometry, we digitize and reproduce the stable surface information of a set of 15 fabric samples. In a psychophysical experiment, we evaluate the tactile qualities of our set of original samples and their replicas. From our results, we see that direct reproduction of surface variations is able to influence different psychophysical dimensions of the tactile perception of surface textures. While the fabrication process did not preserve all properties, our approach underlines that replication of surface microgeometries benefits fabrication methods in terms of haptic perception by covering a large range of tactile variations. Moreover, by changing the surface structure of a single fabricated material, its material perception can be influenced. We conclude by proposing strategies for capturing and reproducing digitized textures to better resemble the perceived haptics of the originals.","lang":"eng"}],"oa_version":"Preprint","author":[{"full_name":"Degraen, Donald","last_name":"Degraen","first_name":"Donald"},{"first_name":"Michael","id":"62E473F4-5C99-11EA-A40E-AF823DDC885E","full_name":"Piovarci, Michael","last_name":"Piovarci"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385"},{"first_name":"Antonio","last_name":"Kruger","full_name":"Kruger, Antonio"}],"article_processing_charge":"No","title":"Capturing tactile properties of real surfaces for haptic reproduction","citation":{"mla":"Degraen, Donald, et al. “Capturing Tactile Properties of Real Surfaces for Haptic Reproduction.” 34th Annual ACM Symposium, Association for Computing Machinery, 2021, pp. 954–71, doi:10.1145/3472749.3474798.","apa":"Degraen, D., Piovarci, M., Bickel, B., & Kruger, A. (2021). Capturing tactile properties of real surfaces for haptic reproduction. In 34th Annual ACM Symposium (pp. 954–971). Virtual: Association for Computing Machinery. https://doi.org/10.1145/3472749.3474798","ama":"Degraen D, Piovarci M, Bickel B, Kruger A. Capturing tactile properties of real surfaces for haptic reproduction. In: 34th Annual ACM Symposium. Association for Computing Machinery; 2021:954-971. doi:10.1145/3472749.3474798","short":"D. Degraen, M. Piovarci, B. Bickel, A. Kruger, in:, 34th Annual ACM Symposium, Association for Computing Machinery, 2021, pp. 954–971.","ieee":"D. Degraen, M. Piovarci, B. Bickel, and A. Kruger, “Capturing tactile properties of real surfaces for haptic reproduction,” in 34th Annual ACM Symposium, Virtual, 2021, pp. 954–971.","chicago":"Degraen, Donald, Michael Piovarci, Bernd Bickel, and Antonio Kruger. “Capturing Tactile Properties of Real Surfaces for Haptic Reproduction.” In 34th Annual ACM Symposium, 954–71. Association for Computing Machinery, 2021. https://doi.org/10.1145/3472749.3474798.","ista":"Degraen D, Piovarci M, Bickel B, Kruger A. 2021. Capturing tactile properties of real surfaces for haptic reproduction. 34th Annual ACM Symposium. UIST: User Interface Software and Technology, 954–971."},"user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","project":[{"grant_number":"642841","name":"Distributed 3D Object Design","call_identifier":"H2020","_id":"2508E324-B435-11E9-9278-68D0E5697425"}],"page":"954-971","date_published":"2021-10-10T00:00:00Z","doi":"10.1145/3472749.3474798","date_created":"2021-10-18T07:36:11Z","has_accepted_license":"1","year":"2021","day":"10","publication":"34th Annual ACM Symposium","quality_controlled":"1","publisher":"Association for Computing Machinery","oa":1,"acknowledgement":"Our gratitude goes out to Kamila Mushkina, Akhmajon Makhsadov, Jordan Espenshade, Bruno Fruchard, Roland Bennewitz, and Robert Drumm. This project has received funding from the EU’s Horizon 2020 research and innovation programme, under the Marie Skłodowska-Curie grant agreement No 642841 (DISTRO)."},{"isi":1,"has_accepted_license":"1","year":"2021","day":"01","publication":"Optics Express","page":"7568-7588","doi":"10.1364/OE.406095","date_published":"2021-03-01T00:00:00Z","date_created":"2021-03-14T23:01:33Z","acknowledgement":"H2020 Marie Skłodowska-Curie Actions (642841); European Research Council (715767); Grantová Agentura České Republiky (16-08111S, 16-18964S); Univerzita Karlova v Praze (SVV-2017-260452); Engineering and Physical Sciences Research Council (EP/K023578/1).\r\nWe are grateful to Stratasys Ltd. for access to the voxel-level print interface of the J750\r\nmachine.","publisher":"The Optical Society","quality_controlled":"1","oa":1,"citation":{"chicago":"Elek, Oskar, Ran Zhang, Denis Sumin, Karol Myszkowski, Bernd Bickel, Alexander Wilkie, Jaroslav Křivánek, and Tim Weyrich. “Robust and Practical Measurement of Volume Transport Parameters in Solid Photo-Polymer Materials for 3D Printing.” Optics Express. The Optical Society, 2021. https://doi.org/10.1364/OE.406095.","ista":"Elek O, Zhang R, Sumin D, Myszkowski K, Bickel B, Wilkie A, Křivánek J, Weyrich T. 2021. Robust and practical measurement of volume transport parameters in solid photo-polymer materials for 3D printing. Optics Express. 29(5), 7568–7588.","mla":"Elek, Oskar, et al. “Robust and Practical Measurement of Volume Transport Parameters in Solid Photo-Polymer Materials for 3D Printing.” Optics Express, vol. 29, no. 5, The Optical Society, 2021, pp. 7568–88, doi:10.1364/OE.406095.","ieee":"O. Elek et al., “Robust and practical measurement of volume transport parameters in solid photo-polymer materials for 3D printing,” Optics Express, vol. 29, no. 5. The Optical Society, pp. 7568–7588, 2021.","short":"O. Elek, R. Zhang, D. Sumin, K. Myszkowski, B. Bickel, A. Wilkie, J. Křivánek, T. Weyrich, Optics Express 29 (2021) 7568–7588.","apa":"Elek, O., Zhang, R., Sumin, D., Myszkowski, K., Bickel, B., Wilkie, A., … Weyrich, T. (2021). Robust and practical measurement of volume transport parameters in solid photo-polymer materials for 3D printing. Optics Express. The Optical Society. https://doi.org/10.1364/OE.406095","ama":"Elek O, Zhang R, Sumin D, et al. Robust and practical measurement of volume transport parameters in solid photo-polymer materials for 3D printing. Optics Express. 2021;29(5):7568-7588. doi:10.1364/OE.406095"},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","author":[{"first_name":"Oskar","full_name":"Elek, Oskar","last_name":"Elek"},{"id":"4DDBCEB0-F248-11E8-B48F-1D18A9856A87","first_name":"Ran","last_name":"Zhang","full_name":"Zhang, Ran","orcid":"0000-0002-3808-281X"},{"first_name":"Denis","last_name":"Sumin","full_name":"Sumin, Denis"},{"last_name":"Myszkowski","full_name":"Myszkowski, Karol","first_name":"Karol"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd"},{"first_name":"Alexander","full_name":"Wilkie, Alexander","last_name":"Wilkie"},{"first_name":"Jaroslav","last_name":"Křivánek","full_name":"Křivánek, Jaroslav"},{"first_name":"Tim","last_name":"Weyrich","full_name":"Weyrich, Tim"}],"article_processing_charge":"No","external_id":{"isi":["000624968100103"]},"title":"Robust and practical measurement of volume transport parameters in solid photo-polymer materials for 3D printing","project":[{"_id":"2508E324-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"642841","name":"Distributed 3D Object Design"},{"grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"publication_identifier":{"eissn":["1094-4087"]},"publication_status":"published","file":[{"file_id":"9269","checksum":"a9697ad83136c19ad87e46aa2db63cfd","success":1,"access_level":"open_access","relation":"main_file","content_type":"application/pdf","date_created":"2021-03-22T08:15:28Z","file_name":"2021_OpticsExpress_Elek.pdf","creator":"dernst","date_updated":"2021-03-22T08:15:28Z","file_size":10873700}],"language":[{"iso":"eng"}],"issue":"5","volume":29,"ec_funded":1,"abstract":[{"lang":"eng","text":"Volumetric light transport is a pervasive physical phenomenon, and therefore its accurate simulation is important for a broad array of disciplines. While suitable mathematical models for computing the transport are now available, obtaining the necessary material parameters needed to drive such simulations is a challenging task: direct measurements of these parameters from material samples are seldom possible. Building on the inverse scattering paradigm, we present a novel measurement approach which indirectly infers the transport parameters from extrinsic observations of multiple-scattered radiance. The novelty of the proposed approach lies in replacing structured illumination with a structured reflector bonded to the sample, and a robust fitting procedure that largely compensates for potential systematic errors in the calibration of the setup. We show the feasibility of our approach by validating simulations of complex 3D compositions of the measured materials against physical prints, using photo-polymer resins. As presented in this paper, our technique yields colorspace data suitable for accurate appearance reproduction in the area of 3D printing. Beyond that, and without fundamental changes to the basic measurement methodology, it could equally well be used to obtain spectral measurements that are useful for other application areas."}],"oa_version":"Published Version","scopus_import":"1","month":"03","intvolume":" 29","date_updated":"2023-08-07T14:11:57Z","ddc":["000"],"department":[{"_id":"BeBi"}],"file_date_updated":"2021-03-22T08:15:28Z","_id":"9241","type":"journal_article","article_type":"original","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"status":"public"},{"project":[{"_id":"2508E324-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"642841","name":"Distributed 3D Object Design"},{"name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767","_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"article_number":"186","author":[{"last_name":"Zhang","full_name":"Zhang, Ran","orcid":"0000-0002-3808-281X","first_name":"Ran","id":"4DDBCEB0-F248-11E8-B48F-1D18A9856A87"},{"id":"4718F954-F248-11E8-B48F-1D18A9856A87","first_name":"Thomas","orcid":"0000-0002-1546-3265","full_name":"Auzinger, Thomas","last_name":"Auzinger"},{"last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"}],"article_processing_charge":"No","external_id":{"isi":["000752079300003"]},"title":"Computational design of planar multistable compliant structures","citation":{"chicago":"Zhang, Ran, Thomas Auzinger, and Bernd Bickel. “Computational Design of Planar Multistable Compliant Structures.” ACM Transactions on Graphics. Association for Computing Machinery, 2021. https://doi.org/10.1145/3453477.","ista":"Zhang R, Auzinger T, Bickel B. 2021. Computational design of planar multistable compliant structures. ACM Transactions on Graphics. 40(5), 186.","mla":"Zhang, Ran, et al. “Computational Design of Planar Multistable Compliant Structures.” ACM Transactions on Graphics, vol. 40, no. 5, 186, Association for Computing Machinery, 2021, doi:10.1145/3453477.","ama":"Zhang R, Auzinger T, Bickel B. Computational design of planar multistable compliant structures. ACM Transactions on Graphics. 2021;40(5). doi:10.1145/3453477","apa":"Zhang, R., Auzinger, T., & Bickel, B. (2021). Computational design of planar multistable compliant structures. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3453477","ieee":"R. Zhang, T. Auzinger, and B. Bickel, “Computational design of planar multistable compliant structures,” ACM Transactions on Graphics, vol. 40, no. 5. Association for Computing Machinery, 2021.","short":"R. Zhang, T. Auzinger, B. Bickel, ACM Transactions on Graphics 40 (2021)."},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","quality_controlled":"1","publisher":"Association for Computing Machinery","oa":1,"acknowledgement":"We would like to thank everyone who contributed to this paper, the authors of artworks for all the examples, including @macrovec-tor_official and Wikimedia for the FLAG semaphore, and @pikisuper-star for the FIGURINE. The photos of iconic poses in the teaser were supplied by (from left to right): Mike Hewitt/Olympics Day 8 - Athletics/Gettty Images, Oneinchpunch/Basketball player training on acourt in New york city/Shutterstock, and Andrew Redington/TigerWoods/Getty Images. We also want to express our gratitude to Christian Hafner for insightful discussions, the IST Austria machine shop SSU, all proof-readers, and anonymous reviewers. This project has received funding from the European Union’s Horizon 2020 research and innovation programme, under the Marie Skłodowska-Curie grant agreement No 642841 (DISTRO), and under the European Research Council grant agreement No 715767 (MATERIALIZABLE).","doi":"10.1145/3453477","date_published":"2021-10-08T00:00:00Z","date_created":"2021-05-08T17:37:08Z","isi":1,"has_accepted_license":"1","year":"2021","day":"08","publication":"ACM Transactions on Graphics","type":"journal_article","article_type":"original","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"status":"public","keyword":["multistability","mechanism","computational design","rigidity"],"_id":"9376","file_date_updated":"2021-12-17T08:13:51Z","department":[{"_id":"BeBi"}],"date_updated":"2023-08-08T13:31:38Z","ddc":["000"],"month":"10","intvolume":" 40","acknowledged_ssus":[{"_id":"M-Shop"}],"abstract":[{"lang":"eng","text":"This paper presents a method for designing planar multistable compliant structures. Given a sequence of desired stable states and the corresponding poses of the structure, we identify the topology and geometric realization of a mechanism—consisting of bars and joints—that is able to physically reproduce the desired multistable behavior. In order to solve this problem efficiently, we build on insights from minimally rigid graph theory to identify simple but effective topologies for the mechanism. We then optimize its geometric parameters, such as joint positions and bar lengths, to obtain correct transitions between the given poses. Simultaneously, we ensure adequate stability of each pose based on an effective approximate error metric related to the elastic energy Hessian of the bars in the mechanism. As demonstrated by our results, we obtain functional multistable mechanisms of manageable complexity that can be fabricated using 3D printing. Further, we evaluated the effectiveness of our method on a large number of examples in the simulation and fabricated several physical prototypes."}],"oa_version":"Published Version","volume":40,"issue":"5","ec_funded":1,"publication_identifier":{"eissn":["1557-7368"],"issn":["0730-0301"]},"publication_status":"published","file":[{"date_created":"2021-05-08T17:36:59Z","file_name":"Multistable-authorversion.pdf","creator":"bbickel","date_updated":"2021-05-08T17:36:59Z","file_size":18926557,"checksum":"8564b3118457d4c8939a8ef2b1a2f16c","file_id":"9377","access_level":"open_access","relation":"main_file","content_type":"application/pdf"},{"relation":"main_file","access_level":"open_access","content_type":"video/mp4","success":1,"checksum":"3b6e874e30bfa1bfc3ad3498710145a1","file_id":"9378","creator":"bbickel","file_size":76542901,"date_updated":"2021-05-08T17:38:22Z","file_name":"multistable-video.mp4","date_created":"2021-05-08T17:38:22Z"},{"file_id":"10562","checksum":"20dc3bc42e1a912a5b0247c116772098","access_level":"open_access","relation":"supplementary_material","content_type":"application/pdf","description":"This document provides additional results and analyzes the robustness and limitations of our approach.","title":"Supplementary Material for “Computational Design of Planar Multistable Compliant Structures”","date_created":"2021-12-17T08:13:51Z","file_name":"multistable-supplementary material.pdf","creator":"bbickel","date_updated":"2021-12-17T08:13:51Z","file_size":3367072}],"language":[{"iso":"eng"}]},{"oa_version":"Published Version","pmid":1,"abstract":[{"lang":"eng","text":"We present a computational design system that assists users to model, optimize, and fabricate quad-robots with soft skins. Our system addresses the challenging task of predicting their physical behavior by fully integrating the multibody dynamics of the mechanical skeleton and the elastic behavior of the soft skin. The developed motion control strategy uses an alternating optimization scheme to avoid expensive full space time-optimization, interleaving space-time optimization for the skeleton, and frame-by-frame optimization for the full dynamics. The output are motor torques to drive the robot to achieve a user prescribed motion trajectory. We also provide a collection of convenient engineering tools and empirical manufacturing guidance to support the fabrication of the designed quad-robot. We validate the feasibility of designs generated with our system through physics simulations and with a physically-fabricated prototype."}],"month":"06","intvolume":" 27","scopus_import":"1","file":[{"date_updated":"2021-05-25T15:08:49Z","file_size":6183002,"creator":"kschuh","date_created":"2021-05-25T15:08:49Z","file_name":"2021_TVCG_Feng.pdf","content_type":"application/pdf","access_level":"open_access","relation":"main_file","file_id":"9427","checksum":"a78e6ac94e33ade4ffaea66943d5f7dc","success":1}],"language":[{"iso":"eng"}],"publication_identifier":{"issn":["19410506"],"eissn":["10772626"]},"publication_status":"published","issue":"6","volume":27,"ec_funded":1,"_id":"9408","status":"public","type":"journal_article","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"ddc":["000"],"date_updated":"2023-08-08T13:45:46Z","file_date_updated":"2021-05-25T15:08:49Z","department":[{"_id":"BeBi"}],"acknowledgement":"The authors would like to thank anonymous reviewers for their constructive comments. Weiwei Xu is partially supported by Zhejiang Lab. Yin Yang is partially spported by NSF under Grant Nos. CHS 1845024 and 1717972. Weiwei Xu and Hujun Bao are supported by Fundamental Research Funds for the Central Universities. This project has received funding from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme (Grant agreement No 715767).","quality_controlled":"1","publisher":"IEEE","oa":1,"day":"01","publication":"IEEE Transactions on Visualization and Computer Graphics","has_accepted_license":"1","isi":1,"year":"2021","date_published":"2021-06-01T00:00:00Z","doi":"10.1109/TVCG.2019.2957218","date_created":"2021-05-23T22:01:42Z","article_number":"2881-2895","project":[{"_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"mla":"Feng, Xudong, et al. “Computational Design of Skinned Quad-Robots.” IEEE Transactions on Visualization and Computer Graphics, vol. 27, no. 6, 2881–2895, IEEE, 2021, doi:10.1109/TVCG.2019.2957218.","ama":"Feng X, Liu J, Wang H, et al. Computational design of skinned Quad-Robots. IEEE Transactions on Visualization and Computer Graphics. 2021;27(6). doi:10.1109/TVCG.2019.2957218","apa":"Feng, X., Liu, J., Wang, H., Yang, Y., Bao, H., Bickel, B., & Xu, W. (2021). Computational design of skinned Quad-Robots. IEEE Transactions on Visualization and Computer Graphics. IEEE. https://doi.org/10.1109/TVCG.2019.2957218","short":"X. Feng, J. Liu, H. Wang, Y. Yang, H. Bao, B. Bickel, W. Xu, IEEE Transactions on Visualization and Computer Graphics 27 (2021).","ieee":"X. Feng et al., “Computational design of skinned Quad-Robots,” IEEE Transactions on Visualization and Computer Graphics, vol. 27, no. 6. IEEE, 2021.","chicago":"Feng, Xudong, Jiafeng Liu, Huamin Wang, Yin Yang, Hujun Bao, Bernd Bickel, and Weiwei Xu. “Computational Design of Skinned Quad-Robots.” IEEE Transactions on Visualization and Computer Graphics. IEEE, 2021. https://doi.org/10.1109/TVCG.2019.2957218.","ista":"Feng X, Liu J, Wang H, Yang Y, Bao H, Bickel B, Xu W. 2021. Computational design of skinned Quad-Robots. IEEE Transactions on Visualization and Computer Graphics. 27(6), 2881–2895."},"title":"Computational design of skinned Quad-Robots","author":[{"first_name":"Xudong","full_name":"Feng, Xudong","last_name":"Feng"},{"first_name":"Jiafeng","last_name":"Liu","full_name":"Liu, Jiafeng"},{"last_name":"Wang","full_name":"Wang, Huamin","first_name":"Huamin"},{"full_name":"Yang, Yin","last_name":"Yang","first_name":"Yin"},{"full_name":"Bao, Hujun","last_name":"Bao","first_name":"Hujun"},{"full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Weiwei","last_name":"Xu","full_name":"Xu, Weiwei"}],"article_processing_charge":"No","external_id":{"isi":["000649620700009"],"pmid":["31804937"]}},{"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"type":"journal_article","article_type":"original","status":"public","_id":"9819","department":[{"_id":"BeBi"}],"file_date_updated":"2021-08-09T11:41:50Z","date_updated":"2023-08-10T14:25:08Z","ddc":["000"],"scopus_import":"1","intvolume":" 40","month":"08","abstract":[{"lang":"eng","text":"Photorealistic editing of head portraits is a challenging task as humans are very sensitive to inconsistencies in faces. We present an approach for high-quality intuitive editing of the camera viewpoint and scene illumination (parameterised with an environment map) in a portrait image. This requires our method to capture and control the full reflectance field of the person in the image. Most editing approaches rely on supervised learning using training data captured with setups such as light and camera stages. Such datasets are expensive to acquire, not readily available and do not capture all the rich variations of in-the-wild portrait images. In addition, most supervised approaches only focus on relighting, and do not allow camera viewpoint editing. Thus, they only capture and control a subset of the reflectance field. Recently, portrait editing has been demonstrated by operating in the generative model space of StyleGAN. While such approaches do not require direct supervision, there is a significant loss of quality when compared to the supervised approaches. In this paper, we present a method which learns from limited supervised training data. The training images only include people in a fixed neutral expression with eyes closed, without much hair or background variations. Each person is captured under 150 one-light-at-a-time conditions and under 8 camera poses. Instead of training directly in the image space, we design a supervised problem which learns transformations in the latent space of StyleGAN. This combines the best of supervised learning and generative adversarial modeling. We show that the StyleGAN prior allows for generalisation to different expressions, hairstyles and backgrounds. This produces high-quality photorealistic results for in-the-wild images and significantly outperforms existing methods. Our approach can edit the illumination and pose simultaneously, and runs at interactive rates."}],"oa_version":"Published Version","volume":40,"issue":"4","publication_status":"published","publication_identifier":{"issn":["07300301"],"eissn":["15577368"]},"language":[{"iso":"eng"}],"file":[{"file_name":"2021_ACMTransactionsOnGraphics_Mallikarjun.pdf","date_created":"2021-08-09T11:41:50Z","file_size":49840741,"date_updated":"2021-08-09T11:41:50Z","creator":"asandaue","success":1,"checksum":"51b61b7e5c175e2d7ed8fa3b35f7525a","file_id":"9834","content_type":"application/pdf","relation":"main_file","access_level":"open_access"}],"article_number":"44","external_id":{"arxiv":["2103.07658"],"isi":["000674930900011"]},"article_processing_charge":"Yes (in subscription journal)","author":[{"full_name":"Mallikarjun, B. R.","last_name":"Mallikarjun","first_name":"B. R."},{"first_name":"Ayush","last_name":"Tewari","full_name":"Tewari, Ayush"},{"first_name":"Abdallah","last_name":"Dib","full_name":"Dib, Abdallah"},{"last_name":"Weyrich","full_name":"Weyrich, Tim","first_name":"Tim"},{"last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Seidel, Hans Peter","last_name":"Seidel","first_name":"Hans Peter"},{"first_name":"Hanspeter","full_name":"Pfister, Hanspeter","last_name":"Pfister"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"},{"last_name":"Chevallier","full_name":"Chevallier, Louis","first_name":"Louis"},{"last_name":"Elgharib","full_name":"Elgharib, Mohamed A.","first_name":"Mohamed A."},{"last_name":"Theobalt","full_name":"Theobalt, Christian","first_name":"Christian"}],"title":"PhotoApp: Photorealistic appearance editing of head portraits","citation":{"mla":"Mallikarjun, B. R., et al. “PhotoApp: Photorealistic Appearance Editing of Head Portraits.” ACM Transactions on Graphics, vol. 40, no. 4, 44, Association for Computing Machinery, 2021, doi:10.1145/3450626.3459765.","ama":"Mallikarjun BR, Tewari A, Dib A, et al. PhotoApp: Photorealistic appearance editing of head portraits. ACM Transactions on Graphics. 2021;40(4). doi:10.1145/3450626.3459765","apa":"Mallikarjun, B. R., Tewari, A., Dib, A., Weyrich, T., Bickel, B., Seidel, H. P., … Theobalt, C. (2021). PhotoApp: Photorealistic appearance editing of head portraits. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3450626.3459765","ieee":"B. R. Mallikarjun et al., “PhotoApp: Photorealistic appearance editing of head portraits,” ACM Transactions on Graphics, vol. 40, no. 4. Association for Computing Machinery, 2021.","short":"B.R. Mallikarjun, A. Tewari, A. Dib, T. Weyrich, B. Bickel, H.P. Seidel, H. Pfister, W. Matusik, L. Chevallier, M.A. Elgharib, C. Theobalt, ACM Transactions on Graphics 40 (2021).","chicago":"Mallikarjun, B. R., Ayush Tewari, Abdallah Dib, Tim Weyrich, Bernd Bickel, Hans Peter Seidel, Hanspeter Pfister, et al. “PhotoApp: Photorealistic Appearance Editing of Head Portraits.” ACM Transactions on Graphics. Association for Computing Machinery, 2021. https://doi.org/10.1145/3450626.3459765.","ista":"Mallikarjun BR, Tewari A, Dib A, Weyrich T, Bickel B, Seidel HP, Pfister H, Matusik W, Chevallier L, Elgharib MA, Theobalt C. 2021. PhotoApp: Photorealistic appearance editing of head portraits. ACM Transactions on Graphics. 40(4), 44."},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","oa":1,"publisher":"Association for Computing Machinery","quality_controlled":"1","acknowledgement":"This work was supported by the ERC Consolidator Grant 4DReply (770784). We also acknowledge support from Technicolor and InterDigital. We thank Tiancheng Sun for kindly helping us with the comparisons with Sun et al. [2019].","date_created":"2021-08-08T22:01:27Z","doi":"10.1145/3450626.3459765","date_published":"2021-08-01T00:00:00Z","year":"2021","isi":1,"has_accepted_license":"1","publication":"ACM Transactions on Graphics","day":"01"},{"isi":1,"has_accepted_license":"1","year":"2021","day":"01","publication":"Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition","page":"4791-4800","doi":"10.1109/CVPR46437.2021.00476","date_published":"2021-09-01T00:00:00Z","date_created":"2021-08-24T06:03:00Z","acknowledgement":"We thank Tarun Yenamandra and Duarte David for helping us with the comparisons. This work was supported by the\r\nERC Consolidator Grant 4DReply (770784). We also acknowledge support from InterDigital.","publisher":"IEEE","quality_controlled":"1","oa":1,"citation":{"mla":"B R, Mallikarjun, et al. “Monocular Reconstruction of Neural Face Reflectance Fields.” Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition, IEEE, 2021, pp. 4791–800, doi:10.1109/CVPR46437.2021.00476.","apa":"B R, M., Tewari, A., Oh, T.-H., Weyrich, T., Bickel, B., Seidel, H.-P., … Theobalt, C. (2021). Monocular reconstruction of neural face reflectance fields. In Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition (pp. 4791–4800). Nashville, TN, United States; Virtual: IEEE. https://doi.org/10.1109/CVPR46437.2021.00476","ama":"B R M, Tewari A, Oh T-H, et al. Monocular reconstruction of neural face reflectance fields. In: Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition. IEEE; 2021:4791-4800. doi:10.1109/CVPR46437.2021.00476","ieee":"M. B R et al., “Monocular reconstruction of neural face reflectance fields,” in Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition, Nashville, TN, United States; Virtual, 2021, pp. 4791–4800.","short":"M. B R, A. Tewari, T.-H. Oh, T. Weyrich, B. Bickel, H.-P. Seidel, H. Pfister, W. Matusik, M. Elgharib, C. Theobalt, in:, Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition, IEEE, 2021, pp. 4791–4800.","chicago":"B R, Mallikarjun, Ayush Tewari, Tae-Hyun Oh, Tim Weyrich, Bernd Bickel, Hans-Peter Seidel, Hanspeter Pfister, Wojciech Matusik, Mohamed Elgharib, and Christian Theobalt. “Monocular Reconstruction of Neural Face Reflectance Fields.” In Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 4791–4800. IEEE, 2021. https://doi.org/10.1109/CVPR46437.2021.00476.","ista":"B R M, Tewari A, Oh T-H, Weyrich T, Bickel B, Seidel H-P, Pfister H, Matusik W, Elgharib M, Theobalt C. 2021. Monocular reconstruction of neural face reflectance fields. Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition. CVPR: Conference on Computer Vision and Pattern Recognition, 4791–4800."},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","author":[{"full_name":"B R, Mallikarjun","last_name":"B R","first_name":"Mallikarjun"},{"first_name":"Ayush","last_name":"Tewari","full_name":"Tewari, Ayush"},{"last_name":"Oh","full_name":"Oh, Tae-Hyun","first_name":"Tae-Hyun"},{"last_name":"Weyrich","full_name":"Weyrich, Tim","first_name":"Tim"},{"full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"first_name":"Hans-Peter","full_name":"Seidel, Hans-Peter","last_name":"Seidel"},{"full_name":"Pfister, Hanspeter","last_name":"Pfister","first_name":"Hanspeter"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"},{"first_name":"Mohamed","last_name":"Elgharib","full_name":"Elgharib, Mohamed"},{"first_name":"Christian","full_name":"Theobalt, Christian","last_name":"Theobalt"}],"external_id":{"isi":["000739917304096"],"arxiv":["2008.10247"]},"article_processing_charge":"No","title":"Monocular reconstruction of neural face reflectance fields","publication_identifier":{"issn":["1063-6919"],"isbn":["978-166544509-2"]},"publication_status":"published","file":[{"file_id":"9958","checksum":"961db0bde76dd87cf833930080bb9f38","access_level":"open_access","relation":"main_file","content_type":"application/pdf","date_created":"2021-08-24T06:02:15Z","file_name":"R_Monocular_Reconstruction_of_Neural_Face_Reflectance_Fields_CVPR_2021_paper[1].pdf","creator":"bbickel","date_updated":"2021-08-24T06:02:15Z","file_size":4746649}],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"The reflectance field of a face describes the reflectance properties responsible for complex lighting effects including diffuse, specular, inter-reflection and self shadowing. Most existing methods for estimating the face reflectance from a monocular image assume faces to be diffuse with very few approaches adding a specular component. This still leaves out important perceptual aspects of reflectance as higher-order global illumination effects and self-shadowing are not modeled. We present a new neural representation for face reflectance where we can estimate all components of the reflectance responsible for the final appearance from a single monocular image. Instead of modeling each component of the reflectance separately using parametric models, our neural representation allows us to generate a basis set of faces in a geometric deformation-invariant space, parameterized by the input light direction, viewpoint and face geometry. We learn to reconstruct this reflectance field of a face just from a monocular image, which can be used to render the face from any viewpoint in any light condition. Our method is trained on a light-stage training dataset, which captures 300 people illuminated with 150 light conditions from 8 viewpoints. We show that our method outperforms existing monocular reflectance reconstruction methods, in terms of photorealism due to better capturing of physical premitives, such as sub-surface scattering, specularities, self-shadows and other higher-order effects."}],"oa_version":"Preprint","scopus_import":"1","month":"09","date_updated":"2023-08-11T11:08:35Z","ddc":["000"],"department":[{"_id":"BeBi"}],"file_date_updated":"2021-08-24T06:02:15Z","_id":"9957","type":"conference","conference":{"name":"CVPR: Conference on Computer Vision and Pattern Recognition","start_date":"2021-06-20","location":"Nashville, TN, United States; Virtual","end_date":"2021-06-25"},"status":"public"},{"file_date_updated":"2021-10-11T12:06:50Z","department":[{"_id":"BeBi"}],"date_updated":"2023-08-14T08:01:50Z","ddc":["004"],"type":"journal_article","article_type":"original","status":"public","_id":"9547","ec_funded":1,"volume":40,"issue":"2","publication_status":"published","publication_identifier":{"issn":["0167-7055"],"eissn":["1467-8659"]},"language":[{"iso":"eng"}],"file":[{"creator":"bbickel","file_size":26026501,"date_updated":"2021-10-11T12:06:50Z","file_name":"ScatteringAwareColor3DPrinting_authorVersion.pdf","date_created":"2021-10-11T12:06:50Z","relation":"main_file","access_level":"open_access","content_type":"application/pdf","success":1,"file_id":"10120","checksum":"33271724215f54a75c39d2ed40f2c502"}],"scopus_import":"1","intvolume":" 40","month":"05","abstract":[{"lang":"eng","text":"With the wider availability of full-color 3D printers, color-accurate 3D-print preparation has received increased attention. A key challenge lies in the inherent translucency of commonly used print materials that blurs out details of the color texture. Previous work tries to compensate for these scattering effects through strategic assignment of colored primary materials to printer voxels. To date, the highest-quality approach uses iterative optimization that relies on computationally expensive Monte Carlo light transport simulation to predict the surface appearance from subsurface scattering within a given print material distribution; that optimization, however, takes in the order of days on a single machine. In our work, we dramatically speed up the process by replacing the light transport simulation with a data-driven approach. Leveraging a deep neural network to predict the scattering within a highly heterogeneous medium, our method performs around two orders of magnitude faster than Monte Carlo rendering while yielding optimization results of similar quality level. The network is based on an established method from atmospheric cloud rendering, adapted to our domain and extended by a physically motivated weight sharing scheme that substantially reduces the network size. We analyze its performance in an end-to-end print preparation pipeline and compare quality and runtime to alternative approaches, and demonstrate its generalization to unseen geometry and material values. This for the first time enables full heterogenous material optimization for 3D-print preparation within time frames in the order of the actual printing time."}],"oa_version":"Submitted Version","article_processing_charge":"No","external_id":{"isi":["000657959600017"]},"author":[{"first_name":"Tobias","last_name":"Rittig","full_name":"Rittig, Tobias"},{"first_name":"Denis","full_name":"Sumin, Denis","last_name":"Sumin"},{"full_name":"Babaei, Vahid","last_name":"Babaei","first_name":"Vahid"},{"full_name":"Didyk, Piotr","last_name":"Didyk","first_name":"Piotr"},{"last_name":"Voloboy","full_name":"Voloboy, Alexey","first_name":"Alexey"},{"first_name":"Alexander","full_name":"Wilkie, Alexander","last_name":"Wilkie"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385"},{"full_name":"Myszkowski, Karol","last_name":"Myszkowski","first_name":"Karol"},{"first_name":"Tim","last_name":"Weyrich","full_name":"Weyrich, Tim"},{"first_name":"Jaroslav","full_name":"Křivánek, Jaroslav","last_name":"Křivánek"}],"title":"Neural acceleration of scattering-aware color 3D printing","citation":{"chicago":"Rittig, Tobias, Denis Sumin, Vahid Babaei, Piotr Didyk, Alexey Voloboy, Alexander Wilkie, Bernd Bickel, Karol Myszkowski, Tim Weyrich, and Jaroslav Křivánek. “Neural Acceleration of Scattering-Aware Color 3D Printing.” Computer Graphics Forum. Wiley, 2021. https://doi.org/10.1111/cgf.142626.","ista":"Rittig T, Sumin D, Babaei V, Didyk P, Voloboy A, Wilkie A, Bickel B, Myszkowski K, Weyrich T, Křivánek J. 2021. Neural acceleration of scattering-aware color 3D printing. Computer Graphics Forum. 40(2), 205–219.","mla":"Rittig, Tobias, et al. “Neural Acceleration of Scattering-Aware Color 3D Printing.” Computer Graphics Forum, vol. 40, no. 2, Wiley, 2021, pp. 205–19, doi:10.1111/cgf.142626.","ieee":"T. Rittig et al., “Neural acceleration of scattering-aware color 3D printing,” Computer Graphics Forum, vol. 40, no. 2. Wiley, pp. 205–219, 2021.","short":"T. Rittig, D. Sumin, V. Babaei, P. Didyk, A. Voloboy, A. Wilkie, B. Bickel, K. Myszkowski, T. Weyrich, J. Křivánek, Computer Graphics Forum 40 (2021) 205–219.","apa":"Rittig, T., Sumin, D., Babaei, V., Didyk, P., Voloboy, A., Wilkie, A., … Křivánek, J. (2021). Neural acceleration of scattering-aware color 3D printing. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.142626","ama":"Rittig T, Sumin D, Babaei V, et al. Neural acceleration of scattering-aware color 3D printing. Computer Graphics Forum. 2021;40(2):205-219. doi:10.1111/cgf.142626"},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","project":[{"call_identifier":"H2020","_id":"2508E324-B435-11E9-9278-68D0E5697425","grant_number":"642841","name":"Distributed 3D Object Design"},{"_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling"}],"page":"205-219","date_created":"2021-06-13T22:01:32Z","date_published":"2021-05-01T00:00:00Z","doi":"10.1111/cgf.142626","year":"2021","isi":1,"has_accepted_license":"1","publication":"Computer Graphics Forum","day":"01","oa":1,"publisher":"Wiley","quality_controlled":"1","acknowledgement":"We thank Sebastian Cucerca for processing and capturing the phys-cal printouts. This work was supported by the Charles University grant SVV-260588 and Czech Science Foundation grant 19-07626S. This project has received funding from the European Union’s Horizon 2020 research and innovation programme, under the Marie Skłodowska Curie grant agreements No 642841 (DISTRO) and No765911 (RealVision), and under the European Research Council grant agreement No 715767 (MATERIALIZABLE)."},{"_id":"10184","type":"journal_article","article_type":"original","status":"public","date_updated":"2024-02-28T12:52:48Z","ddc":["000"],"file_date_updated":"2021-10-27T07:08:07Z","department":[{"_id":"BeBi"}],"abstract":[{"lang":"eng","text":"We introduce a novel technique to automatically decompose an input object’s volume into a set of parts that can be represented by two opposite height fields. Such decomposition enables the manufacturing of individual parts using two-piece reusable rigid molds. Our decomposition strategy relies on a new energy formulation that utilizes a pre-computed signal on the mesh volume representing the accessibility for a predefined set of extraction directions. Thanks to this novel formulation, our method allows for efficient optimization of a fabrication-aware partitioning of volumes in a completely\r\nautomatic way. We demonstrate the efficacy of our approach by generating valid volume partitionings for a wide range of complex objects and physically reproducing several of them."}],"oa_version":"Submitted Version","main_file_link":[{"open_access":"1","url":"http://vcg.isti.cnr.it/Publications/2021/AMBCP21"}],"intvolume":" 40","month":"12","publication_status":"published","publication_identifier":{"issn":["0730-0301"],"eissn":["1557-7368 "]},"language":[{"iso":"eng"}],"file":[{"creator":"bbickel","file_size":107708317,"date_updated":"2021-10-27T07:08:07Z","file_name":"rigidmolds-authorversion.pdf","date_created":"2021-10-27T07:08:07Z","relation":"main_file","access_level":"open_access","content_type":"application/pdf","checksum":"384ece7a9ad1026787ba9560b04336d5","file_id":"10185"}],"ec_funded":1,"issue":"6","volume":40,"article_number":"272","project":[{"_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767"}],"citation":{"ista":"Alderighi T, Malomo L, Bickel B, Cignoni P, Pietroni N. 2021. Volume decomposition for two-piece rigid casting. ACM Transactions on Graphics. 40(6), 272.","chicago":"Alderighi, Thomas, Luigi Malomo, Bernd Bickel, Paolo Cignoni, and Nico Pietroni. “Volume Decomposition for Two-Piece Rigid Casting.” ACM Transactions on Graphics. Association for Computing Machinery, 2021. https://doi.org/10.1145/3478513.3480555.","short":"T. Alderighi, L. Malomo, B. Bickel, P. Cignoni, N. Pietroni, ACM Transactions on Graphics 40 (2021).","ieee":"T. Alderighi, L. Malomo, B. Bickel, P. Cignoni, and N. Pietroni, “Volume decomposition for two-piece rigid casting,” ACM Transactions on Graphics, vol. 40, no. 6. Association for Computing Machinery, 2021.","apa":"Alderighi, T., Malomo, L., Bickel, B., Cignoni, P., & Pietroni, N. (2021). Volume decomposition for two-piece rigid casting. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3478513.3480555","ama":"Alderighi T, Malomo L, Bickel B, Cignoni P, Pietroni N. Volume decomposition for two-piece rigid casting. ACM Transactions on Graphics. 2021;40(6). doi:10.1145/3478513.3480555","mla":"Alderighi, Thomas, et al. “Volume Decomposition for Two-Piece Rigid Casting.” ACM Transactions on Graphics, vol. 40, no. 6, 272, Association for Computing Machinery, 2021, doi:10.1145/3478513.3480555."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","external_id":{"isi":["000729846700077"]},"article_processing_charge":"No","author":[{"first_name":"Thomas","full_name":"Alderighi, Thomas","last_name":"Alderighi"},{"first_name":"Luigi","full_name":"Malomo, Luigi","last_name":"Malomo"},{"full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Paolo","full_name":"Cignoni, Paolo","last_name":"Cignoni"},{"first_name":"Nico","last_name":"Pietroni","full_name":"Pietroni, Nico"}],"title":"Volume decomposition for two-piece rigid casting","acknowledgement":"The authors thank Marco Callieri for all his precious help with the resin casts. The models used in the paper are courtesy of the Stanford 3D Scanning Repository, the AIM@SHAPE Shape Repository, and Thingi10K Repository. The research was partially funded by the European Research Council (ERC) MATERIALIZABLE: Intelligent fabrication-oriented computational design and modeling (grant no. 715767).","oa":1,"quality_controlled":"1","publisher":"Association for Computing Machinery","year":"2021","isi":1,"has_accepted_license":"1","publication":"ACM Transactions on Graphics","day":"01","date_created":"2021-10-27T07:08:19Z","date_published":"2021-12-01T00:00:00Z","doi":"10.1145/3478513.3480555"},{"keyword":["Computing methodologies","shape modeling","modeling and simulation","theory of computation","computational geometry","mathematics of computing","mathematical optimization"],"status":"public","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"conference":{"end_date":"2021-08-13","location":"Virtual","start_date":"2021-08-09","name":"SIGGRAF: Special Interest Group on Computer Graphics and Interactive Techniques"},"article_type":"original","type":"journal_article","_id":"9817","file_date_updated":"2021-10-18T10:42:22Z","department":[{"_id":"BeBi"}],"ddc":["516"],"date_updated":"2024-03-27T23:30:45Z","intvolume":" 40","month":"07","scopus_import":"1","oa_version":"Published Version","abstract":[{"text":"Elastic bending of initially flat slender elements allows the realization and economic fabrication of intriguing curved shapes. In this work, we derive an intuitive but rigorous geometric characterization of the design space of plane elastic rods with variable stiffness. It enables designers to determine which shapes are physically viable with active bending by visual inspection alone. Building on these insights, we propose a method for efficiently designing the geometry of a flat elastic rod that realizes a target equilibrium curve, which only requires solving a linear program. We implement this method in an interactive computational design tool that gives feedback about the feasibility of a design, and computes the geometry of the structural elements necessary to realize it within an instant. The tool also offers an iterative optimization routine that improves the fabricability of a model while modifying it as little as possible. In addition, we use our geometric characterization to derive an algorithm for analyzing and recovering the stability of elastic curves that would otherwise snap out of their unstable equilibrium shapes by buckling. We show the efficacy of our approach by designing and manufacturing several physical models that are assembled from flat elements.","lang":"eng"}],"ec_funded":1,"related_material":{"link":[{"relation":"press_release","url":"https://ist.ac.at/en/news/designing-with-elastic-structures/","description":"News on IST Website"}],"record":[{"relation":"dissertation_contains","status":"public","id":"12897"}]},"volume":40,"issue":"4","language":[{"iso":"eng"}],"file":[{"file_size":17064290,"date_updated":"2021-10-18T10:42:15Z","creator":"chafner","file_name":"elastic-curves-paper.pdf","date_created":"2021-10-18T10:42:15Z","content_type":"application/pdf","relation":"main_file","access_level":"open_access","success":1,"checksum":"7e5d08ce46b0451b3102eacd3d00f85f","file_id":"10150"},{"date_created":"2021-10-18T10:42:22Z","file_name":"elastic-curves-supp.pdf","creator":"chafner","date_updated":"2021-10-18T10:42:22Z","file_size":547156,"file_id":"10151","checksum":"0088643478be7c01a703b5b10767348f","access_level":"open_access","relation":"supplementary_material","content_type":"application/pdf"}],"publication_status":"published","publication_identifier":{"issn":["0730-0301"],"eissn":["1557-7368"]},"project":[{"name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767","_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"article_number":"126","title":"The design space of plane elastic curves","article_processing_charge":"No","external_id":{"isi":["000674930900091"]},"author":[{"full_name":"Hafner, Christian","last_name":"Hafner","id":"400429CC-F248-11E8-B48F-1D18A9856A87","first_name":"Christian"},{"last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"ama":"Hafner C, Bickel B. The design space of plane elastic curves. ACM Transactions on Graphics. 2021;40(4). doi:10.1145/3450626.3459800","apa":"Hafner, C., & Bickel, B. (2021). The design space of plane elastic curves. ACM Transactions on Graphics. Virtual: Association for Computing Machinery. https://doi.org/10.1145/3450626.3459800","short":"C. Hafner, B. Bickel, ACM Transactions on Graphics 40 (2021).","ieee":"C. Hafner and B. Bickel, “The design space of plane elastic curves,” ACM Transactions on Graphics, vol. 40, no. 4. Association for Computing Machinery, 2021.","mla":"Hafner, Christian, and Bernd Bickel. “The Design Space of Plane Elastic Curves.” ACM Transactions on Graphics, vol. 40, no. 4, 126, Association for Computing Machinery, 2021, doi:10.1145/3450626.3459800.","ista":"Hafner C, Bickel B. 2021. The design space of plane elastic curves. ACM Transactions on Graphics. 40(4), 126.","chicago":"Hafner, Christian, and Bernd Bickel. “The Design Space of Plane Elastic Curves.” ACM Transactions on Graphics. Association for Computing Machinery, 2021. https://doi.org/10.1145/3450626.3459800."},"oa":1,"publisher":"Association for Computing Machinery","quality_controlled":"1","acknowledgement":"We thank the anonymous reviewers for their generous feedback, and Michal Piovarči for his help in producing the supplemental video. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 715767).\r\n","date_created":"2021-08-08T22:01:26Z","doi":"10.1145/3450626.3459800","date_published":"2021-07-19T00:00:00Z","publication":"ACM Transactions on Graphics","day":"19","year":"2021","isi":1,"has_accepted_license":"1"},{"date_created":"2021-02-28T23:01:25Z","date_published":"2020-09-01T00:00:00Z","doi":"10.1007/s42452-020-03305-w","year":"2020","publication":"SN Applied Sciences","day":"01","publisher":"Springer Nature","quality_controlled":"1","acknowledgement":"The FlexMaps Pavilion has been awarded First Prize at the “Competition and Exhibition of innovative lightweight structures” organized by the IASS Working Group 21 within the FORM and FORCE, joint international conference of IASS Symposium 2019 and Structural Membranes 2019 (Barcelona, 7-11 October 2019) with the following motivation: “for its structural innovation of bending-twisting system, connection constructability and exquisite craftmanship”[20]. The authors would like to acknowledge the Visual Computing Lab Staff of ISTI - CNR, in particular Thomas Alderighi, Marco Callieri, Paolo Pingi; Antonio Rizzo of IPCF - CNR; and the Administrative Staff of ISTI - CNR. This research was partially funded by the EU H2020 Programme EVOCATION: Advanced Visual and Geometric Computing for 3D Capture, Display, and Fabrication (grant no. 813170).","article_processing_charge":"No","author":[{"first_name":"Francesco","last_name":"Laccone","full_name":"Laccone, Francesco"},{"first_name":"Luigi","full_name":"Malomo, Luigi","last_name":"Malomo"},{"id":"2DC83906-F248-11E8-B48F-1D18A9856A87","first_name":"Jesus","last_name":"Perez Rodriguez","full_name":"Perez Rodriguez, Jesus"},{"full_name":"Pietroni, Nico","last_name":"Pietroni","first_name":"Nico"},{"last_name":"Ponchio","full_name":"Ponchio, Federico","first_name":"Federico"},{"full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"last_name":"Cignoni","full_name":"Cignoni, Paolo","first_name":"Paolo"}],"title":"A bending-active twisted-arch plywood structure: Computational design and fabrication of the FlexMaps Pavilion","citation":{"chicago":"Laccone, Francesco, Luigi Malomo, Jesus Perez Rodriguez, Nico Pietroni, Federico Ponchio, Bernd Bickel, and Paolo Cignoni. “A Bending-Active Twisted-Arch Plywood Structure: Computational Design and Fabrication of the FlexMaps Pavilion.” SN Applied Sciences. Springer Nature, 2020. https://doi.org/10.1007/s42452-020-03305-w.","ista":"Laccone F, Malomo L, Perez Rodriguez J, Pietroni N, Ponchio F, Bickel B, Cignoni P. 2020. A bending-active twisted-arch plywood structure: Computational design and fabrication of the FlexMaps Pavilion. SN Applied Sciences. 2(9), 1505.","mla":"Laccone, Francesco, et al. “A Bending-Active Twisted-Arch Plywood Structure: Computational Design and Fabrication of the FlexMaps Pavilion.” SN Applied Sciences, vol. 2, no. 9, 1505, Springer Nature, 2020, doi:10.1007/s42452-020-03305-w.","apa":"Laccone, F., Malomo, L., Perez Rodriguez, J., Pietroni, N., Ponchio, F., Bickel, B., & Cignoni, P. (2020). A bending-active twisted-arch plywood structure: Computational design and fabrication of the FlexMaps Pavilion. SN Applied Sciences. Springer Nature. https://doi.org/10.1007/s42452-020-03305-w","ama":"Laccone F, Malomo L, Perez Rodriguez J, et al. A bending-active twisted-arch plywood structure: Computational design and fabrication of the FlexMaps Pavilion. SN Applied Sciences. 2020;2(9). doi:10.1007/s42452-020-03305-w","ieee":"F. Laccone et al., “A bending-active twisted-arch plywood structure: Computational design and fabrication of the FlexMaps Pavilion,” SN Applied Sciences, vol. 2, no. 9. Springer Nature, 2020.","short":"F. Laccone, L. Malomo, J. Perez Rodriguez, N. Pietroni, F. Ponchio, B. Bickel, P. Cignoni, SN Applied Sciences 2 (2020)."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_number":"1505","issue":"9","volume":2,"publication_status":"published","publication_identifier":{"eissn":["25233971"]},"language":[{"iso":"eng"}],"scopus_import":"1","intvolume":" 2","month":"09","abstract":[{"lang":"eng","text":"Bending-active structures are able to efficiently produce complex curved shapes from flat panels. The desired deformation of the panels derives from the proper selection of their elastic properties. Optimized panels, called FlexMaps, are designed such that, once they are bent and assembled, the resulting static equilibrium configuration matches a desired input 3D shape. The FlexMaps elastic properties are controlled by locally varying spiraling geometric mesostructures, which are optimized in size and shape to match specific bending requests, namely the global curvature of the target shape. The design pipeline starts from a quad mesh representing the input 3D shape, which defines the edge size and the total amount of spirals: every quad will embed one spiral. Then, an optimization algorithm tunes the geometry of the spirals by using a simplified pre-computed rod model. This rod model is derived from a non-linear regression algorithm which approximates the non-linear behavior of solid FEM spiral models subject to hundreds of load combinations. This innovative pipeline has been applied to the project of a lightweight plywood pavilion named FlexMaps Pavilion, which is a single-layer piecewise twisted arch that fits a bounding box of 3.90x3.96x3.25 meters. This case study serves to test the applicability of this methodology at the architectural scale. The structure is validated via FE analyses and the fabrication of the full scale prototype."}],"oa_version":"None","department":[{"_id":"BeBi"}],"date_updated":"2021-03-03T09:43:14Z","article_type":"original","type":"journal_article","status":"public","_id":"9208"},{"status":"public","type":"journal_article","article_type":"original","_id":"8562","file_date_updated":"2023-05-23T20:54:43Z","department":[{"_id":"BeBi"}],"ddc":["000"],"date_updated":"2024-02-21T12:43:21Z","intvolume":" 39","month":"11","scopus_import":"1","oa_version":"Submitted Version","acknowledged_ssus":[{"_id":"ScienComp"}],"abstract":[{"text":"Cold bent glass is a promising and cost-efficient method for realizing doubly curved glass facades. They are produced by attaching planar glass sheets to curved frames and require keeping the occurring stress within safe limits.\r\nHowever, it is very challenging to navigate the design space of cold bent glass panels due to the fragility of the material, which impedes the form-finding for practically feasible and aesthetically pleasing cold bent glass facades. We propose an interactive, data-driven approach for designing cold bent glass facades that can be seamlessly integrated into a typical architectural design pipeline. Our method allows non-expert users to interactively edit a parametric surface while providing real-time feedback on the deformed shape and maximum stress of cold bent glass panels. Designs are automatically refined to minimize several fairness criteria while maximal stresses are kept within glass limits. We achieve interactive frame rates by using a differentiable Mixture Density Network trained from more than a million simulations. Given a curved boundary, our regression model is capable of handling multistable\r\nconfigurations and accurately predicting the equilibrium shape of the panel and its corresponding maximal stress. We show predictions are highly accurate and validate our results with a physical realization of a cold bent glass surface.","lang":"eng"}],"ec_funded":1,"volume":39,"issue":"6","related_material":{"link":[{"description":"News on IST Homepage","url":"https://ist.ac.at/en/news/bend-dont-break/","relation":"press_release"}],"record":[{"relation":"dissertation_contains","id":"8366","status":"public"},{"status":"public","id":"8761","relation":"research_data"}]},"language":[{"iso":"eng"}],"file":[{"checksum":"c7f67717ad74e670b7daeae732abe151","file_id":"13084","success":1,"access_level":"open_access","relation":"main_file","content_type":"application/pdf","date_created":"2023-05-23T20:54:43Z","file_name":"coldglass.pdf","creator":"bbickel","date_updated":"2023-05-23T20:54:43Z","file_size":28964641}],"publication_status":"published","publication_identifier":{"eissn":["1557-7368"],"issn":["0730-0301"]},"project":[{"call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767"}],"article_number":"208","title":"Computational design of cold bent glass façades","external_id":{"isi":["000595589100048"],"arxiv":["2009.03667"]},"article_processing_charge":"No","author":[{"last_name":"Gavriil","full_name":"Gavriil, Konstantinos","first_name":"Konstantinos"},{"orcid":"0000-0001-9819-5077","full_name":"Guseinov, Ruslan","last_name":"Guseinov","first_name":"Ruslan","id":"3AB45EE2-F248-11E8-B48F-1D18A9856A87"},{"id":"2DC83906-F248-11E8-B48F-1D18A9856A87","first_name":"Jesus","last_name":"Perez Rodriguez","full_name":"Perez Rodriguez, Jesus"},{"first_name":"Davide","last_name":"Pellis","full_name":"Pellis, Davide"},{"first_name":"Paul M","id":"13C09E74-18D9-11E9-8878-32CFE5697425","last_name":"Henderson","orcid":"0000-0002-5198-7445","full_name":"Henderson, Paul M"},{"first_name":"Florian","last_name":"Rist","full_name":"Rist, Florian"},{"first_name":"Helmut","full_name":"Pottmann, Helmut","last_name":"Pottmann"},{"orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"chicago":"Gavriil, Konstantinos, Ruslan Guseinov, Jesus Perez Rodriguez, Davide Pellis, Paul M Henderson, Florian Rist, Helmut Pottmann, and Bernd Bickel. “Computational Design of Cold Bent Glass Façades.” ACM Transactions on Graphics. Association for Computing Machinery, 2020. https://doi.org/10.1145/3414685.3417843.","ista":"Gavriil K, Guseinov R, Perez Rodriguez J, Pellis D, Henderson PM, Rist F, Pottmann H, Bickel B. 2020. Computational design of cold bent glass façades. ACM Transactions on Graphics. 39(6), 208.","mla":"Gavriil, Konstantinos, et al. “Computational Design of Cold Bent Glass Façades.” ACM Transactions on Graphics, vol. 39, no. 6, 208, Association for Computing Machinery, 2020, doi:10.1145/3414685.3417843.","short":"K. Gavriil, R. Guseinov, J. Perez Rodriguez, D. Pellis, P.M. Henderson, F. Rist, H. Pottmann, B. Bickel, ACM Transactions on Graphics 39 (2020).","ieee":"K. Gavriil et al., “Computational design of cold bent glass façades,” ACM Transactions on Graphics, vol. 39, no. 6. Association for Computing Machinery, 2020.","ama":"Gavriil K, Guseinov R, Perez Rodriguez J, et al. Computational design of cold bent glass façades. ACM Transactions on Graphics. 2020;39(6). doi:10.1145/3414685.3417843","apa":"Gavriil, K., Guseinov, R., Perez Rodriguez, J., Pellis, D., Henderson, P. M., Rist, F., … Bickel, B. (2020). Computational design of cold bent glass façades. ACM Transactions on Graphics. Association for Computing Machinery. https://doi.org/10.1145/3414685.3417843"},"oa":1,"publisher":"Association for Computing Machinery","quality_controlled":"1","acknowledgement":"We thank IST Austria’s Scientific Computing team for their support, Corinna Datsiou and Sophie Pennetier for their expert input on the practical applications of cold bent glass, and Zaha Hadid Architects and Waagner Biro for providing the architectural datasets. Photo of Fondation Louis Vuitton by Francisco Anzola / CC BY 2.0 / cropped.\r\nPhoto of Opus by Danica O. Kus. This project has received funding from the European Union’s\r\nHorizon 2020 research and innovation program under grant agreement No 675789 - Algebraic Representations in Computer-Aided Design for complEx Shapes (ARCADES), from the European Research Council (ERC) under grant agreement No 715767 - MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling, and SFB-Transregio “Discretization in Geometry and Dynamics” through grant I 2978 of the Austrian Science Fund (FWF). F. Rist and K. Gavriil have been partially supported by KAUST baseline funding.","date_created":"2020-09-23T11:30:02Z","doi":"10.1145/3414685.3417843","date_published":"2020-11-26T00:00:00Z","publication":"ACM Transactions on Graphics","day":"26","year":"2020","isi":1,"has_accepted_license":"1"},{"ec_funded":1,"volume":11,"related_material":{"link":[{"url":"https://ist.ac.at/en/news/geometry-meets-time/","relation":"press_release","description":"News on IST Homepage"}],"record":[{"status":"public","id":"8366","relation":"dissertation_contains"},{"id":"7154","status":"public","relation":"research_data"}]},"language":[{"iso":"eng"}],"file":[{"date_created":"2020-01-15T14:35:34Z","file_name":"2020_NatureComm_Guseinov.pdf","creator":"rguseino","date_updated":"2020-07-14T12:47:55Z","file_size":1315270,"file_id":"7336","checksum":"7db23fef2f4cda712f17f1004116ddff","access_level":"open_access","relation":"main_file","content_type":"application/pdf"}],"publication_status":"published","publication_identifier":{"issn":["2041-1723"]},"intvolume":" 11","month":"01","scopus_import":"1","oa_version":"Published Version","abstract":[{"lang":"eng","text":"Advances in shape-morphing materials, such as hydrogels, shape-memory polymers and light-responsive polymers have enabled prescribing self-directed deformations of initially flat geometries. However, most proposed solutions evolve towards a target geometry without considering time-dependent actuation paths. To achieve more complex geometries and avoid self-collisions, it is critical to encode a spatial and temporal shape evolution within the initially flat shell. Recent realizations of time-dependent morphing are limited to the actuation of few, discrete hinges and cannot form doubly curved surfaces. Here, we demonstrate a method for encoding temporal shape evolution in architected shells that assume complex shapes and doubly curved geometries. The shells are non-periodic tessellations of pre-stressed contractile unit cells that soften in water at rates prescribed locally by mesostructure geometry. The ensuing midplane contraction is coupled to the formation of encoded curvatures. We propose an inverse design tool based on a data-driven model for unit cells’ temporal responses."}],"file_date_updated":"2020-07-14T12:47:55Z","department":[{"_id":"BeBi"}],"ddc":["000"],"date_updated":"2024-02-21T12:45:02Z","keyword":["Design","Synthesis and processing","Mechanical engineering","Polymers"],"status":"public","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"type":"journal_article","article_type":"original","_id":"7262","date_created":"2020-01-13T16:54:26Z","date_published":"2020-01-13T00:00:00Z","doi":"10.1038/s41467-019-14015-2","publication":"Nature Communications","day":"13","year":"2020","has_accepted_license":"1","isi":1,"oa":1,"quality_controlled":"1","publisher":"Springer Nature","title":"Programming temporal morphing of self-actuated shells","article_processing_charge":"No","external_id":{"isi":["000511916800015"]},"author":[{"full_name":"Guseinov, Ruslan","orcid":"0000-0001-9819-5077","last_name":"Guseinov","id":"3AB45EE2-F248-11E8-B48F-1D18A9856A87","first_name":"Ruslan"},{"full_name":"McMahan, Connor","last_name":"McMahan","first_name":"Connor"},{"last_name":"Perez Rodriguez","full_name":"Perez Rodriguez, Jesus","id":"2DC83906-F248-11E8-B48F-1D18A9856A87","first_name":"Jesus"},{"first_name":"Chiara","full_name":"Daraio, Chiara","last_name":"Daraio"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"mla":"Guseinov, Ruslan, et al. “Programming Temporal Morphing of Self-Actuated Shells.” Nature Communications, vol. 11, 237, Springer Nature, 2020, doi:10.1038/s41467-019-14015-2.","apa":"Guseinov, R., McMahan, C., Perez Rodriguez, J., Daraio, C., & Bickel, B. (2020). Programming temporal morphing of self-actuated shells. Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-019-14015-2","ama":"Guseinov R, McMahan C, Perez Rodriguez J, Daraio C, Bickel B. Programming temporal morphing of self-actuated shells. Nature Communications. 2020;11. doi:10.1038/s41467-019-14015-2","short":"R. Guseinov, C. McMahan, J. Perez Rodriguez, C. Daraio, B. Bickel, Nature Communications 11 (2020).","ieee":"R. Guseinov, C. McMahan, J. Perez Rodriguez, C. Daraio, and B. Bickel, “Programming temporal morphing of self-actuated shells,” Nature Communications, vol. 11. Springer Nature, 2020.","chicago":"Guseinov, Ruslan, Connor McMahan, Jesus Perez Rodriguez, Chiara Daraio, and Bernd Bickel. “Programming Temporal Morphing of Self-Actuated Shells.” Nature Communications. Springer Nature, 2020. https://doi.org/10.1038/s41467-019-14015-2.","ista":"Guseinov R, McMahan C, Perez Rodriguez J, Daraio C, Bickel B. 2020. Programming temporal morphing of self-actuated shells. Nature Communications. 11, 237."},"project":[{"name":"ISTplus - Postdoctoral Fellowships","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"},{"name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767","call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425"}],"article_number":"237"},{"title":"Geometry-aware scattering compensation for 3D printing","external_id":{"isi":["000475740600085"]},"article_processing_charge":"No","author":[{"full_name":"Sumin, Denis","last_name":"Sumin","first_name":"Denis"},{"last_name":"Weyrich","full_name":"Weyrich, Tim","first_name":"Tim"},{"last_name":"Rittig","full_name":"Rittig, Tobias","first_name":"Tobias"},{"last_name":"Babaei","full_name":"Babaei, Vahid","first_name":"Vahid"},{"full_name":"Nindel, Thomas","last_name":"Nindel","first_name":"Thomas"},{"first_name":"Alexander","full_name":"Wilkie, Alexander","last_name":"Wilkie"},{"first_name":"Piotr","full_name":"Didyk, Piotr","last_name":"Didyk"},{"last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"first_name":"Jaroslav","full_name":"Křivánek, Jaroslav","last_name":"Křivánek"},{"first_name":"Karol","last_name":"Myszkowski","full_name":"Myszkowski, Karol"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"ista":"Sumin D, Weyrich T, Rittig T, Babaei V, Nindel T, Wilkie A, Didyk P, Bickel B, Křivánek J, Myszkowski K. 2019. Geometry-aware scattering compensation for 3D printing. ACM Transactions on Graphics. 38(4), 111.","chicago":"Sumin, Denis, Tim Weyrich, Tobias Rittig, Vahid Babaei, Thomas Nindel, Alexander Wilkie, Piotr Didyk, Bernd Bickel, Jaroslav Křivánek, and Karol Myszkowski. “Geometry-Aware Scattering Compensation for 3D Printing.” ACM Transactions on Graphics. ACM, 2019. https://doi.org/10.1145/3306346.3322992.","ieee":"D. Sumin et al., “Geometry-aware scattering compensation for 3D printing,” ACM Transactions on Graphics, vol. 38, no. 4. ACM, 2019.","short":"D. Sumin, T. Weyrich, T. Rittig, V. Babaei, T. Nindel, A. Wilkie, P. Didyk, B. Bickel, J. Křivánek, K. Myszkowski, ACM Transactions on Graphics 38 (2019).","ama":"Sumin D, Weyrich T, Rittig T, et al. Geometry-aware scattering compensation for 3D printing. ACM Transactions on Graphics. 2019;38(4). doi:10.1145/3306346.3322992","apa":"Sumin, D., Weyrich, T., Rittig, T., Babaei, V., Nindel, T., Wilkie, A., … Myszkowski, K. (2019). Geometry-aware scattering compensation for 3D printing. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3306346.3322992","mla":"Sumin, Denis, et al. “Geometry-Aware Scattering Compensation for 3D Printing.” ACM Transactions on Graphics, vol. 38, no. 4, 111, ACM, 2019, doi:10.1145/3306346.3322992."},"project":[{"name":"Distributed 3D Object Design","grant_number":"642841","_id":"2508E324-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"},{"name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767","call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425"}],"article_number":"111","date_created":"2019-07-22T07:22:28Z","doi":"10.1145/3306346.3322992","date_published":"2019-07-04T00:00:00Z","publication":"ACM Transactions on Graphics","day":"04","year":"2019","has_accepted_license":"1","isi":1,"oa":1,"quality_controlled":"1","publisher":"ACM","department":[{"_id":"BeBi"}],"file_date_updated":"2020-07-14T12:47:36Z","ddc":["000"],"date_updated":"2023-08-29T06:40:49Z","status":"public","type":"journal_article","_id":"6660","ec_funded":1,"issue":"4","volume":38,"language":[{"iso":"eng"}],"file":[{"relation":"main_file","access_level":"open_access","content_type":"application/pdf","file_id":"6669","checksum":"43c2019d6b48ed9c56e31686c4c2d1f5","creator":"dernst","file_size":10109800,"date_updated":"2020-07-14T12:47:36Z","file_name":"2019_ACM_Sumin_AuthorVersion.pdf","date_created":"2019-07-24T07:36:08Z"},{"content_type":"application/zip","access_level":"open_access","relation":"supplementary_material","checksum":"f80f365a04e35855fa467ea7ab26b16c","file_id":"6938","date_updated":"2020-07-14T12:47:36Z","file_size":11051245,"creator":"dernst","date_created":"2019-10-11T06:51:07Z","file_name":"sumin19geometry-aware-suppl.zip"}],"publication_status":"published","publication_identifier":{"issn":["0730-0301"]},"intvolume":" 38","month":"07","scopus_import":"1","oa_version":"Submitted Version","abstract":[{"lang":"eng","text":"Commercially available full-color 3D printing allows for detailed control of material deposition in a volume, but an exact reproduction of a target surface appearance is hampered by the strong subsurface scattering that causes nontrivial volumetric cross-talk at the print surface. Previous work showed how an iterative optimization scheme based on accumulating absorptive materials at the surface can be used to find a volumetric distribution of print materials that closely approximates a given target appearance.\r\n\r\nIn this work, we first revisit the assumption that pushing the absorptive materials to the surface results in minimal volumetric cross-talk. We design a full-fledged optimization on a small domain for this task and confirm this previously reported heuristic. Then, we extend the above approach that is critically limited to color reproduction on planar surfaces, to arbitrary 3D shapes. Our method enables high-fidelity color texture reproduction on 3D prints by effectively compensating for internal light scattering within arbitrarily shaped objects. In addition, we propose a content-aware gamut mapping that significantly improves color reproduction for the pathological case of thin geometric features. Using a wide range of sample objects with complex textures and geometries, we demonstrate color reproduction whose fidelity is superior to state-of-the-art drivers for color 3D printers."}]},{"oa":1,"quality_controlled":"1","publisher":"ACM","publication":"ACM Transactions on Graphics","day":"01","year":"2019","isi":1,"has_accepted_license":"1","date_created":"2019-07-19T06:18:15Z","date_published":"2019-07-01T00:00:00Z","doi":"10.1145/3306346.3322981","article_number":"110","project":[{"call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425","grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"chicago":"Alderighi, Thomas, Luigi Malomo, Daniela Giorgi, Bernd Bickel, Paolo Cignoni, and Nico Pietroni. “Volume-Aware Design of Composite Molds.” ACM Transactions on Graphics. ACM, 2019. https://doi.org/10.1145/3306346.3322981.","ista":"Alderighi T, Malomo L, Giorgi D, Bickel B, Cignoni P, Pietroni N. 2019. Volume-aware design of composite molds. ACM Transactions on Graphics. 38(4), 110.","mla":"Alderighi, Thomas, et al. “Volume-Aware Design of Composite Molds.” ACM Transactions on Graphics, vol. 38, no. 4, 110, ACM, 2019, doi:10.1145/3306346.3322981.","ieee":"T. Alderighi, L. Malomo, D. Giorgi, B. Bickel, P. Cignoni, and N. Pietroni, “Volume-aware design of composite molds,” ACM Transactions on Graphics, vol. 38, no. 4. ACM, 2019.","short":"T. Alderighi, L. Malomo, D. Giorgi, B. Bickel, P. Cignoni, N. Pietroni, ACM Transactions on Graphics 38 (2019).","apa":"Alderighi, T., Malomo, L., Giorgi, D., Bickel, B., Cignoni, P., & Pietroni, N. (2019). Volume-aware design of composite molds. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3306346.3322981","ama":"Alderighi T, Malomo L, Giorgi D, Bickel B, Cignoni P, Pietroni N. Volume-aware design of composite molds. ACM Transactions on Graphics. 2019;38(4). doi:10.1145/3306346.3322981"},"title":"Volume-aware design of composite molds","article_processing_charge":"No","external_id":{"isi":["000475740600084"]},"author":[{"full_name":"Alderighi, Thomas","last_name":"Alderighi","first_name":"Thomas"},{"first_name":"Luigi","last_name":"Malomo","full_name":"Malomo, Luigi"},{"full_name":"Giorgi, Daniela","last_name":"Giorgi","first_name":"Daniela"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel"},{"full_name":"Cignoni, Paolo","last_name":"Cignoni","first_name":"Paolo"},{"first_name":"Nico","full_name":"Pietroni, Nico","last_name":"Pietroni"}],"oa_version":"Submitted Version","abstract":[{"lang":"eng","text":"We propose a novel technique for the automatic design of molds to cast highly complex shapes. The technique generates composite, two-piece molds. Each mold piece is made up of a hard plastic shell and a flexible silicone part. Thanks to the thin, soft, and smartly shaped silicone part, which is kept in place by a hard plastic shell, we can cast objects of unprecedented complexity. An innovative algorithm based on a volumetric analysis defines the layout of the internal cuts in the silicone mold part. Our approach can robustly handle thin protruding features and intertwined topologies that have caused previous methods to fail. We compare our results with state of the art techniques, and we demonstrate the casting of shapes with extremely complex geometry."}],"intvolume":" 38","month":"07","scopus_import":"1","language":[{"iso":"eng"}],"file":[{"checksum":"b4562af94672b44d2a501046427412af","file_id":"6651","relation":"main_file","access_level":"open_access","content_type":"application/pdf","file_name":"2019_ACM_Alderighi_AuthorVersion.pdf","date_created":"2019-07-19T06:18:53Z","creator":"dernst","file_size":74316182,"date_updated":"2020-07-14T12:47:35Z"}],"publication_status":"published","publication_identifier":{"issn":["0730-0301"]},"ec_funded":1,"issue":"4","volume":38,"related_material":{"link":[{"description":"YouTube Video","relation":"supplementary_material","url":"https://youtu.be/SO349S8-x_w"}]},"_id":"6650","status":"public","type":"journal_article","ddc":["000"],"date_updated":"2023-08-29T06:35:52Z","file_date_updated":"2020-07-14T12:47:35Z","department":[{"_id":"BeBi"}]},{"date_updated":"2023-09-08T11:21:54Z","citation":{"chicago":"Laccone, Francesco, Luigi Malomo, Jesus Perez Rodriguez, Nico Pietroni, Federico Ponchio, Bernd Bickel, and Paolo Cignoni. “FlexMaps Pavilion: A Twisted Arc Made of Mesostructured Flat Flexible Panels.” In IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE, 509–15. International Center for Numerical Methods in Engineering, 2019.","ista":"Laccone F, Malomo L, Perez Rodriguez J, Pietroni N, Ponchio F, Bickel B, Cignoni P. 2019. FlexMaps Pavilion: A twisted arc made of mesostructured flat flexible panels. IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE. IASS: International Association for Shell and Spatial Structures, 509–515.","mla":"Laccone, Francesco, et al. “FlexMaps Pavilion: A Twisted Arc Made of Mesostructured Flat Flexible Panels.” IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE, International Center for Numerical Methods in Engineering, 2019, pp. 509–15.","apa":"Laccone, F., Malomo, L., Perez Rodriguez, J., Pietroni, N., Ponchio, F., Bickel, B., & Cignoni, P. (2019). FlexMaps Pavilion: A twisted arc made of mesostructured flat flexible panels. In IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE (pp. 509–515). Barcelona, Spain: International Center for Numerical Methods in Engineering.","ama":"Laccone F, Malomo L, Perez Rodriguez J, et al. FlexMaps Pavilion: A twisted arc made of mesostructured flat flexible panels. In: IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE. International Center for Numerical Methods in Engineering; 2019:509-515.","ieee":"F. Laccone et al., “FlexMaps Pavilion: A twisted arc made of mesostructured flat flexible panels,” in IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE, Barcelona, Spain, 2019, pp. 509–515.","short":"F. Laccone, L. Malomo, J. Perez Rodriguez, N. Pietroni, F. Ponchio, B. Bickel, P. Cignoni, in:, IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE, International Center for Numerical Methods in Engineering, 2019, pp. 509–515."},"user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","external_id":{"isi":["000563497600059"]},"article_processing_charge":"No","author":[{"first_name":"Francesco","full_name":"Laccone, Francesco","last_name":"Laccone"},{"full_name":"Malomo, Luigi","last_name":"Malomo","first_name":"Luigi"},{"full_name":"Perez Rodriguez, Jesus","last_name":"Perez Rodriguez","id":"2DC83906-F248-11E8-B48F-1D18A9856A87","first_name":"Jesus"},{"full_name":"Pietroni, Nico","last_name":"Pietroni","first_name":"Nico"},{"first_name":"Federico","full_name":"Ponchio, Federico","last_name":"Ponchio"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel"},{"first_name":"Paolo","last_name":"Cignoni","full_name":"Cignoni, Paolo"}],"department":[{"_id":"BeBi"}],"title":"FlexMaps Pavilion: A twisted arc made of mesostructured flat flexible panels","_id":"9261","conference":{"name":"IASS: International Association for Shell and Spatial Structures","location":"Barcelona, Spain","end_date":"2019-10-10","start_date":"2019-10-07"},"type":"conference","status":"public","year":"2019","publication_status":"published","publication_identifier":{"issn":["2518-6582"],"isbn":["9788412110104"]},"isi":1,"language":[{"iso":"eng"}],"publication":"IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE","day":"10","page":"509-515","date_created":"2021-03-21T23:01:21Z","date_published":"2019-10-10T00:00:00Z","abstract":[{"lang":"eng","text":"Bending-active structures are able to efficiently produce complex curved shapes starting from flat panels. The desired deformation of the panels derives from the proper selection of their elastic properties. Optimized panels, called FlexMaps, are designed such that, once they are bent and assembled, the resulting static equilibrium configuration matches a desired input 3D shape. The FlexMaps elastic properties are controlled by locally varying spiraling geometric mesostructures, which are optimized in size and shape to match the global curvature (i.e., bending requests) of the target shape. The design pipeline starts from a quad mesh representing the input 3D shape, which defines the edge size and the total amount of spirals: every quad will embed one spiral. Then, an optimization algorithm tunes the geometry of the spirals by using a simplified pre-computed rod model. This rod model is derived from a non-linear regression algorithm which approximates the non-linear behavior of solid FEM spiral models subject to hundreds of load combinations. This innovative pipeline has been applied to the project of a lightweight plywood pavilion named FlexMaps Pavilion, which is a single-layer piecewise twisted arc that fits a bounding box of 3.90x3.96x3.25 meters."}],"oa_version":"None","quality_controlled":"1","scopus_import":"1","publisher":"International Center for Numerical Methods in Engineering","month":"10"},{"project":[{"name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767","_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"article_number":"157","external_id":{"isi":["000498397300007"]},"article_processing_charge":"No","author":[{"first_name":"Christian","id":"400429CC-F248-11E8-B48F-1D18A9856A87","last_name":"Hafner","full_name":"Hafner, Christian"},{"first_name":"Christian","full_name":"Schumacher, Christian","last_name":"Schumacher"},{"first_name":"Espen","full_name":"Knoop, Espen","last_name":"Knoop"},{"id":"4718F954-F248-11E8-B48F-1D18A9856A87","first_name":"Thomas","last_name":"Auzinger","full_name":"Auzinger, Thomas","orcid":"0000-0002-1546-3265"},{"last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Moritz","last_name":"Bächer","full_name":"Bächer, Moritz"}],"title":"X-CAD: Optimizing CAD Models with Extended Finite Elements","citation":{"mla":"Hafner, Christian, et al. “X-CAD: Optimizing CAD Models with Extended Finite Elements.” ACM Transactions on Graphics, vol. 38, no. 6, 157, ACM, 2019, doi:10.1145/3355089.3356576.","ieee":"C. Hafner, C. Schumacher, E. Knoop, T. Auzinger, B. Bickel, and M. Bächer, “X-CAD: Optimizing CAD Models with Extended Finite Elements,” ACM Transactions on Graphics, vol. 38, no. 6. ACM, 2019.","short":"C. Hafner, C. Schumacher, E. Knoop, T. Auzinger, B. Bickel, M. Bächer, ACM Transactions on Graphics 38 (2019).","apa":"Hafner, C., Schumacher, C., Knoop, E., Auzinger, T., Bickel, B., & Bächer, M. (2019). X-CAD: Optimizing CAD Models with Extended Finite Elements. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3355089.3356576","ama":"Hafner C, Schumacher C, Knoop E, Auzinger T, Bickel B, Bächer M. X-CAD: Optimizing CAD Models with Extended Finite Elements. ACM Transactions on Graphics. 2019;38(6). doi:10.1145/3355089.3356576","chicago":"Hafner, Christian, Christian Schumacher, Espen Knoop, Thomas Auzinger, Bernd Bickel, and Moritz Bächer. “X-CAD: Optimizing CAD Models with Extended Finite Elements.” ACM Transactions on Graphics. ACM, 2019. https://doi.org/10.1145/3355089.3356576.","ista":"Hafner C, Schumacher C, Knoop E, Auzinger T, Bickel B, Bächer M. 2019. X-CAD: Optimizing CAD Models with Extended Finite Elements. ACM Transactions on Graphics. 38(6), 157."},"user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","oa":1,"quality_controlled":"1","publisher":"ACM","date_created":"2019-11-26T14:22:09Z","date_published":"2019-11-06T00:00:00Z","doi":"10.1145/3355089.3356576","year":"2019","has_accepted_license":"1","isi":1,"publication":"ACM Transactions on Graphics","day":"06","article_type":"original","type":"journal_article","status":"public","_id":"7117","department":[{"_id":"BeBi"}],"file_date_updated":"2020-07-14T12:47:49Z","date_updated":"2024-03-27T23:30:46Z","ddc":["000"],"scopus_import":"1","intvolume":" 38","month":"11","abstract":[{"lang":"eng","text":"We propose a novel generic shape optimization method for CAD models based on the eXtended Finite Element Method (XFEM). Our method works directly on the intersection between the model and a regular simulation grid, without the need to mesh or remesh, thus removing a bottleneck of classical shape optimization strategies. This is made possible by a novel hierarchical integration scheme that accurately integrates finite element quantities with sub-element precision. For optimization, we efficiently compute analytical shape derivatives of the entire framework, from model intersection to integration rule generation and XFEM simulation. Moreover, we describe a differentiable projection of shape parameters onto a constraint manifold spanned by user-specified shape preservation, consistency, and manufacturability constraints. We demonstrate the utility of our approach by optimizing mass distribution, strength-to-weight ratio, and inverse elastic shape design objectives directly on parameterized 3D CAD models."}],"oa_version":"Submitted Version","ec_funded":1,"related_material":{"record":[{"status":"public","id":"12897","relation":"dissertation_contains"}]},"volume":38,"issue":"6","publication_status":"published","publication_identifier":{"issn":["0730-0301"]},"language":[{"iso":"eng"}],"file":[{"creator":"bbickel","date_updated":"2020-07-14T12:47:49Z","file_size":1673176,"date_created":"2019-11-26T14:24:26Z","title":"X-CAD Supplemental Material","file_name":"xcad_sup_mat_siga19.pdf","access_level":"open_access","relation":"supplementary_material","content_type":"application/pdf","file_id":"7119","checksum":"56a2fb019adcb556d2b022f5e5acb68c"},{"file_id":"7120","checksum":"5f29d76aceb5102e766cbab9b17d776e","description":"This is the author's version of the 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on IST Homepage"}]},"volume":37,"issue":"4","oa_version":"Submitted Version","abstract":[{"lang":"eng","text":"Additive manufacturing has recently seen drastic improvements in resolution, making it now possible to fabricate features at scales of hundreds or even dozens of nanometers, which previously required very expensive lithographic methods.\r\nAs a result, additive manufacturing now seems poised for optical applications, including those relevant to computer graphics, such as material design, as well as display and imaging applications.\r\n \r\nIn this work, we explore the use of additive manufacturing for generating structural colors, where the structures are designed using a fabrication-aware optimization process.\r\nThis requires a combination of full-wave simulation, a feasible parameterization of the design space, and a tailored optimization procedure.\r\nMany of these components should be re-usable for the design of other optical structures at this scale.\r\n \r\nWe show initial results of material samples fabricated based on our designs.\r\nWhile these suffer from the prototype character of state-of-the-art fabrication hardware, we believe they clearly demonstrate the potential of additive nanofabrication for structural colors and other graphics applications."}],"intvolume":" 37","month":"08","alternative_title":["ACM Transactions on Graphics"],"scopus_import":"1","ddc":["000","535","680"],"date_updated":"2023-09-11T12:46:13Z","department":[{"_id":"BeBi"}],"file_date_updated":"2020-07-14T12:45:59Z","_id":"304","pubrep_id":"1028","status":"public","type":"journal_article","publication":"ACM Transactions on Graphics","day":"01","year":"2018","has_accepted_license":"1","isi":1,"date_created":"2018-12-11T11:45:43Z","date_published":"2018-08-01T00:00:00Z","doi":"10.1145/3197517.3201376","acknowledgement":"This work was in part supported by King Abdullah University of Science and Technology Baseline Funding.","oa":1,"quality_controlled":"1","publisher":"ACM","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","citation":{"ista":"Auzinger T, Heidrich W, Bickel B. 2018. Computational design of nanostructural color for additive manufacturing. ACM Transactions on Graphics. 37(4), 159.","chicago":"Auzinger, Thomas, Wolfgang Heidrich, and Bernd Bickel. “Computational Design of Nanostructural Color for Additive Manufacturing.” ACM Transactions on Graphics. ACM, 2018. https://doi.org/10.1145/3197517.3201376.","ieee":"T. Auzinger, W. Heidrich, and B. Bickel, “Computational design of nanostructural color for additive manufacturing,” ACM Transactions on Graphics, vol. 37, no. 4. ACM, 2018.","short":"T. Auzinger, W. Heidrich, B. Bickel, ACM Transactions on Graphics 37 (2018).","apa":"Auzinger, T., Heidrich, W., & Bickel, B. (2018). Computational design of nanostructural color for additive manufacturing. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3197517.3201376","ama":"Auzinger T, Heidrich W, Bickel B. Computational design of nanostructural color for additive manufacturing. 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However, the physical fabrication constraints of the molding technique commonly restrict the shape of moldable objects. For a complex shape, a decomposition of the object into moldable parts is a common strategy to address these constraints, with plastic model kits being a popular and illustrative example. However, conducting such a decomposition requires considerable expertise, and it depends on the technical aspects of the fabrication technique, as well as aesthetic considerations. We present an interactive technique to create such decompositions for two-piece molding, in which each part of the object is cast between two rigid mold pieces. Given the surface description of an object, we decompose its thin-shell equivalent into moldable parts by first performing a coarse decomposition and then utilizing an active contour model for the boundaries between individual parts. Formulated as an optimization problem, the movement of the contours is guided by an energy reflecting fabrication constraints to ensure the moldability of each part. Simultaneously, the user is provided with editing capabilities to enforce aesthetic guidelines. Our interactive interface provides control of the contour positions by allowing, for example, the alignment of part boundaries with object features. Our technique enables a novel workflow, as it empowers novice users to explore the design space, and it generates fabrication-ready two-piece molds that can be used either for casting or industrial injection molding of free-form objects.","lang":"eng"}],"oa_version":"Submitted Version","scopus_import":"1","month":"08","intvolume":" 37","publication_status":"published","file":[{"access_level":"open_access","relation":"main_file","content_type":"application/pdf","file_id":"5360","checksum":"6a5368bc86c4e1a9fcfe588fd1f14ee8","creator":"system","date_updated":"2020-07-14T12:44:38Z","file_size":104225664,"date_created":"2018-12-12T10:18:38Z","file_name":"IST-2018-1037-v1+1_CoreCavity-AuthorVersion.pdf"},{"content_type":"application/zip","relation":"main_file","access_level":"open_access","checksum":"3861e693ba47c51f3ec7b7867d573a61","file_id":"5361","file_size":377743553,"date_updated":"2020-07-14T12:44:38Z","creator":"system","file_name":"IST-2018-1037-v1+2_CoreCavity-Supplemental.zip","date_created":"2018-12-12T10:18:39Z"},{"file_id":"5362","checksum":"490040c685ed869536e2a18f5a906b94","relation":"main_file","access_level":"open_access","content_type":"video/vnd.objectvideo","file_name":"IST-2018-1037-v1+3_CoreCavity-Video.mp4","date_created":"2018-12-12T10:18:41Z","creator":"system","file_size":162634396,"date_updated":"2020-07-14T12:44:38Z"},{"creator":"system","file_size":527972,"date_updated":"2020-07-14T12:44:38Z","file_name":"IST-2018-1037-v1+4_CoreCavity-RepresentativeImage.jpg","date_created":"2018-12-12T10:18:42Z","relation":"main_file","access_level":"open_access","content_type":"image/jpeg","file_id":"5363","checksum":"be7fc8b229adda727419b6504b3b9352"}],"language":[{"iso":"eng"}],"related_material":{"link":[{"description":"News on IST Homepage","url":"https://ist.ac.at/en/news/interactive-software-tool-makes-complex-mold-design-simple/","relation":"press_release"}]},"volume":37,"issue":"4","ec_funded":1,"article_number":"135","project":[{"name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","grant_number":"715767","call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425"},{"grant_number":"642841","name":"Distributed 3D Object Design","call_identifier":"H2020","_id":"2508E324-B435-11E9-9278-68D0E5697425"}],"citation":{"chicago":"Nakashima, Kazutaka, Thomas Auzinger, Emmanuel Iarussi, Ran Zhang, Takeo Igarashi, and Bernd Bickel. “CoreCavity: Interactive Shell Decomposition for Fabrication with Two-Piece Rigid Molds.” ACM Transaction on Graphics. ACM, 2018. https://doi.org/10.1145/3197517.3201341.","ista":"Nakashima K, Auzinger T, Iarussi E, Zhang R, Igarashi T, Bickel B. 2018. CoreCavity: Interactive shell decomposition for fabrication with two-piece rigid molds. ACM Transaction on Graphics. 37(4), 135.","mla":"Nakashima, Kazutaka, et al. “CoreCavity: Interactive Shell Decomposition for Fabrication with Two-Piece Rigid Molds.” ACM Transaction on Graphics, vol. 37, no. 4, 135, ACM, 2018, doi:10.1145/3197517.3201341.","ieee":"K. Nakashima, T. Auzinger, E. Iarussi, R. Zhang, T. Igarashi, and B. Bickel, “CoreCavity: Interactive shell decomposition for fabrication with two-piece rigid molds,” ACM Transaction on Graphics, vol. 37, no. 4. ACM, 2018.","short":"K. Nakashima, T. Auzinger, E. Iarussi, R. Zhang, T. Igarashi, B. Bickel, ACM Transaction on Graphics 37 (2018).","ama":"Nakashima K, Auzinger T, Iarussi E, Zhang R, Igarashi T, Bickel B. CoreCavity: Interactive shell decomposition for fabrication with two-piece rigid molds. 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Graph. 37 (2018).","mla":"Umetani, Nobuyuki, and Bernd Bickel. “Learning Three-Dimensional Flow for Interactive Aerodynamic Design.” ACM Trans. Graph., vol. 37, no. 4, 89, ACM, 2018, doi:10.1145/3197517.3201325.","ista":"Umetani N, Bickel B. 2018. Learning three-dimensional flow for interactive aerodynamic design. ACM Trans. Graph. 37(4), 89.","chicago":"Umetani, Nobuyuki, and Bernd Bickel. “Learning Three-Dimensional Flow for Interactive Aerodynamic Design.” ACM Trans. Graph. ACM, 2018. https://doi.org/10.1145/3197517.3201325."},"title":"Learning three-dimensional flow for interactive aerodynamic design","author":[{"first_name":"Nobuyuki","last_name":"Umetani","full_name":"Umetani, Nobuyuki"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel"}],"publist_id":"8053","external_id":{"isi":["000448185000050"]},"article_processing_charge":"No","oa_version":"Submitted Version","abstract":[{"text":"We present a data-driven technique to instantly predict how fluid flows around various three-dimensional objects. Such simulation is useful for computational fabrication and engineering, but is usually computationally expensive since it requires solving the Navier-Stokes equation for many time steps. To accelerate the process, we propose a machine learning framework which predicts aerodynamic forces and velocity and pressure fields given a threedimensional shape input. Handling detailed free-form three-dimensional shapes in a data-driven framework is challenging because machine learning approaches usually require a consistent parametrization of input and output. We present a novel PolyCube maps-based parametrization that can be computed for three-dimensional shapes at interactive rates. This allows us to efficiently learn the nonlinear response of the flow using a Gaussian process regression. We demonstrate the effectiveness of our approach for the interactive design and optimization of a car body.","lang":"eng"}],"month":"08","intvolume":" 37","scopus_import":"1","file":[{"creator":"system","date_updated":"2020-07-14T12:46:22Z","file_size":22803163,"date_created":"2018-12-12T10:16:28Z","file_name":"IST-2018-1049-v1+1_2018_sigg_Learning3DAerodynamics.pdf","access_level":"open_access","relation":"main_file","content_type":"application/pdf","checksum":"7a2243668f215821bc6aecad0320079a","file_id":"5216"}],"language":[{"iso":"eng"}],"publication_status":"published","volume":37,"related_material":{"link":[{"relation":"press_release","url":"https://ist.ac.at/en/news/new-interactive-machine-learning-tool-makes-car-designs-more-aerodynamic/","description":"News on IST Homepage"}]},"issue":"4","ec_funded":1,"_id":"4","status":"public","pubrep_id":"1049","type":"journal_article","ddc":["003","004"],"date_updated":"2023-09-13T08:46:15Z","department":[{"_id":"BeBi"}],"file_date_updated":"2020-07-14T12:46:22Z"},{"oa":1,"publisher":"ACM","quality_controlled":"1","date_created":"2018-12-11T11:44:09Z","doi":"10.1145/3197517.3201381","date_published":"2018-08-04T00:00:00Z","publication":"ACM Trans. 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Alderighi, L. Malomo, D. Giorgi, N. Pietroni, B. Bickel, P. Cignoni, ACM Trans. Graph. 37 (2018).","ieee":"T. Alderighi, L. Malomo, D. Giorgi, N. Pietroni, B. Bickel, and P. Cignoni, “Metamolds: Computational design of silicone molds,” ACM Trans. Graph., vol. 37, no. 4. ACM, 2018.","apa":"Alderighi, T., Malomo, L., Giorgi, D., Pietroni, N., Bickel, B., & Cignoni, P. (2018). Metamolds: Computational design of silicone molds. ACM Trans. Graph. ACM. https://doi.org/10.1145/3197517.3201381","ama":"Alderighi T, Malomo L, Giorgi D, Pietroni N, Bickel B, Cignoni P. Metamolds: Computational design of silicone molds. ACM Trans Graph. 2018;37(4). doi:10.1145/3197517.3201381","mla":"Alderighi, Thomas, et al. “Metamolds: Computational Design of Silicone Molds.” ACM Trans. Graph., vol. 37, no. 4, 136, ACM, 2018, doi:10.1145/3197517.3201381.","ista":"Alderighi T, Malomo L, Giorgi D, Pietroni N, Bickel B, Cignoni P. 2018. Metamolds: Computational design of silicone molds. ACM Trans. Graph. 37(4), 136.","chicago":"Alderighi, Thomas, Luigi Malomo, Daniela Giorgi, Nico Pietroni, Bernd Bickel, and Paolo Cignoni. “Metamolds: Computational Design of Silicone Molds.” ACM Trans. Graph. ACM, 2018. https://doi.org/10.1145/3197517.3201381."},"intvolume":" 37","month":"08","scopus_import":"1","oa_version":"Submitted Version","abstract":[{"text":"We propose a new method for fabricating digital objects through reusable silicone molds. Molds are generated by casting liquid silicone into custom 3D printed containers called metamolds. Metamolds automatically define the cuts that are needed to extract the cast object from the silicone mold. The shape of metamolds is designed through a novel segmentation technique, which takes into account both geometric and topological constraints involved in the process of mold casting. Our technique is simple, does not require changing the shape or topology of the input objects, and only requires off-the- shelf materials and technologies. We successfully tested our method on a set of challenging examples with complex shapes and rich geometric detail. © 2018 Association for Computing Machinery.","lang":"eng"}],"ec_funded":1,"related_material":{"link":[{"description":"News on IST Homepage","url":"https://ist.ac.at/en/news/metamolds-molding-a-mold/","relation":"press_release"}]},"issue":"4","volume":37,"language":[{"iso":"eng"}],"file":[{"file_id":"5374","checksum":"61d46273dca4de626accef1d17a0aaad","relation":"main_file","access_level":"open_access","content_type":"application/pdf","file_name":"IST-2018-1038-v1+1_metamolds_authorversion.pdf","date_created":"2018-12-12T10:18:52Z","creator":"system","file_size":91939066,"date_updated":"2020-07-14T12:44:43Z"}],"publication_status":"published","pubrep_id":"1038","status":"public","type":"journal_article","_id":"13","department":[{"_id":"BeBi"}],"file_date_updated":"2020-07-14T12:44:43Z","ddc":["004"],"date_updated":"2023-09-13T08:56:07Z"},{"article_number":"241","project":[{"call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425","grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling"},{"call_identifier":"H2020","_id":"25082902-B435-11E9-9278-68D0E5697425","grant_number":"645599","name":"Soft-bodied intelligence for Manipulation"},{"name":"ISTplus - Postdoctoral Fellowships","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","citation":{"ieee":"L. Malomo et al., “FlexMaps: Computational design of flat flexible shells for shaping 3D objects,” ACM Transactions on Graphics, vol. 37, no. 6. Association for Computing Machinery (ACM), 2018.","short":"L. Malomo, J. Perez Rodriguez, E. Iarussi, N. Pietroni, E. Miguel, P. Cignoni, B. Bickel, ACM Transactions on Graphics 37 (2018).","apa":"Malomo, L., Perez Rodriguez, J., Iarussi, E., Pietroni, N., Miguel, E., Cignoni, P., & Bickel, B. (2018). FlexMaps: Computational design of flat flexible shells for shaping 3D objects. ACM Transactions on Graphics. Association for Computing Machinery (ACM). https://doi.org/10.1145/3272127.3275076","ama":"Malomo L, Perez Rodriguez J, Iarussi E, et al. FlexMaps: Computational design of flat flexible shells for shaping 3D objects. ACM Transactions on Graphics. 2018;37(6). doi:10.1145/3272127.3275076","mla":"Malomo, Luigi, et al. “FlexMaps: Computational Design of Flat Flexible Shells for Shaping 3D Objects.” ACM Transactions on Graphics, vol. 37, no. 6, 241, Association for Computing Machinery (ACM), 2018, doi:10.1145/3272127.3275076.","ista":"Malomo L, Perez Rodriguez J, Iarussi E, Pietroni N, Miguel E, Cignoni P, Bickel B. 2018. FlexMaps: Computational design of flat flexible shells for shaping 3D objects. ACM Transactions on Graphics. 37(6), 241.","chicago":"Malomo, Luigi, Jesus Perez Rodriguez, Emmanuel Iarussi, Nico Pietroni, Eder Miguel, Paolo Cignoni, and Bernd Bickel. “FlexMaps: Computational Design of Flat Flexible Shells for Shaping 3D Objects.” ACM Transactions on Graphics. Association for Computing Machinery (ACM), 2018. https://doi.org/10.1145/3272127.3275076."},"title":"FlexMaps: Computational design of flat flexible shells for shaping 3D objects","external_id":{"isi":["000455953100064"]},"article_processing_charge":"No","author":[{"last_name":"Malomo","full_name":"Malomo, Luigi","first_name":"Luigi"},{"last_name":"Perez Rodriguez","full_name":"Perez Rodriguez, Jesus","id":"2DC83906-F248-11E8-B48F-1D18A9856A87","first_name":"Jesus"},{"id":"33F19F16-F248-11E8-B48F-1D18A9856A87","first_name":"Emmanuel","full_name":"Iarussi, Emmanuel","last_name":"Iarussi"},{"full_name":"Pietroni, Nico","last_name":"Pietroni","first_name":"Nico"},{"full_name":"Miguel, Eder","last_name":"Miguel","first_name":"Eder"},{"first_name":"Paolo","last_name":"Cignoni","full_name":"Cignoni, Paolo"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel"}],"oa":1,"quality_controlled":"1","publisher":"Association for Computing Machinery (ACM)","publication":"ACM Transactions on Graphics","day":"01","year":"2018","isi":1,"has_accepted_license":"1","date_created":"2019-02-13T13:12:53Z","doi":"10.1145/3272127.3275076","date_published":"2018-11-01T00:00:00Z","_id":"5976","pubrep_id":"1068","status":"public","type":"journal_article","article_type":"original","ddc":["000"],"date_updated":"2023-09-19T14:25:30Z","file_date_updated":"2020-07-14T12:47:14Z","department":[{"_id":"BeBi"}],"oa_version":"Published Version","abstract":[{"lang":"eng","text":"We propose FlexMaps, a novel framework for fabricating smooth shapes out of flat, flexible panels with tailored mechanical properties. We start by mapping the 3D surface onto a 2D domain as in traditional UV mapping to design a set of deformable flat panels called FlexMaps. For these panels, we design and obtain specific mechanical properties such that, once they are assembled, the static equilibrium configuration matches the desired 3D shape. FlexMaps can be fabricated from an almost rigid material, such as wood or plastic, and are made flexible in a controlled way by using computationally designed spiraling microstructures."}],"intvolume":" 37","month":"11","scopus_import":"1","language":[{"iso":"eng"}],"file":[{"content_type":"application/pdf","access_level":"open_access","relation":"main_file","checksum":"d0529a41c78b37ab8840685579fb33b4","file_id":"6901","date_updated":"2020-07-14T12:47:14Z","file_size":100109811,"creator":"bbickel","date_created":"2019-09-23T12:48:52Z","file_name":"flexmaps_author_version.pdf"}],"publication_status":"published","publication_identifier":{"issn":["0730-0301"]},"ec_funded":1,"volume":37,"issue":"6"},{"title":"State of the art on stylized fabrication","author":[{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel"},{"first_name":"Paolo","last_name":"Cignoni","full_name":"Cignoni, Paolo"},{"last_name":"Malomo","full_name":"Malomo, Luigi","first_name":"Luigi"},{"first_name":"Nico","full_name":"Pietroni, Nico","last_name":"Pietroni"}],"article_processing_charge":"No","external_id":{"isi":["000437272800019"]},"user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","citation":{"mla":"Bickel, Bernd, et al. “State of the Art on Stylized Fabrication.” Computer Graphics Forum, vol. 37, no. 6, Wiley, 2018, pp. 325–42, doi:10.1111/cgf.13327.","short":"B. Bickel, P. Cignoni, L. Malomo, N. Pietroni, Computer Graphics Forum 37 (2018) 325–342.","ieee":"B. Bickel, P. Cignoni, L. Malomo, and N. Pietroni, “State of the art on stylized fabrication,” Computer Graphics Forum, vol. 37, no. 6. Wiley, pp. 325–342, 2018.","apa":"Bickel, B., Cignoni, P., Malomo, L., & Pietroni, N. (2018). State of the art on stylized fabrication. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.13327","ama":"Bickel B, Cignoni P, Malomo L, Pietroni N. State of the art on stylized fabrication. Computer Graphics Forum. 2018;37(6):325-342. doi:10.1111/cgf.13327","chicago":"Bickel, Bernd, Paolo Cignoni, Luigi Malomo, and Nico Pietroni. “State of the Art on Stylized Fabrication.” Computer Graphics Forum. Wiley, 2018. https://doi.org/10.1111/cgf.13327.","ista":"Bickel B, Cignoni P, Malomo L, Pietroni N. 2018. State of the art on stylized fabrication. Computer Graphics Forum. 37(6), 325–342."},"project":[{"_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling"}],"date_published":"2018-09-01T00:00:00Z","doi":"10.1111/cgf.13327","date_created":"2019-02-14T13:52:25Z","page":"325-342","day":"01","publication":"Computer Graphics Forum","isi":1,"has_accepted_license":"1","year":"2018","publisher":"Wiley","quality_controlled":"1","oa":1,"department":[{"_id":"BeBi"}],"file_date_updated":"2020-07-14T12:47:15Z","ddc":["004"],"date_updated":"2023-09-19T14:33:40Z","status":"public","pubrep_id":"1051","type":"journal_article","_id":"6003","issue":"6","volume":37,"ec_funded":1,"file":[{"date_updated":"2020-07-14T12:47:15Z","file_size":6209349,"creator":"kschuh","date_created":"2019-02-14T14:09:28Z","file_name":"StylizedFabricationSTAR-Personal.pdf","content_type":"application/pdf","access_level":"open_access","relation":"main_file","checksum":"d2bbe5c658d8159fbe9016a4f5e82b19","file_id":"6004"}],"language":[{"iso":"eng"}],"publication_identifier":{"issn":["0167-7055"]},"publication_status":"published","month":"09","intvolume":" 37","scopus_import":"1","oa_version":"Submitted Version","abstract":[{"text":"Digital fabrication devices are powerful tools for creating tangible reproductions of 3D digital models. Most available printing technologies aim at producing an accurate copy of a tridimensional shape. However, fabrication technologies can also be used to create a stylistic representation of a digital shape. We refer to this class of methods as ‘stylized fabrication methods’. These methods abstract geometric and physical features of a given shape to create an unconventional representation, to produce an optical illusion or to devise a particular interaction with the fabricated model. In this state‐of‐the‐art report, we classify and overview this broad and emerging class of approaches and also propose possible directions for future research.","lang":"eng"}]},{"year":"2018","publication_status":"published","publication_identifier":{"isbn":["9781538630815"]},"isi":1,"language":[{"iso":"eng"}],"day":"10","date_created":"2019-04-04T09:50:38Z","doi":"10.1109/icra.2018.8461106","date_published":"2018-09-10T00:00:00Z","abstract":[{"text":"In the context of robotic manipulation and grasping, the shift from a view that is static (force closure of a single posture) and contact-deprived (only contact for force closure is allowed, everything else is obstacle) towards a view that is dynamic and contact-rich (soft manipulation) has led to an increased interest in soft hands. These hands can easily exploit environmental constraints and object surfaces without risk, and safely interact with humans, but present also some challenges. Designing them is difficult, as well as predicting, modelling, and “programming” their interactions with the objects and the environment. This paper tackles the problem of simulating them in a fast and effective way, leveraging on novel and existing simulation technologies. We present a triple-layered simulation framework where dynamic properties such as stiffness are determined from slow but accurate FEM simulation data once, and then condensed into a lumped parameter model that can be used to fast simulate soft fingers and soft hands. We apply our approach to the simulation of soft pneumatic fingers.","lang":"eng"}],"oa_version":"None","scopus_import":"1","quality_controlled":"1","publisher":"IEEE","month":"09","citation":{"chicago":"Pozzi, Maria, Eder Miguel Villalba, Raphael Deimel, Monica Malvezzi, Bernd Bickel, Oliver Brock, and Domenico Prattichizzo. “Efficient FEM-Based Simulation of Soft Robots Modeled as Kinematic Chains.” IEEE, 2018. https://doi.org/10.1109/icra.2018.8461106.","ista":"Pozzi M, Miguel Villalba E, Deimel R, Malvezzi M, Bickel B, Brock O, Prattichizzo D. 2018. Efficient FEM-based simulation of soft robots modeled as kinematic chains. ICRA: International Conference on Robotics and Automation, 8461106.","mla":"Pozzi, Maria, et al. Efficient FEM-Based Simulation of Soft Robots Modeled as Kinematic Chains. 8461106, IEEE, 2018, doi:10.1109/icra.2018.8461106.","ieee":"M. Pozzi et al., “Efficient FEM-based simulation of soft robots modeled as kinematic chains,” presented at the ICRA: International Conference on Robotics and Automation, Brisbane, Australia, 2018.","short":"M. Pozzi, E. Miguel Villalba, R. Deimel, M. Malvezzi, B. Bickel, O. Brock, D. Prattichizzo, in:, IEEE, 2018.","apa":"Pozzi, M., Miguel Villalba, E., Deimel, R., Malvezzi, M., Bickel, B., Brock, O., & Prattichizzo, D. (2018). Efficient FEM-based simulation of soft robots modeled as kinematic chains. Presented at the ICRA: International Conference on Robotics and Automation, Brisbane, Australia: IEEE. https://doi.org/10.1109/icra.2018.8461106","ama":"Pozzi M, Miguel Villalba E, Deimel R, et al. Efficient FEM-based simulation of soft robots modeled as kinematic chains. In: IEEE; 2018. doi:10.1109/icra.2018.8461106"},"date_updated":"2023-09-19T14:49:03Z","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","external_id":{"isi":["000446394503031"]},"article_processing_charge":"No","author":[{"first_name":"Maria","full_name":"Pozzi, Maria","last_name":"Pozzi"},{"id":"3FB91342-F248-11E8-B48F-1D18A9856A87","first_name":"Eder","full_name":"Miguel Villalba, Eder","orcid":"0000-0001-5665-0430","last_name":"Miguel Villalba"},{"last_name":"Deimel","full_name":"Deimel, Raphael","first_name":"Raphael"},{"full_name":"Malvezzi, Monica","last_name":"Malvezzi","first_name":"Monica"},{"last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Brock","full_name":"Brock, Oliver","first_name":"Oliver"},{"full_name":"Prattichizzo, Domenico","last_name":"Prattichizzo","first_name":"Domenico"}],"department":[{"_id":"BeBi"}],"title":"Efficient FEM-based simulation of soft robots modeled as kinematic chains","_id":"6195","article_number":"8461106","conference":{"end_date":"2018-05-25","location":"Brisbane, Australia","start_date":"2018-05-21","name":"ICRA: International Conference on Robotics and Automation"},"type":"conference","status":"public"},{"date_updated":"2022-03-18T12:55:28Z","citation":{"mla":"Bächer, Moritz, et al. “Spin It: Optimizing Moment of Inertia for Spinnable Objects.” Communications of the ACM, vol. 60, no. 8, ACM, 2017, pp. 92–99, doi:10.1145/3068766.","short":"M. Bächer, B. Bickel, E. Whiting, O. Sorkine Hornung, Communications of the ACM 60 (2017) 92–99.","ieee":"M. Bächer, B. Bickel, E. Whiting, and O. Sorkine Hornung, “Spin it: Optimizing moment of inertia for spinnable objects,” Communications of the ACM, vol. 60, no. 8. ACM, pp. 92–99, 2017.","ama":"Bächer M, Bickel B, Whiting E, Sorkine Hornung O. Spin it: Optimizing moment of inertia for spinnable objects. Communications of the ACM. 2017;60(8):92-99. doi:10.1145/3068766","apa":"Bächer, M., Bickel, B., Whiting, E., & Sorkine Hornung, O. (2017). Spin it: Optimizing moment of inertia for spinnable objects. Communications of the ACM. ACM. https://doi.org/10.1145/3068766","chicago":"Bächer, Moritz, Bernd Bickel, Emily Whiting, and Olga Sorkine Hornung. “Spin It: Optimizing Moment of Inertia for Spinnable Objects.” Communications of the ACM. ACM, 2017. https://doi.org/10.1145/3068766.","ista":"Bächer M, Bickel B, Whiting E, Sorkine Hornung O. 2017. Spin it: Optimizing moment of inertia for spinnable objects. Communications of the ACM. 60(8), 92–99."},"extern":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publist_id":"7370","author":[{"last_name":"Bächer","full_name":"Bächer, Moritz","first_name":"Moritz"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd"},{"full_name":"Whiting, Emily","last_name":"Whiting","first_name":"Emily"},{"full_name":"Sorkine Hornung, Olga","last_name":"Sorkine Hornung","first_name":"Olga"}],"article_processing_charge":"No","title":"Spin it: Optimizing moment of inertia for spinnable objects","_id":"452","type":"journal_article","status":"public","year":"2017","publication_status":"published","day":"01","language":[{"iso":"eng"}],"publication":"Communications of the ACM","page":"92 - 99","doi":"10.1145/3068766","date_published":"2017-08-01T00:00:00Z","volume":60,"issue":"8","date_created":"2018-12-11T11:46:33Z","abstract":[{"text":"Spinning tops and yo-yos have long fascinated cultures around the world with their unexpected, graceful motions that seemingly elude gravity. Yet, due to the exceeding difficulty of creating stably spinning objects of asymmetric shape in a manual trial-and-error process, there has been little departure from rotationally symmetric designs. With modern 3D printing technologies, however, we can manufacture shapes of almost unbounded complexity at the press of a button, shifting this design complexity toward computation. In this article, we describe an algorithm to generate designs for spinning objects by optimizing their mass distribution: as input, the user provides a solid 3D model and a desired axis of rotation. Our approach then modifies the interior mass distribution such that the principal directions of the moment of inertia align with the target rotation frame. To create voids inside the model, we represent its volume with an adaptive multiresolution voxelization and optimize the discrete voxel fill values using a continuous, nonlinear formulation. We further optimize for rotational stability by maximizing the dominant principal moment. Our method is well-suited for a variety of 3D printed models, ranging from characters to abstract shapes. We demonstrate tops and yo-yos that spin surprisingly stably despite their asymmetric appearance.","lang":"eng"}],"oa_version":"None","acknowledgement":"This project was supported in part by the ERC Starting Grant iModel (StG-2012-306877). Emily Whiting was supported by the ETH Zurich/Marie Curie COFUND Postdoctoral Fellowship. \r\nFirst and foremost, we would like to thank our editor Steve Marschner for his invaluable feedback. We were fortunate to get further help from Maurizio Nitti for model design, Romain Prévost for Make-It-Stand comparisons, Alexander Sorkine-Hornung, Kaan Yücer, and Changil Kim for video and photo assistance, Ronnie Gänsli for metal casting, Alec Jacobson for the posed Elephant and Armadillo models, and Romain Prévost and Amit Bermano for print preparation. Model sources include: Woven Ring: generated by “Sculpture Generator 1” by Carlo H. Séquin, UC Berkeley; Elephant: De Espona model library, courtesy of Robert Sumner; T-Rex: TurboSquid; Armadillo: Stanford Computer Graphics Laboratory; and Utah Teapot: Martin Newell, University of Utah. ","publisher":"ACM","scopus_import":"1","month":"08","intvolume":" 60"},{"related_material":{"record":[{"status":"public","id":"8386","relation":"dissertation_contains"}]},"issue":"6","volume":36,"ec_funded":1,"publication_identifier":{"issn":["07300301"]},"publication_status":"published","file":[{"checksum":"48386fa6956c3645fc89594dc898b147","file_id":"4836","relation":"main_file","access_level":"open_access","content_type":"application/pdf","file_name":"IST-2018-1052-v1+1_ElekSumin2017SGA.pdf","date_created":"2018-12-12T10:10:46Z","creator":"system","file_size":107349827,"date_updated":"2020-07-14T12:46:35Z"},{"date_updated":"2020-07-14T12:46:35Z","file_size":4683145,"creator":"bbickel","date_created":"2019-12-16T14:48:57Z","file_name":"ElekSumin2017SGA_reduced_file_size.pdf","content_type":"application/pdf","access_level":"open_access","relation":"main_file","file_id":"7189","checksum":"21c89c28fb8d70f6602f752bf997aa0f"}],"language":[{"iso":"eng"}],"scopus_import":1,"month":"11","intvolume":" 36","abstract":[{"text":"Color texture reproduction in 3D printing commonly ignores volumetric light transport (cross-talk) between surface points on a 3D print. Such light diffusion leads to significant blur of details and color bleeding, and is particularly severe for highly translucent resin-based print materials. Given their widely varying scattering properties, this cross-talk between surface points strongly depends on the internal structure of the volume surrounding each surface point. Existing scattering-aware methods use simplified models for light diffusion, and often accept the visual blur as an immutable property of the print medium. In contrast, our work counteracts heterogeneous scattering to obtain the impression of a crisp albedo texture on top of the 3D print, by optimizing for a fully volumetric material distribution that preserves the target appearance. Our method employs an efficient numerical optimizer on top of a general Monte-Carlo simulation of heterogeneous scattering, supported by a practical calibration procedure to obtain scattering parameters from a given set of printer materials. Despite the inherent translucency of the medium, we reproduce detailed surface textures on 3D prints. We evaluate our system using a commercial, five-tone 3D print process and compare against the printer’s native color texturing mode, demonstrating that our method preserves high-frequency features well without having to compromise on color gamut.","lang":"eng"}],"oa_version":"Submitted Version","file_date_updated":"2020-07-14T12:46:35Z","department":[{"_id":"BeBi"}],"date_updated":"2023-09-07T13:11:15Z","ddc":["003","000","005"],"type":"journal_article","article_type":"original","status":"public","pubrep_id":"1052","_id":"486","date_published":"2017-11-20T00:00:00Z","doi":"10.1145/3130800.3130890","date_created":"2018-12-11T11:46:44Z","has_accepted_license":"1","year":"2017","day":"20","publication":"ACM Transactions on Graphics","publisher":"ACM","quality_controlled":"1","oa":1,"publist_id":"7334","author":[{"first_name":"Oskar","last_name":"Elek","full_name":"Elek, Oskar"},{"first_name":"Denis","full_name":"Sumin, Denis","last_name":"Sumin"},{"orcid":"0000-0002-3808-281X","full_name":"Zhang, Ran","last_name":"Zhang","id":"4DDBCEB0-F248-11E8-B48F-1D18A9856A87","first_name":"Ran"},{"first_name":"Tim","full_name":"Weyrich, Tim","last_name":"Weyrich"},{"first_name":"Karol","full_name":"Myszkowski, Karol","last_name":"Myszkowski"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd"},{"last_name":"Wilkie","full_name":"Wilkie, Alexander","first_name":"Alexander"},{"full_name":"Krivanek, Jaroslav","last_name":"Krivanek","first_name":"Jaroslav"}],"article_processing_charge":"No","title":"Scattering-aware texture reproduction for 3D printing","citation":{"ista":"Elek O, Sumin D, Zhang R, Weyrich T, Myszkowski K, Bickel B, Wilkie A, Krivanek J. 2017. Scattering-aware texture reproduction for 3D printing. ACM Transactions on Graphics. 36(6), 241.","chicago":"Elek, Oskar, Denis Sumin, Ran Zhang, Tim Weyrich, Karol Myszkowski, Bernd Bickel, Alexander Wilkie, and Jaroslav Krivanek. “Scattering-Aware Texture Reproduction for 3D Printing.” ACM Transactions on Graphics. ACM, 2017. https://doi.org/10.1145/3130800.3130890.","apa":"Elek, O., Sumin, D., Zhang, R., Weyrich, T., Myszkowski, K., Bickel, B., … Krivanek, J. (2017). Scattering-aware texture reproduction for 3D printing. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3130800.3130890","ama":"Elek O, Sumin D, Zhang R, et al. Scattering-aware texture reproduction for 3D printing. ACM Transactions on Graphics. 2017;36(6). doi:10.1145/3130800.3130890","ieee":"O. Elek et al., “Scattering-aware texture reproduction for 3D printing,” ACM Transactions on Graphics, vol. 36, no. 6. ACM, 2017.","short":"O. Elek, D. Sumin, R. Zhang, T. Weyrich, K. Myszkowski, B. Bickel, A. Wilkie, J. Krivanek, ACM Transactions on Graphics 36 (2017).","mla":"Elek, Oskar, et al. “Scattering-Aware Texture Reproduction for 3D Printing.” ACM Transactions on Graphics, vol. 36, no. 6, 241, ACM, 2017, doi:10.1145/3130800.3130890."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","project":[{"grant_number":"642841","name":"Distributed 3D Object Design","_id":"2508E324-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"},{"call_identifier":"H2020","_id":"24F9549A-B435-11E9-9278-68D0E5697425","grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling"},{"grant_number":"291734","name":"International IST Postdoc Fellowship Programme","_id":"25681D80-B435-11E9-9278-68D0E5697425","call_identifier":"FP7"}],"article_number":"241"},{"volume":36,"issue":"4","related_material":{"record":[{"relation":"dissertation_contains","id":"8386","status":"public"}]},"ec_funded":1,"publication_identifier":{"issn":["07300301"]},"publication_status":"published","file":[{"date_created":"2018-12-12T10:09:05Z","file_name":"IST-2018-1050-v1+1_MechRet.pdf","date_updated":"2018-12-12T10:09:05Z","file_size":25463895,"creator":"system","file_id":"4728","content_type":"application/pdf","access_level":"open_access","relation":"main_file"}],"language":[{"iso":"eng"}],"alternative_title":["ACM Transactions on Graphics"],"scopus_import":"1","month":"06","intvolume":" 36","abstract":[{"text":" We present an interactive design system to create functional mechanical objects. Our computational approach allows novice users to retarget an existing mechanical template to a user-specified input shape. Our proposed representation for a mechanical template encodes a parameterized mechanism, mechanical constraints that ensure a physically valid configuration, spatial relationships of mechanical parts to the user-provided shape, and functional constraints that specify an intended functionality. We provide an intuitive interface and optimization-in-the-loop approach for finding a valid configuration of the mechanism and the shape to ensure that higher-level functional goals are met. Our algorithm interactively optimizes the mechanism while the user manipulates the placement of mechanical components and the shape. Our system allows users to efficiently explore various design choices and to synthesize customized mechanical objects that can be fabricated with rapid prototyping technologies. We demonstrate the efficacy of our approach by retargeting various mechanical templates to different shapes and fabricating the resulting functional mechanical objects.\r\n","lang":"eng"}],"oa_version":"Submitted Version","file_date_updated":"2018-12-12T10:09:05Z","department":[{"_id":"BeBi"}],"date_updated":"2023-09-22T09:49:31Z","ddc":["003","004"],"type":"conference","conference":{"name":"SIGGRAPH: Computer Graphics and Interactive Techniques","start_date":"2017-07-30","end_date":"2017-08-03","location":"Los Angeles, CA, United States "},"status":"public","pubrep_id":"1050","_id":"1002","date_published":"2017-06-01T00:00:00Z","doi":"10.1145/3072959.3073710","date_created":"2018-12-11T11:49:38Z","isi":1,"has_accepted_license":"1","year":"2017","day":"01","publisher":"ACM","quality_controlled":"1","oa":1,"publist_id":"6396","author":[{"id":"4DDBCEB0-F248-11E8-B48F-1D18A9856A87","first_name":"Ran","last_name":"Zhang","orcid":"0000-0002-3808-281X","full_name":"Zhang, Ran"},{"first_name":"Thomas","id":"4718F954-F248-11E8-B48F-1D18A9856A87","last_name":"Auzinger","full_name":"Auzinger, Thomas","orcid":"0000-0002-1546-3265"},{"first_name":"Duygu","last_name":"Ceylan","full_name":"Ceylan, Duygu"},{"full_name":"Li, Wilmot","last_name":"Li","first_name":"Wilmot"},{"orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"}],"external_id":{"isi":["000406432100049"]},"article_processing_charge":"No","title":"Functionality-aware retargeting of mechanisms to 3D shapes","citation":{"chicago":"Zhang, Ran, Thomas Auzinger, Duygu Ceylan, Wilmot Li, and Bernd Bickel. “Functionality-Aware Retargeting of Mechanisms to 3D Shapes,” Vol. 36. ACM, 2017. https://doi.org/10.1145/3072959.3073710.","ista":"Zhang R, Auzinger T, Ceylan D, Li W, Bickel B. 2017. Functionality-aware retargeting of mechanisms to 3D shapes. SIGGRAPH: Computer Graphics and Interactive Techniques, ACM Transactions on Graphics, vol. 36, 81.","mla":"Zhang, Ran, et al. Functionality-Aware Retargeting of Mechanisms to 3D Shapes. Vol. 36, no. 4, 81, ACM, 2017, doi:10.1145/3072959.3073710.","apa":"Zhang, R., Auzinger, T., Ceylan, D., Li, W., & Bickel, B. (2017). Functionality-aware retargeting of mechanisms to 3D shapes (Vol. 36). Presented at the SIGGRAPH: Computer Graphics and Interactive Techniques, Los Angeles, CA, United States : ACM. https://doi.org/10.1145/3072959.3073710","ama":"Zhang R, Auzinger T, Ceylan D, Li W, Bickel B. Functionality-aware retargeting of mechanisms to 3D shapes. In: Vol 36. ACM; 2017. doi:10.1145/3072959.3073710","short":"R. Zhang, T. Auzinger, D. Ceylan, W. Li, B. Bickel, in:, ACM, 2017.","ieee":"R. Zhang, T. Auzinger, D. Ceylan, W. Li, and B. Bickel, “Functionality-aware retargeting of mechanisms to 3D shapes,” presented at the SIGGRAPH: Computer Graphics and Interactive Techniques, Los Angeles, CA, United States , 2017, vol. 36, no. 4."},"user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","project":[{"call_identifier":"H2020","_id":"2508E324-B435-11E9-9278-68D0E5697425","grant_number":"642841","name":"Distributed 3D Object Design"},{"grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"article_number":"81"},{"external_id":{"isi":["000406432100032"]},"article_processing_charge":"No","author":[{"first_name":"Ruslan","id":"3AB45EE2-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-9819-5077","full_name":"Guseinov, Ruslan","last_name":"Guseinov"},{"last_name":"Miguel","full_name":"Miguel, Eder","first_name":"Eder"},{"last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"}],"publist_id":"6397","title":"CurveUps: Shaping objects from flat plates with tension-actuated curvature","citation":{"chicago":"Guseinov, Ruslan, Eder Miguel, and Bernd Bickel. “CurveUps: Shaping Objects from Flat Plates with Tension-Actuated Curvature,” Vol. 36. ACM, 2017. https://doi.org/10.1145/3072959.3073709.","ista":"Guseinov R, Miguel E, Bickel B. 2017. CurveUps: Shaping objects from flat plates with tension-actuated curvature. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, ACM Transactions on Graphics, vol. 36, 64.","mla":"Guseinov, Ruslan, et al. CurveUps: Shaping Objects from Flat Plates with Tension-Actuated Curvature. Vol. 36, no. 4, 64, ACM, 2017, doi:10.1145/3072959.3073709.","ama":"Guseinov R, Miguel E, Bickel B. CurveUps: Shaping objects from flat plates with tension-actuated curvature. In: Vol 36. ACM; 2017. doi:10.1145/3072959.3073709","apa":"Guseinov, R., Miguel, E., & Bickel, B. (2017). CurveUps: Shaping objects from flat plates with tension-actuated curvature (Vol. 36). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States: ACM. https://doi.org/10.1145/3072959.3073709","ieee":"R. Guseinov, E. Miguel, and B. Bickel, “CurveUps: Shaping objects from flat plates with tension-actuated curvature,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States, 2017, vol. 36, no. 4.","short":"R. Guseinov, E. Miguel, B. Bickel, in:, ACM, 2017."},"user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","project":[{"grant_number":"645599","name":"Soft-bodied intelligence for Manipulation","_id":"25082902-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"},{"grant_number":"715767","name":"MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling","_id":"24F9549A-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"}],"article_number":"64","date_created":"2018-12-11T11:49:38Z","date_published":"2017-01-01T00:00:00Z","doi":"10.1145/3072959.3073709","year":"2017","isi":1,"has_accepted_license":"1","day":"01","oa":1,"publisher":"ACM","quality_controlled":"1","file_date_updated":"2018-12-12T10:10:24Z","department":[{"_id":"BeBi"}],"date_updated":"2023-09-22T09:49:58Z","ddc":["003","004"],"conference":{"name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques","start_date":"2017-08-19","location":"Los Angeles, CA, United States","end_date":"2017-08-25"},"type":"conference","pubrep_id":"1053","status":"public","_id":"1001","ec_funded":1,"issue":"4","related_material":{"record":[{"relation":"dissertation_contains","status":"public","id":"8366"}]},"volume":36,"publication_status":"published","language":[{"iso":"eng"}],"file":[{"date_created":"2018-12-12T10:10:24Z","file_name":"IST-2018-1053-v1+1_CurveUp.pdf","creator":"system","date_updated":"2018-12-12T10:10:24Z","file_size":36159696,"file_id":"4811","access_level":"open_access","relation":"main_file","content_type":"application/pdf"}],"alternative_title":["ACM Transactions on Graphics"],"intvolume":" 36","month":"01","abstract":[{"text":"We present a computational approach for designing CurveUps, curvy shells that form from an initially flat state. They consist of small rigid tiles that are tightly held together by two pre-stretched elastic sheets attached to them. Our method allows the realization of smooth, doubly curved surfaces that can be fabricated as a flat piece. Once released, the restoring forces of the pre-stretched sheets support the object to take shape in 3D. CurveUps are structurally stable in their target configuration. The design process starts with a target surface. Our method generates a tile layout in 2D and optimizes the distribution, shape, and attachment areas of the tiles to obtain a configuration that is fabricable and in which the curved up state closely matches the target. Our approach is based on an efficient approximate model and a local optimization strategy for an otherwise intractable nonlinear optimization problem. We demonstrate the effectiveness of our approach for a wide range of shapes, all realized as physical prototypes.","lang":"eng"}],"oa_version":"Submitted Version"},{"date_updated":"2021-01-12T06:48:15Z","ddc":["006"],"file_date_updated":"2018-12-12T10:17:42Z","department":[{"_id":"BeBi"}],"_id":"1097","type":"conference","conference":{"name":"SIGGRAPH Asia: Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia","start_date":"2016-12-05","location":"Macao, China","end_date":"2016-12-08"},"status":"public","pubrep_id":"759","publication_status":"published","file":[{"file_id":"5298","access_level":"open_access","relation":"main_file","content_type":"application/pdf","date_created":"2018-12-12T10:17:42Z","file_name":"IST-2017-759-v1+1_copter.pdf","creator":"system","date_updated":"2018-12-12T10:17:42Z","file_size":33114420}],"language":[{"iso":"eng"}],"volume":35,"issue":"6","ec_funded":1,"abstract":[{"lang":"eng","text":"We present an interactive system for computational design, optimization, and fabrication of multicopters. Our computational approach allows non-experts to design, explore, and evaluate a wide range of different multicopters. We provide users with an intuitive interface for assembling a multicopter from a collection of components (e.g., propellers, motors, and carbon fiber rods). Our algorithm interactively optimizes shape and controller parameters of the current design to ensure its proper operation. In addition, we allow incorporating a variety of other metrics (such as payload, battery usage, size, and cost) into the design process and exploring tradeoffs between them. We show the efficacy of our method and system by designing, optimizing, fabricating, and operating multicopters with complex geometries and propeller configurations. We also demonstrate the ability of our optimization algorithm to improve the multicopter performance under different metrics."}],"oa_version":"Submitted Version","alternative_title":["ACM Transactions on Graphics"],"scopus_import":1,"month":"11","intvolume":" 35","citation":{"ieee":"T. Du, A. Schulz, B. Zhu, B. Bickel, and W. Matusik, “Computational multicopter design,” presented at the SIGGRAPH Asia: Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia, Macao, China, 2016, vol. 35, no. 6.","short":"T. Du, A. Schulz, B. Zhu, B. Bickel, W. Matusik, in:, ACM, 2016.","ama":"Du T, Schulz A, Zhu B, Bickel B, Matusik W. Computational multicopter design. In: Vol 35. ACM; 2016. doi:10.1145/2980179.2982427","apa":"Du, T., Schulz, A., Zhu, B., Bickel, B., & Matusik, W. (2016). Computational multicopter design (Vol. 35). Presented at the SIGGRAPH Asia: Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia, Macao, China: ACM. https://doi.org/10.1145/2980179.2982427","mla":"Du, Tao, et al. Computational Multicopter Design. Vol. 35, no. 6, 227, ACM, 2016, doi:10.1145/2980179.2982427.","ista":"Du T, Schulz A, Zhu B, Bickel B, Matusik W. 2016. Computational multicopter design. SIGGRAPH Asia: Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia, ACM Transactions on Graphics, vol. 35, 227.","chicago":"Du, Tao, Adriana Schulz, Bo Zhu, Bernd Bickel, and Wojciech Matusik. “Computational Multicopter Design,” Vol. 35. ACM, 2016. https://doi.org/10.1145/2980179.2982427."},"user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","publist_id":"6278","author":[{"first_name":"Tao","last_name":"Du","full_name":"Du, Tao"},{"first_name":"Adriana","last_name":"Schulz","full_name":"Schulz, Adriana"},{"first_name":"Bo","full_name":"Zhu, Bo","last_name":"Zhu"},{"orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Wojciech","full_name":"Matusik, Wojciech","last_name":"Matusik"}],"title":"Computational multicopter design","article_number":"227","project":[{"name":"Soft-bodied intelligence for Manipulation","grant_number":"645599","call_identifier":"H2020","_id":"25082902-B435-11E9-9278-68D0E5697425"}],"has_accepted_license":"1","year":"2016","day":"01","date_published":"2016-11-01T00:00:00Z","doi":"10.1145/2980179.2982427","date_created":"2018-12-11T11:50:07Z","acknowledgement":"We thank Nobuyuki Umetani for his insightful suggestions in our discussions. We thank Alan Schultz and his colleagues at NRL for building the hexacopter and for the valuable discussions. We thank Randall Davis, Boris Katz, and Howard Shrobe at MIT for their advice. We are grateful to Nick Bandiera for preprocessing mechanical parts and providing 3D printing technical support; Charles Blouin from RCBenchmark for dynamometer hardware support; Brian Saavedra for the composition UI; Yingzhe Yuan for data acquisition and video recording in the experiments; Michael Foshey and David Kim for their comments on the draft of the paper. \r\n\r\n\r\nThis work was partially supported by Air Force Research Laboratory’s sponsorship of Julia: A Fresh Approach to Technical Computing and Data Processing (Sponsor Award ID FA8750-15-2- 0272, MIT Award ID 024831-00003), and NSF Expedition project (Sponsor Award ID CCF-1138967, MIT Award ID 020610-00002). The views expressed herein are not endorsed by the sponsors. This project has also received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 645599. ","publisher":"ACM","quality_controlled":"1","oa":1},{"title":"FlexMolds: Automatic design of flexible shells for molding","author":[{"last_name":"Malomo","full_name":"Malomo, Luigi","first_name":"Luigi"},{"first_name":"Nico","last_name":"Pietroni","full_name":"Pietroni, Nico"},{"full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Cignoni","full_name":"Cignoni, Paolo","first_name":"Paolo"}],"publist_id":"6276","user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","citation":{"apa":"Malomo, L., Pietroni, N., Bickel, B., & Cignoni, P. (2016). FlexMolds: Automatic design of flexible shells for molding (Vol. 35). Presented at the SIGGRAPH Asia: Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia, Macao, China: ACM. https://doi.org/10.1145/2980179.2982397","ama":"Malomo L, Pietroni N, Bickel B, Cignoni P. FlexMolds: Automatic design of flexible shells for molding. In: Vol 35. ACM; 2016. doi:10.1145/2980179.2982397","ieee":"L. Malomo, N. Pietroni, B. Bickel, and P. Cignoni, “FlexMolds: Automatic design of flexible shells for molding,” presented at the SIGGRAPH Asia: Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia, Macao, China, 2016, vol. 35, no. 6.","short":"L. Malomo, N. Pietroni, B. Bickel, P. Cignoni, in:, ACM, 2016.","mla":"Malomo, Luigi, et al. FlexMolds: Automatic Design of Flexible Shells for Molding. Vol. 35, no. 6, 223, ACM, 2016, doi:10.1145/2980179.2982397.","ista":"Malomo L, Pietroni N, Bickel B, Cignoni P. 2016. FlexMolds: Automatic design of flexible shells for molding. SIGGRAPH Asia: Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia, ACM Transactions on Graphics, vol. 35, 223.","chicago":"Malomo, Luigi, Nico Pietroni, Bernd Bickel, and Paolo Cignoni. “FlexMolds: Automatic Design of Flexible Shells for Molding,” Vol. 35. ACM, 2016. https://doi.org/10.1145/2980179.2982397."},"project":[{"_id":"25082902-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"645599","name":"Soft-bodied intelligence for Manipulation"}],"article_number":"223","date_created":"2018-12-11T11:50:08Z","date_published":"2016-11-01T00:00:00Z","doi":"10.1145/2980179.2982397","day":"01","year":"2016","has_accepted_license":"1","oa":1,"quality_controlled":"1","publisher":"ACM","acknowledgement":"The armadillo, bunny and dragon models are courtesy of the Stanford 3D Scanning Repository. The bimba, fertility and elephant models are courtesy of the AIM@SHAPE Shape Repository. \r\nThis project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement\r\nNo. 645599.","department":[{"_id":"BeBi"}],"file_date_updated":"2018-12-12T10:12:01Z","ddc":["000","005"],"date_updated":"2021-01-12T06:48:16Z","pubrep_id":"760","status":"public","conference":{"name":"SIGGRAPH Asia: Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia","end_date":"2016-12-08","location":"Macao, China","start_date":"2016-12-05"},"type":"conference","_id":"1099","ec_funded":1,"volume":35,"issue":"6","language":[{"iso":"eng"}],"file":[{"file_id":"4918","content_type":"application/pdf","relation":"main_file","access_level":"open_access","file_name":"IST-2017-760-v1+1_flexmolds.pdf","date_created":"2018-12-12T10:12:01Z","file_size":11122029,"date_updated":"2018-12-12T10:12:01Z","creator":"system"}],"publication_status":"published","intvolume":" 35","month":"11","scopus_import":1,"alternative_title":["ACM Transactions on Graphics"],"oa_version":"Submitted Version","abstract":[{"lang":"eng","text":"We present FlexMolds, a novel computational approach to automatically design flexible, reusable molds that, once 3D printed, allow us to physically fabricate, by means of liquid casting, multiple copies of complex shapes with rich surface details and complex topology. The approach to design such flexible molds is based on a greedy bottom-up search of possible cuts over an object, evaluating for each possible cut the feasibility of the resulting mold. We use a dynamic simulation approach to evaluate candidate molds, providing a heuristic to generate forces that are able to open, detach, and remove a complex mold from the object it surrounds. We have tested the approach with a number of objects with nontrivial shapes and topologies."}]},{"page":"3806 - 3816","date_created":"2018-12-11T11:51:21Z","date_published":"2016-05-07T00:00:00Z","doi":"10.1145/2858036.2858354","publication_status":"published","year":"2016","language":[{"iso":"eng"}],"day":"07","publisher":"ACM","scopus_import":1,"quality_controlled":"1","month":"05","abstract":[{"lang":"eng","text":"We present a novel optimization-based algorithm for the design and fabrication of customized, deformable input devices, capable of continuously sensing their deformation. We propose to embed piezoresistive sensing elements into flexible 3D printed objects. These sensing elements are then utilized to recover rich and natural user interactions at runtime. Designing such objects is a challenging and hard problem if attempted manually for all but the simplest geometries and deformations. Our method simultaneously optimizes the internal routing of the sensing elements and computes a mapping from low-level sensor readings to user-specified outputs in order to minimize reconstruction error. We demonstrate the power and flexibility of the approach by designing and fabricating a set of flexible input devices. Our results indicate that the optimization-based design greatly outperforms manual routings in terms of reconstruction accuracy and thus interaction fidelity."}],"acknowledgement":"We thank Damian Karrer, Rocco Ghielmini and Jemin\r\nHwangbo for their help in our initial explorations. We would\r\nlike to thank Christian Schumacher for creating the video and\r\nC\r\n ́\r\necile Edwards-Rietmann for providing the voiceover. Mau-\r\nrizio Nitti helped us in designing our 3D characters. We thank\r\nChiara Daraio for insightful discussions on material proper-\r\nties and 3D printing. We also thank the CHI reviewers for\r\ntheir feedback and guidance. Fabrizio Pece was supported by\r\nan ETH/Marie Curie fellowship (FEL-3314-1).","oa_version":"None","publist_id":"5951","author":[{"last_name":"Bächer","full_name":"Bächer, Moritz","first_name":"Moritz"},{"last_name":"Hepp","full_name":"Hepp, Benjamin","first_name":"Benjamin"},{"last_name":"Pece","full_name":"Pece, Fabrizio","first_name":"Fabrizio"},{"first_name":"Paul","last_name":"Kry","full_name":"Kry, Paul"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385"},{"full_name":"Thomaszewski, Bernhard","last_name":"Thomaszewski","first_name":"Bernhard"},{"first_name":"Otmar","full_name":"Hilliges, Otmar","last_name":"Hilliges"}],"department":[{"_id":"BeBi"}],"title":"DefSense: computational design of customized deformable input devices","date_updated":"2021-01-12T06:49:51Z","citation":{"ista":"Bächer M, Hepp B, Pece F, Kry P, Bickel B, Thomaszewski B, Hilliges O. 2016. DefSense: computational design of customized deformable input devices. CHI: Conference on Human Factors in Computing Systems, 3806–3816.","chicago":"Bächer, Moritz, Benjamin Hepp, Fabrizio Pece, Paul Kry, Bernd Bickel, Bernhard Thomaszewski, and Otmar Hilliges. “DefSense: Computational Design of Customized Deformable Input Devices,” 3806–16. ACM, 2016. https://doi.org/10.1145/2858036.2858354.","apa":"Bächer, M., Hepp, B., Pece, F., Kry, P., Bickel, B., Thomaszewski, B., & Hilliges, O. (2016). DefSense: computational design of customized deformable input devices (pp. 3806–3816). Presented at the CHI: Conference on Human Factors in Computing Systems, San Jose, California, USA: ACM. https://doi.org/10.1145/2858036.2858354","ama":"Bächer M, Hepp B, Pece F, et al. DefSense: computational design of customized deformable input devices. In: ACM; 2016:3806-3816. doi:10.1145/2858036.2858354","ieee":"M. Bächer et al., “DefSense: computational design of customized deformable input devices,” presented at the CHI: Conference on Human Factors in Computing Systems, San Jose, California, USA, 2016, pp. 3806–3816.","short":"M. Bächer, B. Hepp, F. Pece, P. Kry, B. Bickel, B. Thomaszewski, O. Hilliges, in:, ACM, 2016, pp. 3806–3816.","mla":"Bächer, Moritz, et al. DefSense: Computational Design of Customized Deformable Input Devices. ACM, 2016, pp. 3806–16, doi:10.1145/2858036.2858354."},"user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","conference":{"location":"San Jose, California, USA","end_date":"2016-05-12","start_date":"2016-05-07","name":"CHI: Conference on Human Factors in Computing Systems"},"type":"conference","status":"public","_id":"1319"},{"oa":1,"publisher":"ACM","quality_controlled":"1","acknowledgement":"This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 645599.","date_created":"2018-12-11T11:51:36Z","date_published":"2016-07-01T00:00:00Z","doi":"10.1145/2897824.2925978","year":"2016","has_accepted_license":"1","day":"01","project":[{"call_identifier":"H2020","_id":"25082902-B435-11E9-9278-68D0E5697425","name":"Soft-bodied intelligence for Manipulation","grant_number":"645599"}],"article_number":"86","publist_id":"5878","author":[{"first_name":"Eder","id":"3FB91342-F248-11E8-B48F-1D18A9856A87","last_name":"Miguel Villalba","full_name":"Miguel Villalba, Eder"},{"last_name":"Lepoutre","full_name":"Lepoutre, Mathias","first_name":"Mathias"},{"orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"}],"title":"Computational design of stable planar-rod structures","citation":{"ista":"Miguel Villalba E, Lepoutre M, Bickel B. 2016. Computational design of stable planar-rod structures. ACM SIGGRAPH, ACM Transactions on Graphics, vol. 35, 86.","chicago":"Miguel Villalba, Eder, Mathias Lepoutre, and Bernd Bickel. “Computational Design of Stable Planar-Rod Structures,” Vol. 35. ACM, 2016. https://doi.org/10.1145/2897824.2925978.","apa":"Miguel Villalba, E., Lepoutre, M., & Bickel, B. (2016). Computational design of stable planar-rod structures (Vol. 35). Presented at the ACM SIGGRAPH, Anaheim, CA, USA: ACM. https://doi.org/10.1145/2897824.2925978","ama":"Miguel Villalba E, Lepoutre M, Bickel B. Computational design of stable planar-rod structures. In: Vol 35. ACM; 2016. doi:10.1145/2897824.2925978","short":"E. Miguel Villalba, M. Lepoutre, B. Bickel, in:, ACM, 2016.","ieee":"E. Miguel Villalba, M. Lepoutre, and B. Bickel, “Computational design of stable planar-rod structures,” presented at the ACM SIGGRAPH, Anaheim, CA, USA, 2016, vol. 35, no. 4.","mla":"Miguel Villalba, Eder, et al. Computational Design of Stable Planar-Rod Structures. Vol. 35, no. 4, 86, ACM, 2016, doi:10.1145/2897824.2925978."},"user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","alternative_title":["ACM Transactions on Graphics"],"scopus_import":1,"intvolume":" 35","month":"07","abstract":[{"lang":"eng","text":"We present a computational method for designing wire sculptures consisting of interlocking wires. Our method allows the computation of aesthetically pleasing structures that are structurally stable, efficiently fabricatable with a 2D wire bending machine, and assemblable without the need of additional connectors. Starting from a set of planar contours provided by the user, our method automatically tests for the feasibility of a design, determines a discrete ordering of wires at intersection points, and optimizes for the rest shape of the individual wires to maximize structural stability under frictional contact. In addition to their application to art, wire sculptures present an extremely efficient and fast alternative for low-fidelity rapid prototyping because manufacturing time and required material linearly scales with the physical size of objects. We demonstrate the effectiveness of our approach on a varied set of examples, all of which we fabricated."}],"oa_version":"Preprint","ec_funded":1,"issue":"4","volume":35,"publication_status":"published","language":[{"iso":"eng"}],"file":[{"relation":"main_file","access_level":"open_access","content_type":"application/pdf","checksum":"d00c2664a43d945df8876ea0193734e3","file_id":"4853","creator":"system","file_size":44766392,"date_updated":"2020-07-14T12:44:47Z","file_name":"IST-2017-763-v1+1_wirebending.pdf","date_created":"2018-12-12T10:11:01Z"}],"conference":{"location":"Anaheim, CA, USA","end_date":"2016-07-28","start_date":"2016-07-24","name":"ACM SIGGRAPH"},"type":"conference","pubrep_id":"763","status":"public","_id":"1364","file_date_updated":"2020-07-14T12:44:47Z","department":[{"_id":"BeBi"}],"date_updated":"2021-01-12T06:50:10Z","ddc":["006"]},{"quality_controlled":"1","publisher":"ACM","scopus_import":1,"month":"08","abstract":[{"text":"Creating mechanical automata that can walk in stable and pleasing manners is a challenging task that requires both skill and expertise. We propose to use computational design to offset the technical difficulties of this process. A simple drag-and-drop interface allows casual users to create personalized walking toys from a library of pre-defined template mechanisms. Provided with this input, our method leverages physical simulation and evolutionary optimization to refine the mechanical designs such that the resulting toys are able to walk. The optimization process is guided by an intuitive set of objectives that measure the quality of the walking motions. We demonstrate our approach on a set of simulated mechanical toys with different numbers of legs and various distinct gaits. Two fabricated prototypes showcase the feasibility of our designs.","lang":"eng"}],"oa_version":"None","page":"93 - 100","date_published":"2015-08-01T00:00:00Z","doi":"10.1145/2786784.2786803","date_created":"2018-12-11T11:52:30Z","publication_identifier":{"isbn":["978-1-4503-3496-9"]},"year":"2015","publication_status":"published","day":"01","language":[{"iso":"eng"}],"type":"conference","conference":{"name":"SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation","end_date":"2015-08-09","location":"Los Angeles, CA, United States","start_date":"2015-08-07"},"status":"public","_id":"1520","author":[{"first_name":"Gaurav","last_name":"Bharaj","full_name":"Bharaj, Gaurav"},{"full_name":"Coros, Stelian","last_name":"Coros","first_name":"Stelian"},{"first_name":"Bernhard","full_name":"Thomaszewski, Bernhard","last_name":"Thomaszewski"},{"first_name":"James","last_name":"Tompkin","full_name":"Tompkin, James"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel"},{"first_name":"Hanspeter","full_name":"Pfister, Hanspeter","last_name":"Pfister"}],"publist_id":"5655","title":"Computational design of walking automata","department":[{"_id":"BeBi"}],"date_updated":"2021-01-12T06:51:21Z","citation":{"mla":"Bharaj, Gaurav, et al. Computational Design of Walking Automata. ACM, 2015, pp. 93–100, doi:10.1145/2786784.2786803.","apa":"Bharaj, G., Coros, S., Thomaszewski, B., Tompkin, J., Bickel, B., & Pfister, H. (2015). Computational design of walking automata (pp. 93–100). Presented at the SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation, Los Angeles, CA, United States: ACM. https://doi.org/10.1145/2786784.2786803","ama":"Bharaj G, Coros S, Thomaszewski B, Tompkin J, Bickel B, Pfister H. Computational design of walking automata. In: ACM; 2015:93-100. doi:10.1145/2786784.2786803","ieee":"G. Bharaj, S. Coros, B. Thomaszewski, J. Tompkin, B. Bickel, and H. Pfister, “Computational design of walking automata,” presented at the SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation, Los Angeles, CA, United States, 2015, pp. 93–100.","short":"G. Bharaj, S. Coros, B. Thomaszewski, J. Tompkin, B. Bickel, H. Pfister, in:, ACM, 2015, pp. 93–100.","chicago":"Bharaj, Gaurav, Stelian Coros, Bernhard Thomaszewski, James Tompkin, Bernd Bickel, and Hanspeter Pfister. “Computational Design of Walking Automata,” 93–100. ACM, 2015. https://doi.org/10.1145/2786784.2786803.","ista":"Bharaj G, Coros S, Thomaszewski B, Tompkin J, Bickel B, Pfister H. 2015. Computational design of walking automata. SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation, 93–100."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87"},{"date_published":"2015-07-27T00:00:00Z","doi":"10.1145/2766924","volume":34,"issue":"4","date_created":"2018-12-11T11:53:06Z","publication_status":"published","year":"2015","day":"27","language":[{"iso":"eng"}],"quality_controlled":"1","scopus_import":1,"publisher":"ACM","month":"07","intvolume":" 34","abstract":[{"text":"In recent years we have seen numerous improvements on 3D scanning and tracking of human faces, greatly advancing the creation of digital doubles for film and video games. However, despite the high-resolution quality of the reconstruction approaches available, current methods are unable to capture one of the most important regions of the face - the eye region. In this work we present the first method for detailed spatio-temporal reconstruction of eyelids. Tracking and reconstructing eyelids is extremely challenging, as this region exhibits very complex and unique skin deformation where skin is folded under while opening the eye. Furthermore, eyelids are often only partially visible and obstructed due to selfocclusion and eyelashes. Our approach is to combine a geometric deformation model with image data, leveraging multi-view stereo, optical flow, contour tracking and wrinkle detection from local skin appearance. Our deformation model serves as a prior that enables reconstruction of eyelids even under strong self-occlusions caused by rolling and folding skin as the eye opens and closes. The output is a person-specific, time-varying eyelid reconstruction with anatomically plausible deformations. Our high-resolution detailed eyelids couple naturally with current facial performance capture approaches. As a result, our method can largely increase the fidelity of facial capture and the creation of digital doubles.","lang":"eng"}],"oa_version":"None","author":[{"last_name":"Bermano","full_name":"Bermano, Amit","first_name":"Amit"},{"first_name":"Thabo","full_name":"Beeler, Thabo","last_name":"Beeler"},{"first_name":"Yeara","last_name":"Kozlov","full_name":"Kozlov, Yeara"},{"full_name":"Bradley, Derek","last_name":"Bradley","first_name":"Derek"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385"},{"first_name":"Markus","full_name":"Gross, Markus","last_name":"Gross"}],"publist_id":"5535","title":"Detailed spatio-temporal reconstruction of eyelids","department":[{"_id":"BeBi"}],"citation":{"ista":"Bermano A, Beeler T, Kozlov Y, Bradley D, Bickel B, Gross M. 2015. Detailed spatio-temporal reconstruction of eyelids. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques vol. 34, 44.","chicago":"Bermano, Amit, Thabo Beeler, Yeara Kozlov, Derek Bradley, Bernd Bickel, and Markus Gross. “Detailed Spatio-Temporal Reconstruction of Eyelids,” Vol. 34. ACM, 2015. https://doi.org/10.1145/2766924.","ama":"Bermano A, Beeler T, Kozlov Y, Bradley D, Bickel B, Gross M. Detailed spatio-temporal reconstruction of eyelids. In: Vol 34. ACM; 2015. doi:10.1145/2766924","apa":"Bermano, A., Beeler, T., Kozlov, Y., Bradley, D., Bickel, B., & Gross, M. (2015). Detailed spatio-temporal reconstruction of eyelids (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States: ACM. https://doi.org/10.1145/2766924","short":"A. Bermano, T. Beeler, Y. Kozlov, D. Bradley, B. Bickel, M. Gross, in:, ACM, 2015.","ieee":"A. Bermano, T. Beeler, Y. Kozlov, D. Bradley, B. Bickel, and M. Gross, “Detailed spatio-temporal reconstruction of eyelids,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States, 2015, vol. 34, no. 4.","mla":"Bermano, Amit, et al. Detailed Spatio-Temporal Reconstruction of Eyelids. Vol. 34, no. 4, 44, ACM, 2015, doi:10.1145/2766924."},"date_updated":"2021-01-12T06:52:05Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","type":"conference","conference":{"name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques","start_date":"2015-08-09","end_date":"2015-08-13","location":"Los Angeles, CA, United States"},"status":"public","_id":"1625","article_number":"44"},{"status":"public","conference":{"name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques","location":"Los Angeles, CA, United States","end_date":"2015-08-13","start_date":"2015-08-09"},"type":"conference","article_number":"113","_id":"1626","title":"OmniAD: Data-driven omni-directional aerodynamics","department":[{"_id":"BeBi"}],"author":[{"first_name":"Tobias","full_name":"Martin, Tobias","last_name":"Martin"},{"full_name":"Umetani, Nobuyuki","last_name":"Umetani","first_name":"Nobuyuki"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel"}],"publist_id":"5532","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"mla":"Martin, Tobias, et al. OmniAD: Data-Driven Omni-Directional Aerodynamics. Vol. 34, no. 4, 113, ACM, 2015, doi:10.1145/2766919.","ama":"Martin T, Umetani N, Bickel B. OmniAD: Data-driven omni-directional aerodynamics. In: Vol 34. ACM; 2015. doi:10.1145/2766919","apa":"Martin, T., Umetani, N., & Bickel, B. (2015). OmniAD: Data-driven omni-directional aerodynamics (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States: ACM. https://doi.org/10.1145/2766919","short":"T. Martin, N. Umetani, B. Bickel, in:, ACM, 2015.","ieee":"T. Martin, N. Umetani, and B. Bickel, “OmniAD: Data-driven omni-directional aerodynamics,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States, 2015, vol. 34, no. 4.","chicago":"Martin, Tobias, Nobuyuki Umetani, and Bernd Bickel. “OmniAD: Data-Driven Omni-Directional Aerodynamics,” Vol. 34. ACM, 2015. https://doi.org/10.1145/2766919.","ista":"Martin T, Umetani N, Bickel B. 2015. OmniAD: Data-driven omni-directional aerodynamics. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, ACM Transactions on Graphics, vol. 34, 113."},"date_updated":"2021-01-12T06:52:05Z","intvolume":" 34","month":"07","scopus_import":1,"quality_controlled":"1","publisher":"ACM","alternative_title":["ACM Transactions on Graphics"],"oa_version":"None","abstract":[{"lang":"eng","text":"This paper introduces "OmniAD," a novel data-driven pipeline to model and acquire the aerodynamics of three-dimensional rigid objects. Traditionally, aerodynamics are examined through elaborate wind tunnel experiments or expensive fluid dynamics computations, and are only measured for a small number of discrete wind directions. OmniAD allows the evaluation of aerodynamic forces, such as drag and lift, for any incoming wind direction using a novel representation based on spherical harmonics. Our datadriven technique acquires the aerodynamic properties of an object simply by capturing its falling motion using a single camera. Once model parameters are estimated, OmniAD enables realistic realtime simulation of rigid bodies, such as the tumbling and gliding of leaves, without simulating the surrounding air. In addition, we propose an intuitive user interface based on OmniAD to interactively design three-dimensional kites that actually fly. Various nontraditional kites were designed to demonstrate the physical validity of our model."}],"date_created":"2018-12-11T11:53:06Z","issue":"4","date_published":"2015-07-27T00:00:00Z","doi":"10.1145/2766919","volume":34,"language":[{"iso":"eng"}],"day":"27","year":"2015","publication_status":"published"},{"doi":"10.1145/2766926","date_published":"2015-08-01T00:00:00Z","date_created":"2018-12-11T11:53:07Z","day":"01","year":"2015","publisher":"ACM","quality_controlled":"1","oa":1,"title":"Microstructures to control elasticity in 3D printing","author":[{"first_name":"Christian","last_name":"Schumacher","full_name":"Schumacher, Christian"},{"last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Rys","full_name":"Rys, Jan","first_name":"Jan"},{"last_name":"Marschner","full_name":"Marschner, Steve","first_name":"Steve"},{"last_name":"Daraio","full_name":"Daraio, Chiara","first_name":"Chiara"},{"first_name":"Markus","full_name":"Gross, Markus","last_name":"Gross"}],"publist_id":"5529","article_processing_charge":"No","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"ista":"Schumacher C, Bickel B, Rys J, Marschner S, Daraio C, Gross M. 2015. Microstructures to control elasticity in 3D printing. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques vol. 34, 136.","chicago":"Schumacher, Christian, Bernd Bickel, Jan Rys, Steve Marschner, Chiara Daraio, and Markus Gross. “Microstructures to Control Elasticity in 3D Printing,” Vol. 34. ACM, 2015. https://doi.org/10.1145/2766926.","apa":"Schumacher, C., Bickel, B., Rys, J., Marschner, S., Daraio, C., & Gross, M. (2015). Microstructures to control elasticity in 3D printing (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, USA: ACM. https://doi.org/10.1145/2766926","ama":"Schumacher C, Bickel B, Rys J, Marschner S, Daraio C, Gross M. Microstructures to control elasticity in 3D printing. In: Vol 34. ACM; 2015. doi:10.1145/2766926","ieee":"C. Schumacher, B. Bickel, J. Rys, S. Marschner, C. Daraio, and M. Gross, “Microstructures to control elasticity in 3D printing,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, USA, 2015, vol. 34, no. 4.","short":"C. Schumacher, B. Bickel, J. Rys, S. Marschner, C. Daraio, M. Gross, in:, ACM, 2015.","mla":"Schumacher, Christian, et al. Microstructures to Control Elasticity in 3D Printing. Vol. 34, no. 4, 136, ACM, 2015, doi:10.1145/2766926."},"article_number":"136","issue":"4","volume":34,"language":[{"iso":"eng"}],"publication_status":"published","month":"08","intvolume":" 34","scopus_import":1,"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1145/2766926"}],"oa_version":"Published Version","abstract":[{"text":"We propose a method for fabricating deformable objects with spatially varying elasticity using 3D printing. Using a single, relatively stiff printer material, our method designs an assembly of smallscale microstructures that have the effect of a softer material at the object scale, with properties depending on the microstructure used in each part of the object. We build on work in the area of metamaterials, using numerical optimization to design tiled microstructures with desired properties, but with the key difference that our method designs families of related structures that can be interpolated to smoothly vary the material properties over a wide range. To create an object with spatially varying elastic properties, we tile the object's interior with microstructures drawn from these families, generating a different microstructure for each cell using an efficient algorithm to select compatible structures for neighboring cells. We show results computed for both 2D and 3D objects, validating several 2D and 3D printed structures using standard material tests as well as demonstrating various example applications.","lang":"eng"}],"department":[{"_id":"BeBi"}],"date_updated":"2021-01-12T06:52:06Z","status":"public","type":"conference","conference":{"name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques","start_date":"2015-08-09","location":"Los Angeles, CA, USA","end_date":"2015-08-13"},"_id":"1628"},{"abstract":[{"text":"We present a computational tool for fabrication-oriented design of flexible rod meshes. Given a deformable surface and a set of deformed poses as input, our method automatically computes a printable rod mesh that, once manufactured, closely matches the input poses under the same boundary conditions. The core of our method is formed by an optimization scheme that adjusts the cross-sectional profiles of the rods and their rest centerline in order to best approximate the target deformations. This approach allows us to locally control the bending and stretching resistance of the surface with a single material, yielding high design flexibility and low fabrication cost.","lang":"eng"}],"oa_version":"None","acknowledgement":"This work was supported in part by grants from the Spanish Ministry of Economy (TIN2012-35840), and the European Research Council (ERC Starting Grant no. 280135 Animetrics).","scopus_import":1,"publisher":"ACM","quality_controlled":"1","month":"07","intvolume":" 34","publication_status":"published","year":"2015","day":"27","language":[{"iso":"eng"}],"issue":"4","volume":34,"date_published":"2015-07-27T00:00:00Z","doi":"10.1145/2766998","date_created":"2018-12-11T11:53:07Z","_id":"1627","article_number":"138","type":"conference","conference":{"name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques","start_date":"2015-08-09","end_date":"2015-08-13","location":"Los Angeles, CA, United States"},"status":"public","date_updated":"2021-01-12T06:52:06Z","citation":{"ama":"Pérez J, Thomaszewski B, Coros S, et al. Design and fabrication of flexible rod meshes. In: Vol 34. ACM; 2015. doi:10.1145/2766998","apa":"Pérez, J., Thomaszewski, B., Coros, S., Bickel, B., Canabal, J., Sumner, R., & Otaduy, M. (2015). Design and fabrication of flexible rod meshes (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States: ACM. https://doi.org/10.1145/2766998","short":"J. Pérez, B. Thomaszewski, S. Coros, B. Bickel, J. Canabal, R. Sumner, M. Otaduy, in:, ACM, 2015.","ieee":"J. Pérez et al., “Design and fabrication of flexible rod meshes,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA, United States, 2015, vol. 34, no. 4.","mla":"Pérez, Jesús, et al. Design and Fabrication of Flexible Rod Meshes. Vol. 34, no. 4, 138, ACM, 2015, doi:10.1145/2766998.","ista":"Pérez J, Thomaszewski B, Coros S, Bickel B, Canabal J, Sumner R, Otaduy M. 2015. Design and fabrication of flexible rod meshes. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques vol. 34, 138.","chicago":"Pérez, Jesús, Bernhard Thomaszewski, Stelian Coros, Bernd Bickel, José Canabal, Robert Sumner, and Miguel Otaduy. “Design and Fabrication of Flexible Rod Meshes,” Vol. 34. ACM, 2015. https://doi.org/10.1145/2766998."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publist_id":"5530","author":[{"first_name":"Jesús","full_name":"Pérez, Jesús","last_name":"Pérez"},{"full_name":"Thomaszewski, Bernhard","last_name":"Thomaszewski","first_name":"Bernhard"},{"full_name":"Coros, Stelian","last_name":"Coros","first_name":"Stelian"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel"},{"last_name":"Canabal","full_name":"Canabal, José","first_name":"José"},{"first_name":"Robert","full_name":"Sumner, Robert","last_name":"Sumner"},{"full_name":"Otaduy, Miguel","last_name":"Otaduy","first_name":"Miguel"}],"department":[{"_id":"BeBi"}],"title":"Design and fabrication of flexible rod meshes"},{"publist_id":"5391","author":[{"first_name":"Oliver","full_name":"Klehm, Oliver","last_name":"Klehm"},{"last_name":"Rousselle","full_name":"Rousselle, Fabrice","first_name":"Fabrice"},{"first_name":"Marios","last_name":"Papas","full_name":"Papas, Marios"},{"full_name":"Bradley, Derek","last_name":"Bradley","first_name":"Derek"},{"last_name":"Hery","full_name":"Hery, Christophe","first_name":"Christophe"},{"full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"full_name":"Jarosz, Wojciech","last_name":"Jarosz","first_name":"Wojciech"},{"full_name":"Beeler, Thabo","last_name":"Beeler","first_name":"Thabo"}],"department":[{"_id":"BeBi"}],"title":"Recent advances in facial appearance capture","date_updated":"2021-01-12T06:52:52Z","citation":{"short":"O. Klehm, F. Rousselle, M. Papas, D. Bradley, C. Hery, B. Bickel, W. Jarosz, T. Beeler, Computer Graphics Forum 34 (2015) 709–733.","ieee":"O. Klehm et al., “Recent advances in facial appearance capture,” Computer Graphics Forum, vol. 34, no. 2. Wiley-Blackwell, pp. 709–733, 2015.","ama":"Klehm O, Rousselle F, Papas M, et al. Recent advances in facial appearance capture. Computer Graphics Forum. 2015;34(2):709-733. doi:10.1111/cgf.12594","apa":"Klehm, O., Rousselle, F., Papas, M., Bradley, D., Hery, C., Bickel, B., … Beeler, T. (2015). Recent advances in facial appearance capture. Computer Graphics Forum. Wiley-Blackwell. https://doi.org/10.1111/cgf.12594","mla":"Klehm, Oliver, et al. “Recent Advances in Facial Appearance Capture.” Computer Graphics Forum, vol. 34, no. 2, Wiley-Blackwell, 2015, pp. 709–33, doi:10.1111/cgf.12594.","ista":"Klehm O, Rousselle F, Papas M, Bradley D, Hery C, Bickel B, Jarosz W, Beeler T. 2015. Recent advances in facial appearance capture. Computer Graphics Forum. 34(2), 709–733.","chicago":"Klehm, Oliver, Fabrice Rousselle, Marios Papas, Derek Bradley, Christophe Hery, Bernd Bickel, Wojciech Jarosz, and Thabo Beeler. “Recent Advances in Facial Appearance Capture.” Computer Graphics Forum. Wiley-Blackwell, 2015. https://doi.org/10.1111/cgf.12594."},"user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","type":"journal_article","status":"public","_id":"1734","page":"709 - 733","doi":"10.1111/cgf.12594","volume":34,"issue":"2","date_published":"2015-05-01T00:00:00Z","date_created":"2018-12-11T11:53:43Z","year":"2015","publication_status":"published","day":"01","publication":"Computer Graphics Forum","language":[{"iso":"eng"}],"quality_controlled":"1","scopus_import":1,"publisher":"Wiley-Blackwell","main_file_link":[{"url":"https://graphics.ethz.ch/~mpapas/publications/fac_star.pdf"}],"month":"05","intvolume":" 34","abstract":[{"text":"Facial appearance capture is now firmly established within academic research and used extensively across various application domains, perhaps most prominently in the entertainment industry through the design of virtual characters in video games and films. While significant progress has occurred over the last two decades, no single survey currently exists that discusses the similarities, differences, and practical considerations of the available appearance capture techniques as applied to human faces. A central difficulty of facial appearance capture is the way light interacts with skin-which has a complex multi-layered structure-and the interactions that occur below the skin surface can, by definition, only be observed indirectly. In this report, we distinguish between two broad strategies for dealing with this complexity. "Image-based methods" try to exhaustively capture the exact face appearance under different lighting and viewing conditions, and then render the face through weighted image combinations. "Parametric methods" instead fit the captured reflectance data to some parametric appearance model used during rendering, allowing for a more lightweight and flexible representation but at the cost of potentially increased rendering complexity or inexact reproduction. The goal of this report is to provide an overview that can guide practitioners and researchers in assessing the tradeoffs between current approaches and identifying directions for future advances in facial appearance capture.","lang":"eng"}],"oa_version":"None"},{"publist_id":"4957","author":[{"full_name":"Skouras, Mélina","last_name":"Skouras","first_name":"Mélina"},{"first_name":"Bernhard","last_name":"Thomaszewski","full_name":"Thomaszewski, Bernhard"},{"first_name":"Peter","full_name":"Kaufmann, Peter","last_name":"Kaufmann"},{"first_name":"Akash","full_name":"Garg, Akash","last_name":"Garg"},{"orcid":"0000-0001-6511-9385","full_name":"Bickel, Bernd","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"first_name":"Eitan","last_name":"Grinspun","full_name":"Grinspun, Eitan"},{"first_name":"Markus","full_name":"Gross, Markus","last_name":"Gross"}],"title":"Designing inflatable structures","citation":{"mla":"Skouras, Mélina, et al. Designing Inflatable Structures. Vol. 33, no. 4, 63, ACM, 2014, doi:10.1145/2601097.2601166.","ama":"Skouras M, Thomaszewski B, Kaufmann P, et al. Designing inflatable structures. In: Vol 33. ACM; 2014. doi:10.1145/2601097.2601166","apa":"Skouras, M., Thomaszewski, B., Kaufmann, P., Garg, A., Bickel, B., Grinspun, E., & Gross, M. (2014). Designing inflatable structures (Vol. 33). Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, ACM. https://doi.org/10.1145/2601097.2601166","short":"M. Skouras, B. Thomaszewski, P. Kaufmann, A. Garg, B. Bickel, E. Grinspun, M. Gross, in:, ACM, 2014.","ieee":"M. Skouras et al., “Designing inflatable structures,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, 2014, vol. 33, no. 4.","chicago":"Skouras, Mélina, Bernhard Thomaszewski, Peter Kaufmann, Akash Garg, Bernd Bickel, Eitan Grinspun, and Markus Gross. “Designing Inflatable Structures,” Vol. 33. ACM, 2014. https://doi.org/10.1145/2601097.2601166.","ista":"Skouras M, Thomaszewski B, Kaufmann P, Garg A, Bickel B, Grinspun E, Gross M. 2014. Designing inflatable structures. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques vol. 33, 63."},"date_updated":"2021-01-12T06:55:11Z","extern":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","type":"conference","conference":{"name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques"},"status":"public","_id":"2081","article_number":"63","date_published":"2014-07-01T00:00:00Z","volume":33,"issue":"4","doi":"10.1145/2601097.2601166","date_created":"2018-12-11T11:55:36Z","year":"2014","publication_status":"published","day":"01","language":[{"iso":"eng"}],"publisher":"ACM","month":"07","intvolume":" 33","abstract":[{"lang":"eng","text":"We propose an interactive, optimization-in-the-loop tool for designing inflatable structures. Given a target shape, the user draws a network of seams defining desired segment boundaries in 3D. Our method computes optimally-shaped flat panels for the segments, such that the inflated structure is as close as possible to the target while satisfying the desired seam positions. Our approach is underpinned by physics-based pattern optimization, accurate coarse-scale simulation using tension field theory, and a specialized constraint-optimization method. Our system is fast enough to warrant interactive exploration of different seam layouts, including internal connections, and their effects on the inflated shape. We demonstrate the resulting design process on a varied set of simulation examples, some of which we have fabricated, demonstrating excellent agreement with the design intent."}],"oa_version":"None","acknowledgement":"This work was partly funded by the NCCR Co-Me of the Swiss NSF."},{"status":"public","type":"conference","conference":{"name":"SIGGRAPH: 41st International Conference and Exhibition on Computer Graphics and Interactive Techniques"},"_id":"2080","title":"Spin-It: Optimizing moment of inertia for spinnable objects","author":[{"first_name":"Moritz","full_name":"Bac̈her, Moritz","last_name":"Bac̈Her"},{"last_name":"Whiting","full_name":"Whiting, Emily","first_name":"Emily"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel"},{"full_name":"Sorkine-Hornung, Olga","last_name":"Sorkine Hornung","first_name":"Olga"}],"publist_id":"4958","extern":1,"date_updated":"2019-04-26T07:22:07Z","citation":{"mla":"Bac̈Her, Moritz, et al. Spin-It: Optimizing Moment of Inertia for Spinnable Objects. Vol. 33, no. 4, ACM, 2014, doi:10.1145/2601097.2601157.","ama":"Bac̈Her M, Whiting E, Bickel B, Sorkine Hornung O. Spin-It: Optimizing moment of inertia for spinnable objects. In: Vol 33. ACM; 2014. doi:10.1145/2601097.2601157","apa":"Bac̈Her, M., Whiting, E., Bickel, B., & Sorkine Hornung, O. (2014). Spin-It: Optimizing moment of inertia for spinnable objects (Vol. 33). Presented at the SIGGRAPH: 41st International Conference and Exhibition on Computer Graphics and Interactive Techniques, ACM. https://doi.org/10.1145/2601097.2601157","short":"M. Bac̈Her, E. Whiting, B. Bickel, O. Sorkine Hornung, in:, ACM, 2014.","ieee":"M. Bac̈Her, E. Whiting, B. Bickel, and O. Sorkine Hornung, “Spin-It: Optimizing moment of inertia for spinnable objects,” presented at the SIGGRAPH: 41st International Conference and Exhibition on Computer Graphics and Interactive Techniques, 2014, vol. 33, no. 4.","chicago":"Bac̈Her, Moritz, Emily Whiting, Bernd Bickel, and Olga Sorkine Hornung. “Spin-It: Optimizing Moment of Inertia for Spinnable Objects,” Vol. 33. ACM, 2014. https://doi.org/10.1145/2601097.2601157.","ista":"Bac̈Her M, Whiting E, Bickel B, Sorkine Hornung O. 2014. Spin-It: Optimizing moment of inertia for spinnable objects. SIGGRAPH: 41st International Conference and Exhibition on Computer Graphics and Interactive Techniques vol. 33."},"month":"01","intvolume":" 33","publisher":"ACM","quality_controlled":0,"acknowledgement":"This project was supported in part by the ERC Starting Grant iModel (StG-2012-306877). Emily Whiting is supported by the ETH Zurich / Marie Curie COFUND Postdoctoral Fellowship.","abstract":[{"lang":"eng","text":"Spinning tops and yo-yos have long fascinated cultures around the world with their unexpected, graceful motions that seemingly elude gravity. We present an algorithm to generate designs for spinning objects by optimizing rotational dynamics properties. As input, the user provides a solid 3D model and a desired axis of rotation. Our approach then modifies the mass distribution such that the principal directions of the moment of inertia align with the target rotation frame. We augment the model by creating voids inside its volume, with interior fill represented by an adaptive multi-resolution vox-elization. The discrete voxel fill values are optimized using a continuous, nonlinear formulation. Further, we optimize for rotational stability by maximizing the dominant principal moment. We extend our technique to incorporate deformation and multiple materials for cases where internal voids alone are insufficient. Our method is well-suited for a variety of 3D printed models, ranging from characters to abstract shapes. We demonstrate tops and yo-yos that spin surprisingly stably despite their asymmetric appearance. "}],"volume":33,"date_published":"2014-01-01T00:00:00Z","issue":"4","doi":"10.1145/2601097.2601157","date_created":"2018-12-11T11:55:35Z","day":"01","publication_status":"published","year":"2014"},{"date_created":"2018-12-11T11:55:48Z","issue":"2","doi":"10.1145/2546276","volume":33,"date_published":"2014-03-01T00:00:00Z","year":"2014","publication_status":"published","publication":"ACM Transactions on Graphics","day":"01","quality_controlled":0,"publisher":"ACM","intvolume":" 33","month":"03","abstract":[{"text":"The facial performance of an individual is inherently rich in subtle deformation and timing details. Although these subtleties make the performance realistic and compelling, they often elude both motion capture and hand animation. We present a technique for adding fine-scale details and expressiveness to low-resolution art-directed facial performances, such as those created manually using a rig, via marker-based capture, by fitting a morphable model to a video, or through Kinect reconstruction using recent faceshift technology. We employ a high-resolution facial performance capture system to acquire a representative performance of an individual in which he or she explores the full range of facial expressiveness. From the captured data, our system extracts an expressiveness model that encodes subtle spatial and temporal deformation details specific to that particular individual. Once this model has been built, these details can be transferred to low-resolution art-directed performances. We demonstrate results on various forms of input; after our enhancement, the resulting animations exhibit the same nuances and fine spatial details as the captured performance, with optional temporal enhancement to match the dynamics of the actor. Finally, we show that our technique outperforms the current state-of-the-art in example-based facial animation.","lang":"eng"}],"author":[{"first_name":"Amit","full_name":"Bermano, Amit H","last_name":"Bermano"},{"first_name":"Derek","last_name":"Bradley","full_name":"Bradley, Derek J"},{"first_name":"Thabo","full_name":"Beeler, Thabo","last_name":"Beeler"},{"full_name":"Zund, Fabio","last_name":"Zund","first_name":"Fabio"},{"last_name":"Nowrouzezahrai","full_name":"Nowrouzezahrai, Derek","first_name":"Derek"},{"first_name":"Ilya","last_name":"Baran","full_name":"Baran, Ilya"},{"first_name":"Olga","full_name":"Sorkine-Hornung, Olga","last_name":"Sorkine Hornung"},{"first_name":"Hanspeter","last_name":"Pfister","full_name":"Pfister, Hanspeter"},{"first_name":"Robert","full_name":"Sumner, Robert W","last_name":"Sumner"},{"full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"first_name":"Markus","full_name":"Groß, Markus S","last_name":"Groß"}],"publist_id":"4919","title":"Facial performance enhancement using dynamic shape space analysis","date_updated":"2021-01-12T06:55:24Z","citation":{"mla":"Bermano, Amit, et al. “Facial Performance Enhancement Using Dynamic Shape Space Analysis.” ACM Transactions on Graphics, vol. 33, no. 2, ACM, 2014, doi:10.1145/2546276.","short":"A. Bermano, D. Bradley, T. Beeler, F. Zund, D. Nowrouzezahrai, I. Baran, O. Sorkine Hornung, H. Pfister, R. Sumner, B. Bickel, M. Groß, ACM Transactions on Graphics 33 (2014).","ieee":"A. Bermano et al., “Facial performance enhancement using dynamic shape space analysis,” ACM Transactions on Graphics, vol. 33, no. 2. ACM, 2014.","ama":"Bermano A, Bradley D, Beeler T, et al. Facial performance enhancement using dynamic shape space analysis. ACM Transactions on Graphics. 2014;33(2). doi:10.1145/2546276","apa":"Bermano, A., Bradley, D., Beeler, T., Zund, F., Nowrouzezahrai, D., Baran, I., … Groß, M. (2014). Facial performance enhancement using dynamic shape space analysis. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2546276","chicago":"Bermano, Amit, Derek Bradley, Thabo Beeler, Fabio Zund, Derek Nowrouzezahrai, Ilya Baran, Olga Sorkine Hornung, et al. “Facial Performance Enhancement Using Dynamic Shape Space Analysis.” ACM Transactions on Graphics. ACM, 2014. https://doi.org/10.1145/2546276.","ista":"Bermano A, Bradley D, Beeler T, Zund F, Nowrouzezahrai D, Baran I, Sorkine Hornung O, Pfister H, Sumner R, Bickel B, Groß M. 2014. Facial performance enhancement using dynamic shape space analysis. ACM Transactions on Graphics. 33(2)."},"extern":1,"type":"journal_article","status":"public","_id":"2115"},{"abstract":[{"lang":"eng","text":"We present an interactive design system that allows non-expert users to create animated mechanical characters. Given an articulated character as input, the user iteratively creates an animation by sketching motion curves indicating how different parts of the character should move. For each motion curve, our framework creates an optimized mechanism that reproduces it as closely as possible. The resulting mechanisms are attached to the character and then connected to each other using gear trains, which are created in a semi-automated fashion. The mechanical assemblies generated with our system can be driven with a single input driver, such as a hand-operated crank or an electric motor, and they can be fabricated using rapid prototyping devices. We demonstrate the versatility of our approach by designing a wide range of mechanical characters, several of which we manufactured using 3D printing. While our pipeline is designed for characters driven by planar mechanisms, significant parts of it extend directly to non-planar mechanisms, allowing us to create characters with compelling 3D motions. "}],"quality_controlled":0,"publisher":"ACM","month":"07","intvolume":" 32","publication_status":"published","year":"2013","day":"01","publication":"ACM Transactions on Graphics","issue":"4","doi":"10.1145/2461912.2461953","volume":32,"date_published":"2013-07-01T00:00:00Z","date_created":"2018-12-11T11:55:46Z","_id":"2108","type":"journal_article","status":"public","date_updated":"2021-01-12T06:55:21Z","citation":{"mla":"Coros, Stelian, et al. “Computational Design of Mechanical Characters.” ACM Transactions on Graphics, vol. 32, no. 4, ACM, 2013, doi:10.1145/2461912.2461953.","ama":"Coros S, Thomaszewski B, Noris G, et al. Computational design of mechanical characters. ACM Transactions on Graphics. 2013;32(4). doi:10.1145/2461912.2461953","apa":"Coros, S., Thomaszewski, B., Noris, G., Sueda, S., Forberg, M., Sumner, R., … Bickel, B. (2013). Computational design of mechanical characters. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2461912.2461953","ieee":"S. Coros et al., “Computational design of mechanical characters,” ACM Transactions on Graphics, vol. 32, no. 4. ACM, 2013.","short":"S. Coros, B. Thomaszewski, G. Noris, S. Sueda, M. Forberg, R. Sumner, W. Matusik, B. Bickel, ACM Transactions on Graphics 32 (2013).","chicago":"Coros, Stelian, Bernhard Thomaszewski, Gioacchino Noris, Shinjiro Sueda, Moira Forberg, Robert Sumner, Wojciech Matusik, and Bernd Bickel. “Computational Design of Mechanical Characters.” ACM Transactions on Graphics. ACM, 2013. https://doi.org/10.1145/2461912.2461953.","ista":"Coros S, Thomaszewski B, Noris G, Sueda S, Forberg M, Sumner R, Matusik W, Bickel B. 2013. Computational design of mechanical characters. ACM Transactions on Graphics. 32(4)."},"extern":1,"author":[{"full_name":"Coros, Stelian","last_name":"Coros","first_name":"Stelian"},{"last_name":"Thomaszewski","full_name":"Thomaszewski, Bernhard","first_name":"Bernhard"},{"first_name":"Gioacchino","full_name":"Noris, Gioacchino","last_name":"Noris"},{"first_name":"Shinjiro","last_name":"Sueda","full_name":"Sueda, Shinjiro"},{"last_name":"Forberg","full_name":"Forberg, Moira","first_name":"Moira"},{"full_name":"Sumner, Robert W","last_name":"Sumner","first_name":"Robert"},{"last_name":"Matusik","full_name":"Matusik, Wojciech","first_name":"Wojciech"},{"last_name":"Bickel","full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"}],"publist_id":"4927","title":"Computational design of mechanical characters"},{"month":"07","intvolume":" 32","publisher":"ACM","quality_controlled":0,"abstract":[{"lang":"eng","text":"We present a method for practical physical reproduction and design of homogeneous materials with desired subsurface scattering. Our process uses a collection of different pigments that can be suspended in a clear base material. Our goal is to determine pigment concentrations that best reproduce the appearance and subsurface scattering of a given target material. In order to achieve this task we first fabricate a collection of material samples composed of known mixtures of the available pigments with the base material. We then acquire their reflectance profiles using a custom-built measurement device. We use the same device to measure the reflectance profile of a target material. Based on the database of mappings from pigment concentrations to reflectance profiles, we use an optimization process to compute the concentration of pigments to best replicate the target material appearance. We demonstrate the practicality of our method by reproducing a variety of different translucent materials. We also present a tool that allows the user to explore the range of achievable appearances for a given set of pigments. "}],"date_published":"2013-07-01T00:00:00Z","issue":"4","volume":32,"doi":"10.1145/2461912.2461974","date_created":"2018-12-11T11:55:46Z","day":"01","publication":"ACM Transactions on Graphics","year":"2013","publication_status":"published","status":"public","type":"journal_article","_id":"2110","title":"Fabricating translucent materials using continuous pigment mixtures","author":[{"last_name":"Papas","full_name":"Papas, Marios","first_name":"Marios"},{"last_name":"Regg","full_name":"Regg, Christian","first_name":"Christian"},{"last_name":"Jarosz","full_name":"Jarosz, Wojciech","first_name":"Wojciech"},{"full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"last_name":"Jackson","full_name":"Jackson, Philip V","first_name":"Philip"},{"full_name":"Matusik, Wojciech","last_name":"Matusik","first_name":"Wojciech"},{"last_name":"Marschner","full_name":"Marschner, Steve","first_name":"Steve"},{"full_name":"Groß, Markus S","last_name":"Groß","first_name":"Markus"}],"publist_id":"4925","extern":1,"date_updated":"2021-01-12T06:55:22Z","citation":{"short":"M. Papas, C. Regg, W. Jarosz, B. Bickel, P. Jackson, W. Matusik, S. Marschner, M. Groß, ACM Transactions on Graphics 32 (2013).","ieee":"M. Papas et al., “Fabricating translucent materials using continuous pigment mixtures,” ACM Transactions on Graphics, vol. 32, no. 4. ACM, 2013.","apa":"Papas, M., Regg, C., Jarosz, W., Bickel, B., Jackson, P., Matusik, W., … Groß, M. (2013). Fabricating translucent materials using continuous pigment mixtures. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2461912.2461974","ama":"Papas M, Regg C, Jarosz W, et al. Fabricating translucent materials using continuous pigment mixtures. ACM Transactions on Graphics. 2013;32(4). doi:10.1145/2461912.2461974","mla":"Papas, Marios, et al. “Fabricating Translucent Materials Using Continuous Pigment Mixtures.” ACM Transactions on Graphics, vol. 32, no. 4, ACM, 2013, doi:10.1145/2461912.2461974.","ista":"Papas M, Regg C, Jarosz W, Bickel B, Jackson P, Matusik W, Marschner S, Groß M. 2013. Fabricating translucent materials using continuous pigment mixtures. ACM Transactions on Graphics. 32(4).","chicago":"Papas, Marios, Christian Regg, Wojciech Jarosz, Bernd Bickel, Philip Jackson, Wojciech Matusik, Steve Marschner, and Markus Groß. “Fabricating Translucent Materials Using Continuous Pigment Mixtures.” ACM Transactions on Graphics. ACM, 2013. https://doi.org/10.1145/2461912.2461974."}},{"abstract":[{"text":"Animated animatronic figures are a unique way to give physical presence to a character. However, their movement and expressions are often limited due to mechanical constraints. In this paper, we propose a complete process for augmenting physical avatars using projector-based illumination, significantly increasing their expressiveness. Given an input animation, the system decomposes the motion into low-frequency motion that can be physically reproduced by the animatronic head and high-frequency details that are added using projected shading. At the core is a spatio-temporal optimization process that compresses the motion in gradient space, ensuring faithful motion replay while respecting the physical limitations of the system. We also propose a complete multi-camera and projection system, including a novel defocused projection and subsurface scattering compensation scheme. The result of our system is a highly expressive physical avatar that features facial details and motion otherwise unattainable due to physical constraints.","lang":"eng"}],"publisher":"ACM","quality_controlled":0,"month":"11","intvolume":" 32","publication_status":"published","year":"2013","day":"01","publication":"ACM Transactions on Graphics","date_published":"2013-11-01T00:00:00Z","volume":32,"doi":"10.1145/2508363.2508416","issue":"6","date_created":"2018-12-11T11:55:47Z","_id":"2111","type":"journal_article","status":"public","citation":{"ista":"Bermano A, Bruschweiler P, Grundhöfer A, Iwai D, Bickel B, Groß M. 2013. Augmenting physical avatars using projector-based illumination. ACM Transactions on Graphics. 32(6).","chicago":"Bermano, Amit, Philipp Bruschweiler, Anselm Grundhöfer, Daisuke Iwai, Bernd Bickel, and Markus Groß. “Augmenting Physical Avatars Using Projector-Based Illumination.” ACM Transactions on Graphics. ACM, 2013. https://doi.org/10.1145/2508363.2508416.","ama":"Bermano A, Bruschweiler P, Grundhöfer A, Iwai D, Bickel B, Groß M. Augmenting physical avatars using projector-based illumination. ACM Transactions on Graphics. 2013;32(6). doi:10.1145/2508363.2508416","apa":"Bermano, A., Bruschweiler, P., Grundhöfer, A., Iwai, D., Bickel, B., & Groß, M. (2013). Augmenting physical avatars using projector-based illumination. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2508363.2508416","short":"A. Bermano, P. Bruschweiler, A. Grundhöfer, D. Iwai, B. Bickel, M. Groß, ACM Transactions on Graphics 32 (2013).","ieee":"A. Bermano, P. Bruschweiler, A. Grundhöfer, D. Iwai, B. Bickel, and M. Groß, “Augmenting physical avatars using projector-based illumination,” ACM Transactions on Graphics, vol. 32, no. 6. ACM, 2013.","mla":"Bermano, Amit, et al. “Augmenting Physical Avatars Using Projector-Based Illumination.” ACM Transactions on Graphics, vol. 32, no. 6, ACM, 2013, doi:10.1145/2508363.2508416."},"date_updated":"2021-01-12T06:55:23Z","extern":1,"publist_id":"4922","author":[{"first_name":"Amit","last_name":"Bermano","full_name":"Bermano, Amit H"},{"first_name":"Philipp","full_name":"Bruschweiler, Philipp","last_name":"Bruschweiler"},{"last_name":"Grundhöfer","full_name":"Grundhöfer, Anselm","first_name":"Anselm"},{"full_name":"Iwai, Daisuke","last_name":"Iwai","first_name":"Daisuke"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel"},{"last_name":"Groß","full_name":"Groß, Markus S","first_name":"Markus"}],"title":"Augmenting physical avatars using projector-based illumination"},{"date_updated":"2021-01-12T06:55:22Z","citation":{"apa":"Hildebrand, K., Bickel, B., & Alexa, M. (2013). Orthogonal slicing for additive manufacturing. Computers and Graphics (Pergamon). Elsevier. https://doi.org/10.1016/j.cag.2013.05.011","ama":"Hildebrand K, Bickel B, Alexa M. Orthogonal slicing for additive manufacturing. Computers and Graphics (Pergamon). 2013;37(6):669-675. doi:10.1016/j.cag.2013.05.011","ieee":"K. Hildebrand, B. Bickel, and M. Alexa, “Orthogonal slicing for additive manufacturing,” Computers and Graphics (Pergamon), vol. 37, no. 6. Elsevier, pp. 669–675, 2013.","short":"K. Hildebrand, B. Bickel, M. Alexa, Computers and Graphics (Pergamon) 37 (2013) 669–675.","mla":"Hildebrand, Kristian, et al. “Orthogonal Slicing for Additive Manufacturing.” Computers and Graphics (Pergamon), vol. 37, no. 6, Elsevier, 2013, pp. 669–75, doi:10.1016/j.cag.2013.05.011.","ista":"Hildebrand K, Bickel B, Alexa M. 2013. Orthogonal slicing for additive manufacturing. Computers and Graphics (Pergamon). 37(6), 669–675.","chicago":"Hildebrand, Kristian, Bernd Bickel, and Marc Alexa. “Orthogonal Slicing for Additive Manufacturing.” Computers and Graphics (Pergamon). Elsevier, 2013. https://doi.org/10.1016/j.cag.2013.05.011."},"extern":1,"author":[{"first_name":"Kristian","last_name":"Hildebrand","full_name":"Hildebrand, Kristian"},{"full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","last_name":"Bickel","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Alexa","full_name":"Alexa, Marc","first_name":"Marc"}],"publist_id":"4924","title":"Orthogonal slicing for additive manufacturing","_id":"2109","type":"journal_article","status":"public","year":"2013","publication_status":"published","day":"01","publication":"Computers and Graphics (Pergamon)","page":"669 - 675","volume":37,"issue":"6","date_published":"2013-10-01T00:00:00Z","doi":"10.1016/j.cag.2013.05.011","date_created":"2018-12-11T11:55:46Z","abstract":[{"text":"Most additive manufacturing technologies work by layering, i.e. slicing the shape and then generating each slice independently. This introduces an anisotropy into the process, often as different accuracies in the tangential and normal directions, but also in terms of other parameters such as build speed or tensile strength and strain. We model this as an anisotropic cubic element. Our approach then finds a compromise between modeling each part of the shape individually in the best possible direction and using one direction for the whole shape part. In particular, we compute an orthogonal basis and consider only the three basis vectors as slice normals (i.e. fabrication directions). Then we optimize a decomposition of the shape along this basis so that each part can be consistently sliced along one of the basis vectors. In simulation, we show that this approach is superior to slicing the whole shape in one direction, only. It also has clear benefits if the shape is larger than the build volume of the available equipment.","lang":"eng"}],"quality_controlled":0,"publisher":"Elsevier","month":"10","intvolume":" 37"},{"_id":"2107","type":"journal_article","status":"public","citation":{"chicago":"Skouras, Mélina, Bernhard Thomaszewski, Stelian Coros, Bernd Bickel, and Markus Groß. “Computational Design of Actuated Deformable Characters.” ACM Transactions on Graphics. ACM, 2013. https://doi.org/10.1145/2461912.2461979.","ista":"Skouras M, Thomaszewski B, Coros S, Bickel B, Groß M. 2013. Computational design of actuated deformable characters. ACM Transactions on Graphics. 32(4).","mla":"Skouras, Mélina, et al. “Computational Design of Actuated Deformable Characters.” ACM Transactions on Graphics, vol. 32, no. 4, ACM, 2013, doi:10.1145/2461912.2461979.","short":"M. Skouras, B. Thomaszewski, S. Coros, B. Bickel, M. Groß, ACM Transactions on Graphics 32 (2013).","ieee":"M. Skouras, B. Thomaszewski, S. Coros, B. Bickel, and M. Groß, “Computational design of actuated deformable characters,” ACM Transactions on Graphics, vol. 32, no. 4. ACM, 2013.","apa":"Skouras, M., Thomaszewski, B., Coros, S., Bickel, B., & Groß, M. (2013). Computational design of actuated deformable characters. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2461912.2461979","ama":"Skouras M, Thomaszewski B, Coros S, Bickel B, Groß M. Computational design of actuated deformable characters. ACM Transactions on Graphics. 2013;32(4). doi:10.1145/2461912.2461979"},"date_updated":"2021-01-12T06:55:21Z","extern":1,"author":[{"first_name":"Mélina","last_name":"Skouras","full_name":"Skouras, Mélina"},{"first_name":"Bernhard","full_name":"Thomaszewski, Bernhard","last_name":"Thomaszewski"},{"first_name":"Stelian","last_name":"Coros","full_name":"Coros, Stelian"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel"},{"first_name":"Markus","full_name":"Groß, Markus S","last_name":"Groß"}],"publist_id":"4926","title":"Computational design of actuated deformable characters","abstract":[{"text":"We present a method for fabrication-oriented design of actuated deformable characters that allows a user to automatically create physical replicas of digitally designed characters using rapid manufacturing technologies. Given a deformable character and a set of target poses as input, our method computes a small set of actuators along with their locations on the surface and optimizes the internal material distribution such that the resulting character exhibits the desired deformation behavior. We approach this problem with a dedicated algorithm that combines finite-element analysis, sparse regularization, and constrained optimization. We validate our pipeline on a set of two- and three-dimensional example characters and present results in simulation and physically-fabricated prototypes.","lang":"eng"}],"acknowledgement":"This work was partly funded by the NCCR Co-Me of the Swiss NSF","quality_controlled":0,"publisher":"ACM","intvolume":" 32","month":"07","year":"2013","publication_status":"published","publication":"ACM Transactions on Graphics","day":"01","date_created":"2018-12-11T11:55:45Z","date_published":"2013-07-01T00:00:00Z","volume":32,"doi":"10.1145/2461912.2461979","issue":"4"},{"abstract":[{"text":"Force-deformation measurements of cloth exhibit significant hysteresis, and many researchers have identified internal friction as the source of this effect. However, it has not been incorporated into computer animation models of cloth. In this paper, we propose a model of internal friction based on an augmented reparameterization of Dahl's model, and we show that this model provides a good match to several important features of cloth hysteresis even with a minimal set of parameters. We also propose novel parameter estimation procedures that are based on simple and inexpensive setups and need only sparse data, as opposed to the complex hardware and dense data acquisition of previous methods. Finally, we provide an algorithm for the efficient simulation of internal friction, and we demonstrate it on simulation examples that show disparate behavior with and without internal friction.","lang":"eng"}],"acknowledgement":"This work was supported in part by the European Research Council (ERC-2011-StG-280135 Animetrics) and the Spanish Ministry of Economy (TIN2012-35840).","quality_controlled":0,"publisher":"ACM","intvolume":" 32","month":"11","publication_status":"published","year":"2013","publication":"ACM Transactions on Graphics","day":"01","date_created":"2018-12-11T11:55:47Z","date_published":"2013-11-01T00:00:00Z","doi":"10.1145/2508363.2508389 ","issue":"6","volume":32,"_id":"2112","type":"journal_article","status":"public","citation":{"ama":"Miguel E, Tamstorf R, Bradley D, et al. Modeling and estimation of internal friction in cloth. ACM Transactions on Graphics. 2013;32(6). doi:10.1145/2508363.2508389 ","apa":"Miguel, E., Tamstorf, R., Bradley, D., Schvartzman, S., Thomaszewski, B., Bickel, B., … Otaduy, M. (2013). Modeling and estimation of internal friction in cloth. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2508363.2508389 ","ieee":"E. Miguel et al., “Modeling and estimation of internal friction in cloth,” ACM Transactions on Graphics, vol. 32, no. 6. ACM, 2013.","short":"E. Miguel, R. Tamstorf, D. Bradley, S. Schvartzman, B. Thomaszewski, B. Bickel, W. Matusik, S. Marschner, M. Otaduy, ACM Transactions on Graphics 32 (2013).","mla":"Miguel, Eder, et al. “Modeling and Estimation of Internal Friction in Cloth.” ACM Transactions on Graphics, vol. 32, no. 6, ACM, 2013, doi:10.1145/2508363.2508389 .","ista":"Miguel E, Tamstorf R, Bradley D, Schvartzman S, Thomaszewski B, Bickel B, Matusik W, Marschner S, Otaduy M. 2013. Modeling and estimation of internal friction in cloth. ACM Transactions on Graphics. 32(6).","chicago":"Miguel, Eder, Rasmus Tamstorf, Derek Bradley, Sara Schvartzman, Bernhard Thomaszewski, Bernd Bickel, Wojciech Matusik, Steve Marschner, and Miguel Otaduy. “Modeling and Estimation of Internal Friction in Cloth.” ACM Transactions on Graphics. ACM, 2013. https://doi.org/10.1145/2508363.2508389 ."},"date_updated":"2021-01-12T06:55:23Z","extern":1,"publist_id":"4923","author":[{"full_name":"Miguel, Eder","last_name":"Miguel","first_name":"Eder"},{"full_name":"Tamstorf, Rasmus","last_name":"Tamstorf","first_name":"Rasmus"},{"last_name":"Bradley","full_name":"Bradley, Derek J","first_name":"Derek"},{"last_name":"Schvartzman","full_name":"Schvartzman, Sara C","first_name":"Sara"},{"first_name":"Bernhard","full_name":"Thomaszewski, Bernhard","last_name":"Thomaszewski"},{"full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","last_name":"Bickel","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"},{"last_name":"Marschner","full_name":"Marschner, Steve","first_name":"Steve"},{"last_name":"Otaduy","full_name":"Otaduy, Miguel A","first_name":"Miguel"}],"title":"Modeling and estimation of internal friction in cloth"},{"abstract":[{"lang":"eng","text":"A new method fabricates custom surface reflectance and spatially varying bidirectional reflectance distribution functions (svBRDFs). Researchers optimize a microgeometry for a range of normal distribution functions and simulate the resulting surface's effective reflectance. Using the simulation's results, they reproduce an input svBRDF's appearance by distributing the microgeometry on the printed material's surface. This method lets people print svBRDFs on planar samples with current 3D printing technology, even with a limited set of printing materials. It extends naturally to printing svBRDFs on arbitrary shapes."}],"intvolume":" 33","month":"09","publisher":"IEEE","quality_controlled":0,"publication":"IEEE Computer Graphics and Applications","day":"23","year":"2013","publication_status":"published","date_created":"2018-12-11T11:55:47Z","volume":33,"date_published":"2013-09-23T00:00:00Z","issue":"6","doi":"10.1109/MCG.2013.82 ","page":"48 - 57","_id":"2113","status":"public","type":"journal_article","extern":1,"citation":{"chicago":"Rouiller, Olivier, Bernd Bickel, Jan Kautz, Wojciech Matusik, and Marc Alexa. “3D Printing Spatially Varying BRDFs.” IEEE Computer Graphics and Applications. IEEE, 2013. https://doi.org/10.1109/MCG.2013.82 .","ista":"Rouiller O, Bickel B, Kautz J, Matusik W, Alexa M. 2013. 3D printing spatially varying BRDFs. IEEE Computer Graphics and Applications. 33(6), 48–57.","mla":"Rouiller, Olivier, et al. “3D Printing Spatially Varying BRDFs.” IEEE Computer Graphics and Applications, vol. 33, no. 6, IEEE, 2013, pp. 48–57, doi:10.1109/MCG.2013.82 .","ama":"Rouiller O, Bickel B, Kautz J, Matusik W, Alexa M. 3D printing spatially varying BRDFs. IEEE Computer Graphics and Applications. 2013;33(6):48-57. doi:10.1109/MCG.2013.82 ","apa":"Rouiller, O., Bickel, B., Kautz, J., Matusik, W., & Alexa, M. (2013). 3D printing spatially varying BRDFs. IEEE Computer Graphics and Applications. IEEE. https://doi.org/10.1109/MCG.2013.82 ","ieee":"O. Rouiller, B. Bickel, J. Kautz, W. Matusik, and M. Alexa, “3D printing spatially varying BRDFs,” IEEE Computer Graphics and Applications, vol. 33, no. 6. IEEE, pp. 48–57, 2013.","short":"O. Rouiller, B. Bickel, J. Kautz, W. Matusik, M. Alexa, IEEE Computer Graphics and Applications 33 (2013) 48–57."},"date_updated":"2021-01-12T06:55:23Z","title":"3D printing spatially varying BRDFs","author":[{"last_name":"Rouiller","full_name":"Rouiller, Olivier","first_name":"Olivier"},{"orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"last_name":"Kautz","full_name":"Kautz, Jan","first_name":"Jan"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"},{"full_name":"Alexa, Marc","last_name":"Alexa","first_name":"Marc"}],"publist_id":"4920"},{"status":"public","type":"journal_article","_id":"2114","title":"Computational aspects of fabrication: Modeling, design and 3d printing","publist_id":"4921","author":[{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel"},{"last_name":"Alexa","full_name":"Alexa, Marc","first_name":"Marc"}],"extern":1,"date_updated":"2021-01-12T06:55:24Z","citation":{"chicago":"Bickel, Bernd, and Marc Alexa. “Computational Aspects of Fabrication: Modeling, Design and 3d Printing.” IEEE Computer Graphics and Applications. IEEE, 2013. https://doi.org/10.1109/MCG.2013.89.","ista":"Bickel B, Alexa M. 2013. Computational aspects of fabrication: Modeling, design and 3d printing. IEEE Computer Graphics and Applications. 33(6), 24–25.","mla":"Bickel, Bernd, and Marc Alexa. “Computational Aspects of Fabrication: Modeling, Design and 3d Printing.” IEEE Computer Graphics and Applications, vol. 33, no. 6, IEEE, 2013, pp. 24–25, doi:10.1109/MCG.2013.89.","ieee":"B. Bickel and M. Alexa, “Computational aspects of fabrication: Modeling, design and 3d printing,” IEEE Computer Graphics and Applications, vol. 33, no. 6. IEEE, pp. 24–25, 2013.","short":"B. Bickel, M. Alexa, IEEE Computer Graphics and Applications 33 (2013) 24–25.","apa":"Bickel, B., & Alexa, M. (2013). Computational aspects of fabrication: Modeling, design and 3d printing. IEEE Computer Graphics and Applications. IEEE. https://doi.org/10.1109/MCG.2013.89","ama":"Bickel B, Alexa M. Computational aspects of fabrication: Modeling, design and 3d printing. IEEE Computer Graphics and Applications. 2013;33(6):24-25. doi:10.1109/MCG.2013.89"},"intvolume":" 33","month":"12","publisher":"IEEE","quality_controlled":0,"abstract":[{"text":"3D printing is considered a disruptive technology with a potentially tremendous socioeconomic impact. The three articles in this special issue illustrate how novel computer graphics approaches are advancing such digital fabrication.","lang":"eng"}],"date_created":"2018-12-11T11:55:48Z","volume":33,"doi":"10.1109/MCG.2013.89","date_published":"2013-12-01T00:00:00Z","issue":"6","page":"24 - 25","publication":"IEEE Computer Graphics and Applications","day":"01","publication_status":"published","year":"2013"},{"type":"journal_article","status":"public","_id":"2079","author":[{"last_name":"Hildebrand","full_name":"Hildebrand, Kristian","first_name":"Kristian"},{"orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"first_name":"Marc","last_name":"Alexa","full_name":"Alexa, Marc"}],"publist_id":"4959","title":"crdbrd: Shape fabrication by sliding planar slices","citation":{"mla":"Hildebrand, Kristian, et al. “Crdbrd: Shape Fabrication by Sliding Planar Slices.” Computer Graphics Forum, vol. 31, no. 2pt3, Wiley-Blackwell, 2012, pp. 583–92, doi:10.1111/j.1467-8659.2012.03037.x.","ama":"Hildebrand K, Bickel B, Alexa M. crdbrd: Shape fabrication by sliding planar slices. Computer Graphics Forum. 2012;31(2pt3):583-592. doi:10.1111/j.1467-8659.2012.03037.x","apa":"Hildebrand, K., Bickel, B., & Alexa, M. (2012). crdbrd: Shape fabrication by sliding planar slices. Computer Graphics Forum. Wiley-Blackwell. https://doi.org/10.1111/j.1467-8659.2012.03037.x","ieee":"K. Hildebrand, B. Bickel, and M. Alexa, “crdbrd: Shape fabrication by sliding planar slices,” Computer Graphics Forum, vol. 31, no. 2pt3. Wiley-Blackwell, pp. 583–592, 2012.","short":"K. Hildebrand, B. Bickel, M. Alexa, Computer Graphics Forum 31 (2012) 583–592.","chicago":"Hildebrand, Kristian, Bernd Bickel, and Marc Alexa. “Crdbrd: Shape Fabrication by Sliding Planar Slices.” Computer Graphics Forum. Wiley-Blackwell, 2012. https://doi.org/10.1111/j.1467-8659.2012.03037.x.","ista":"Hildebrand K, Bickel B, Alexa M. 2012. crdbrd: Shape fabrication by sliding planar slices. Computer Graphics Forum. 31(2pt3), 583–592."},"date_updated":"2021-01-12T06:55:10Z","extern":1,"quality_controlled":0,"publisher":"Wiley-Blackwell","month":"05","intvolume":" 31","abstract":[{"text":"We introduce an algorithm and representation for fabricating 3D shape abstractions using mutually intersecting planar cut-outs. The planes have prefabricated slits at their intersections and are assembled by sliding them together. Often such abstractions are used as a sculptural art form or in architecture and are colloquially called ‘cardboard sculptures’. Based on an analysis of construction rules, we propose an extended binary space partitioning tree as an efficient representation of such cardboard models which allows us to quickly evaluate the feasibility of newly added planar elements. The complexity of insertion order quickly increases with the number of planar elements and manual analysis becomes intractable. We provide tools for generating cardboard sculptures with guaranteed constructibility. In combination with a simple optimization and sampling strategy for new elements, planar shape abstraction models can be designed by iteratively adding elements. As an output, we obtain a fabrication plan that can be printed or sent to a laser cutter. We demonstrate the complete process by designing and fabricating cardboard models of various well-known 3D shapes.","lang":"eng"}],"page":"583 - 592","doi":"10.1111/j.1467-8659.2012.03037.x","date_published":"2012-05-01T00:00:00Z","volume":31,"issue":"2pt3","date_created":"2018-12-11T11:55:35Z","year":"2012","publication_status":"published","day":"01","publication":"Computer Graphics Forum"},{"title":"Coupled 3D reconstruction of sparse facial hair and skin","publist_id":"4932","author":[{"first_name":"Thabo","last_name":"Beeler","full_name":"Beeler, Thabo"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel"},{"last_name":"Noris","full_name":"Noris, Gioacchino","first_name":"Gioacchino"},{"first_name":"Paul","full_name":"Beardsley, Paul A","last_name":"Beardsley"},{"last_name":"Marschner","full_name":"Marschner, Steve","first_name":"Steve"},{"last_name":"Sumner","full_name":"Sumner, Robert W","first_name":"Robert"},{"first_name":"Markus","full_name":"Groß, Markus S","last_name":"Groß"}],"extern":1,"date_updated":"2021-01-12T06:55:20Z","citation":{"mla":"Beeler, Thabo, et al. “Coupled 3D Reconstruction of Sparse Facial Hair and Skin.” ACM Transactions on Graphics, vol. 31, no. 4, ACM, 2012, doi:10.1145/2185520.2185613.","ama":"Beeler T, Bickel B, Noris G, et al. Coupled 3D reconstruction of sparse facial hair and skin. ACM Transactions on Graphics. 2012;31(4). doi:10.1145/2185520.2185613","apa":"Beeler, T., Bickel, B., Noris, G., Beardsley, P., Marschner, S., Sumner, R., & Groß, M. (2012). Coupled 3D reconstruction of sparse facial hair and skin. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2185520.2185613","ieee":"T. Beeler et al., “Coupled 3D reconstruction of sparse facial hair and skin,” ACM Transactions on Graphics, vol. 31, no. 4. ACM, 2012.","short":"T. Beeler, B. Bickel, G. Noris, P. Beardsley, S. Marschner, R. Sumner, M. Groß, ACM Transactions on Graphics 31 (2012).","chicago":"Beeler, Thabo, Bernd Bickel, Gioacchino Noris, Paul Beardsley, Steve Marschner, Robert Sumner, and Markus Groß. “Coupled 3D Reconstruction of Sparse Facial Hair and Skin.” ACM Transactions on Graphics. ACM, 2012. https://doi.org/10.1145/2185520.2185613.","ista":"Beeler T, Bickel B, Noris G, Beardsley P, Marschner S, Sumner R, Groß M. 2012. Coupled 3D reconstruction of sparse facial hair and skin. ACM Transactions on Graphics. 31(4)."},"status":"public","type":"journal_article","_id":"2103","volume":31,"issue":"4","doi":"10.1145/2185520.2185613","date_published":"2012-01-01T00:00:00Z","date_created":"2018-12-11T11:55:44Z","day":"01","publication":"ACM Transactions on Graphics","year":"2012","publication_status":"published","month":"01","intvolume":" 31","publisher":"ACM","quality_controlled":0,"abstract":[{"lang":"eng","text":"Although facial hair plays an important role in individual expression, facial-hair reconstruction is not addressed by current facecapture systems. Our research addresses this limitation with an algorithm that treats hair and skin surface capture together in a coupled fashion so that a high-quality representation of hair fibers as well as the underlying skin surface can be reconstructed. We propose a passive, camera-based system that is robust against arbitrary motion since all data is acquired within the time period of a single exposure. Our reconstruction algorithm detects and traces hairs in the captured images and reconstructs them in 3D using a multiview stereo approach. Our coupled skin-reconstruction algorithm uses information about the detected hairs to deliver a skin surface that lies underneath all hairs irrespective of occlusions. In dense regions like eyebrows, we employ a hair-synthesis method to create hair fibers that plausibly match the image data. We demonstrate our scanning system on a number of individuals and show that it can successfully reconstruct a variety of facial-hair styles together with the underlying skin surface."}]},{"year":"2012","publication_status":"published","publication":"ACM Transactions on Graphics","day":"01","date_created":"2018-12-11T11:55:43Z","volume":31,"issue":"4","date_published":"2012-01-01T00:00:00Z","doi":"10.1145/2185520.2185543","abstract":[{"text":"Articulated deformable characters are widespread in computer animation. Unfortunately, we lack methods for their automatic fabrication using modern additive manufacturing (AM) technologies. We propose a method that takes a skinned mesh as input, then estimates a fabricatable single-material model that approximates the 3D kinematics of the corresponding virtual articulated character in a piecewise linear manner. We first extract a set of potential joint locations. From this set, together with optional, user-specified range constraints, we then estimate mechanical friction joints that satisfy inter-joint non-penetration and other fabrication constraints. To avoid brittle joint designs, we place joint centers on an approximate medial axis representation of the input geometry, and maximize each joint's minimal cross-sectional area. We provide several demonstrations, manufactured as single, assembled pieces using 3D printers. ","lang":"eng"}],"acknowledgement":"This work was partially supported by NSF grant IIS-1116619. Doug James acknowledges support from Pixar and a fellowship from the John Simon Guggenheim Memorial Foundation","quality_controlled":0,"publisher":"ACM","intvolume":" 31","month":"01","date_updated":"2021-01-12T06:55:19Z","citation":{"short":"M. Bac̈Her, B. Bickel, D. James, H. Pfister, ACM Transactions on Graphics 31 (2012).","ieee":"M. Bac̈Her, B. Bickel, D. James, and H. Pfister, “Fabricating articulated characters from skinned meshes,” ACM Transactions on Graphics, vol. 31, no. 4. ACM, 2012.","apa":"Bac̈Her, M., Bickel, B., James, D., & Pfister, H. (2012). Fabricating articulated characters from skinned meshes. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2185520.2185543","ama":"Bac̈Her M, Bickel B, James D, Pfister H. Fabricating articulated characters from skinned meshes. ACM Transactions on Graphics. 2012;31(4). doi:10.1145/2185520.2185543","mla":"Bac̈Her, Moritz, et al. “Fabricating Articulated Characters from Skinned Meshes.” ACM Transactions on Graphics, vol. 31, no. 4, ACM, 2012, doi:10.1145/2185520.2185543.","ista":"Bac̈Her M, Bickel B, James D, Pfister H. 2012. Fabricating articulated characters from skinned meshes. ACM Transactions on Graphics. 31(4).","chicago":"Bac̈Her, Moritz, Bernd Bickel, Doug James, and Hanspeter Pfister. “Fabricating Articulated Characters from Skinned Meshes.” ACM Transactions on Graphics. ACM, 2012. https://doi.org/10.1145/2185520.2185543."},"extern":1,"author":[{"full_name":"Bac̈her, Moritz","last_name":"Bac̈Her","first_name":"Moritz"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","last_name":"Bickel"},{"first_name":"Doug","last_name":"James","full_name":"James, Doug L"},{"last_name":"Pfister","full_name":"Pfister, Hanspeter","first_name":"Hanspeter"}],"publist_id":"4933","title":"Fabricating articulated characters from skinned meshes","_id":"2101","type":"journal_article","status":"public"},{"publist_id":"4931","author":[{"full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"full_name":"Kaufmann, Peter","last_name":"Kaufmann","first_name":"Peter"},{"first_name":"Mélina","full_name":"Skouras, Mélina","last_name":"Skouras"},{"first_name":"Bernhard","last_name":"Thomaszewski","full_name":"Thomaszewski, Bernhard"},{"full_name":"Bradley, Derek J","last_name":"Bradley","first_name":"Derek"},{"full_name":"Beeler, Thabo","last_name":"Beeler","first_name":"Thabo"},{"last_name":"Jackson","full_name":"Jackson, Philip V","first_name":"Philip"},{"first_name":"Steve","last_name":"Marschner","full_name":"Marschner, Steve"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"},{"first_name":"Markus","last_name":"Groß","full_name":"Groß, Markus S"}],"title":"Physical face cloning","date_updated":"2021-01-12T06:55:19Z","citation":{"mla":"Bickel, Bernd, et al. “Physical Face Cloning.” ACM Transactions on Graphics, vol. 31, no. 4, ACM, 2012, doi:10.1145/2185520.2185614.","short":"B. Bickel, P. Kaufmann, M. Skouras, B. Thomaszewski, D. Bradley, T. Beeler, P. Jackson, S. Marschner, W. Matusik, M. Groß, ACM Transactions on Graphics 31 (2012).","ieee":"B. Bickel et al., “Physical face cloning,” ACM Transactions on Graphics, vol. 31, no. 4. ACM, 2012.","ama":"Bickel B, Kaufmann P, Skouras M, et al. Physical face cloning. ACM Transactions on Graphics. 2012;31(4). doi:10.1145/2185520.2185614","apa":"Bickel, B., Kaufmann, P., Skouras, M., Thomaszewski, B., Bradley, D., Beeler, T., … Groß, M. (2012). Physical face cloning. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2185520.2185614","chicago":"Bickel, Bernd, Peter Kaufmann, Mélina Skouras, Bernhard Thomaszewski, Derek Bradley, Thabo Beeler, Philip Jackson, Steve Marschner, Wojciech Matusik, and Markus Groß. “Physical Face Cloning.” ACM Transactions on Graphics. ACM, 2012. https://doi.org/10.1145/2185520.2185614.","ista":"Bickel B, Kaufmann P, Skouras M, Thomaszewski B, Bradley D, Beeler T, Jackson P, Marschner S, Matusik W, Groß M. 2012. Physical face cloning. ACM Transactions on Graphics. 31(4)."},"extern":1,"type":"journal_article","status":"public","_id":"2102","issue":"4","volume":31,"doi":"10.1145/2185520.2185614","date_published":"2012-07-04T00:00:00Z","date_created":"2018-12-11T11:55:43Z","year":"2012","publication_status":"published","day":"04","publication":"ACM Transactions on Graphics","quality_controlled":0,"publisher":"ACM","month":"07","intvolume":" 31","abstract":[{"lang":"eng","text":"We propose a complete process for designing, simulating, and fabricating synthetic skin for an animatronics character that mimics the face of a given subject and its expressions. The process starts with measuring the elastic properties of a material used to manufacture synthetic soft tissue. Given these measurements we use physicsbased simulation to predict the behavior of a face when it is driven by the underlying robotic actuation. Next, we capture 3D facial expressions for a given target subject. As the key component of our process, we present a novel optimization scheme that determines the shape of the synthetic skin as well as the actuation parameters that provide the best match to the target expressions. We demonstrate this computational skin design by physically cloning a real human face onto an animatronics figure. "}],"acknowledgement":"This work was supported in part by the NCCR Co-Me of the Swiss NSF"},{"date_updated":"2021-01-12T06:55:21Z","citation":{"ista":"Miguel E, Bradley D, Thomaszewski B, Bickel B, Matusik W, Otaduy M, Marschner S. 2012. Data-driven estimation of cloth simulation models. Computer Graphics Forum vol. 31, 519–528.","chicago":"Miguel, Eder, Derek Bradley, Bernhard Thomaszewski, Bernd Bickel, Wojciech Matusik, Miguel Otaduy, and Steve Marschner. “Data-Driven Estimation of Cloth Simulation Models,” 31:519–28. Wiley-Blackwell, 2012. https://doi.org/10.1111/j.1467-8659.2012.03031.x.","ama":"Miguel E, Bradley D, Thomaszewski B, et al. Data-driven estimation of cloth simulation models. In: Vol 31. Wiley-Blackwell; 2012:519-528. doi:10.1111/j.1467-8659.2012.03031.x","apa":"Miguel, E., Bradley, D., Thomaszewski, B., Bickel, B., Matusik, W., Otaduy, M., & Marschner, S. (2012). Data-driven estimation of cloth simulation models (Vol. 31, pp. 519–528). Presented at the Computer Graphics Forum, Wiley-Blackwell. https://doi.org/10.1111/j.1467-8659.2012.03031.x","short":"E. Miguel, D. Bradley, B. Thomaszewski, B. Bickel, W. Matusik, M. Otaduy, S. Marschner, in:, Wiley-Blackwell, 2012, pp. 519–528.","ieee":"E. Miguel et al., “Data-driven estimation of cloth simulation models,” presented at the Computer Graphics Forum, 2012, vol. 31, no. 2, pp. 519–528.","mla":"Miguel, Eder, et al. Data-Driven Estimation of Cloth Simulation Models. Vol. 31, no. 2, Wiley-Blackwell, 2012, pp. 519–28, doi:10.1111/j.1467-8659.2012.03031.x."},"extern":1,"publist_id":"4929","author":[{"first_name":"Eder","last_name":"Miguel","full_name":"Miguel, Eder"},{"first_name":"Derek","full_name":"Bradley, Derek J","last_name":"Bradley"},{"full_name":"Thomaszewski, Bernhard","last_name":"Thomaszewski","first_name":"Bernhard"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"},{"last_name":"Otaduy","full_name":"Otaduy, Miguel A","first_name":"Miguel"},{"first_name":"Steve","last_name":"Marschner","full_name":"Marschner, Steve"}],"title":"Data-driven estimation of cloth simulation models","_id":"2106","conference":{"name":"Computer Graphics Forum"},"type":"conference","status":"public","publication_status":"published","year":"2012","day":"01","page":"519 - 528","date_created":"2018-12-11T11:55:45Z","date_published":"2012-05-01T00:00:00Z","doi":"10.1111/j.1467-8659.2012.03031.x","issue":"2","volume":31,"abstract":[{"lang":"eng","text":"Progress in cloth simulation for computer animation and apparel design has led to a multitude of deformation models, each with its own way of relating geometry, deformation, and forces. As simulators improve, differences between these models become more important, but it is difficult to choose a model and a set of parameters to match a given real material simply by looking at simulation results. This paper provides measurement and fitting methods that allow nonlinear models to be fit to the observed deformation of a particular cloth sample. Unlike standard textile testing, our system measures complex 3D deformations of a sheet of cloth, not just one-dimensional force-displacement curves, so it works under a wider range of deformation conditions. The fitted models are then evaluated by comparison to measured deformations with motions very different from those used for fitting."}],"acknowledgement":"This work was funded in part by the Spanish Ministry of Science and Innovation, project TIN2009-07942, and by the European Research Council, project ERC-2011-StG-280135 Animetrics.","publisher":"Wiley-Blackwell","quality_controlled":0,"intvolume":" 31","month":"05"},{"month":"01","publisher":"ACM","quality_controlled":0,"abstract":[{"text":"In recent years, various methods have been introduced to exploit pre-recorded data to improve the performance and/or realism of dynamic deformations, but their differences and similarities have not been adequately analyzed or discussed. So far, the proposed methods have been explored mainly in the research context. They have not been adopted by the computer graphics industry. This course bridges the gap between research labs and industry to present a unifying theory and understanding of data-driven methods for dynamic deformations that may inspire development of novel solutions. It focuses on application of data-driven methods to three areas of computer animation: dynamic deformation of faces, soft volumetric tissue, and cloth. And it describes how to approach these challenges in a data-driven manner, classifies the various methods, and demonstrates how data-driven methods can work in other settings. ","lang":"eng"}],"date_published":"2012-01-01T00:00:00Z","doi":"10.1145/2343483.2343495","date_created":"2018-12-11T11:55:44Z","day":"01","year":"2012","publication_status":"published","status":"public","type":"conference","conference":{"name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques"},"_id":"2104","title":"Data-driven simulation methods in computer graphics: Cloth, tissue and faces","publist_id":"4930","author":[{"last_name":"Otaduy","full_name":"Otaduy, Miguel A","first_name":"Miguel"},{"full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"full_name":"Bradley, Derek J","last_name":"Bradley","first_name":"Derek"},{"first_name":"Huamin","full_name":"Wang, Huamin","last_name":"Wang"}],"extern":1,"citation":{"chicago":"Otaduy, Miguel, Bernd Bickel, Derek Bradley, and Huamin Wang. “Data-Driven Simulation Methods in Computer Graphics: Cloth, Tissue and Faces.” ACM, 2012. https://doi.org/10.1145/2343483.2343495.","ista":"Otaduy M, Bickel B, Bradley D, Wang H. 2012. Data-driven simulation methods in computer graphics: Cloth, tissue and faces. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques.","mla":"Otaduy, Miguel, et al. Data-Driven Simulation Methods in Computer Graphics: Cloth, Tissue and Faces. ACM, 2012, doi:10.1145/2343483.2343495.","ieee":"M. Otaduy, B. Bickel, D. Bradley, and H. Wang, “Data-driven simulation methods in computer graphics: Cloth, tissue and faces,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, 2012.","short":"M. Otaduy, B. Bickel, D. Bradley, H. Wang, in:, ACM, 2012.","ama":"Otaduy M, Bickel B, Bradley D, Wang H. Data-driven simulation methods in computer graphics: Cloth, tissue and faces. In: ACM; 2012. doi:10.1145/2343483.2343495","apa":"Otaduy, M., Bickel, B., Bradley, D., & Wang, H. (2012). Data-driven simulation methods in computer graphics: Cloth, tissue and faces. Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, ACM. https://doi.org/10.1145/2343483.2343495"},"date_updated":"2021-01-12T06:55:20Z"},{"month":"05","intvolume":" 31","publisher":"Wiley-Blackwell","quality_controlled":0,"acknowledgement":"Mélina Skouras was partially supported by the NCCR Co-Me of the Swiss National Science Foundation.","doi":"10.1111/j.1467-8659.2012.03064.x","issue":"2","volume":31,"date_published":"2012-05-01T00:00:00Z","date_created":"2018-12-11T11:55:45Z","page":"835 - 844","day":"01","year":"2012","publication_status":"published","status":"public","type":"conference","conference":{"name":"EUROGRAPHICS: European Association for Computer Graphics"},"_id":"2105","title":"Computational design of rubber balloons","publist_id":"4928","author":[{"first_name":"Mélina","full_name":"Skouras, Mélina","last_name":"Skouras"},{"full_name":"Thomaszewski, Bernhard","last_name":"Thomaszewski","first_name":"Bernhard"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","last_name":"Bickel","full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385"},{"first_name":"Markus","full_name":"Groß, Markus S","last_name":"Groß"}],"extern":1,"citation":{"ama":"Skouras M, Thomaszewski B, Bickel B, Groß M. Computational design of rubber balloons. In: Vol 31. Wiley-Blackwell; 2012:835-844. doi:10.1111/j.1467-8659.2012.03064.x","apa":"Skouras, M., Thomaszewski, B., Bickel, B., & Groß, M. (2012). Computational design of rubber balloons (Vol. 31, pp. 835–844). Presented at the EUROGRAPHICS: European Association for Computer Graphics, Wiley-Blackwell. https://doi.org/10.1111/j.1467-8659.2012.03064.x","short":"M. Skouras, B. Thomaszewski, B. Bickel, M. Groß, in:, Wiley-Blackwell, 2012, pp. 835–844.","ieee":"M. Skouras, B. Thomaszewski, B. Bickel, and M. Groß, “Computational design of rubber balloons,” presented at the EUROGRAPHICS: European Association for Computer Graphics, 2012, vol. 31, no. 2, pp. 835–844.","mla":"Skouras, Mélina, et al. Computational Design of Rubber Balloons. Vol. 31, no. 2, Wiley-Blackwell, 2012, pp. 835–44, doi:10.1111/j.1467-8659.2012.03064.x.","ista":"Skouras M, Thomaszewski B, Bickel B, Groß M. 2012. Computational design of rubber balloons. EUROGRAPHICS: European Association for Computer Graphics vol. 31, 835–844.","chicago":"Skouras, Mélina, Bernhard Thomaszewski, Bernd Bickel, and Markus Groß. “Computational Design of Rubber Balloons,” 31:835–44. Wiley-Blackwell, 2012. https://doi.org/10.1111/j.1467-8659.2012.03064.x."},"date_updated":"2021-01-12T06:55:20Z"},{"title":"High-quality passive facial performance capture using anchor frames","author":[{"full_name":"Beeler, Thabo","last_name":"Beeler","first_name":"Thabo"},{"first_name":"Fabian","full_name":"Hahn, Fabian","last_name":"Hahn"},{"full_name":"Bradley, Derek J","last_name":"Bradley","first_name":"Derek"},{"last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"full_name":"Beardsley, Paul A","last_name":"Beardsley","first_name":"Paul"},{"first_name":"Craig","last_name":"Gotsman","full_name":"Gotsman, Craig"},{"first_name":"Robert","full_name":"Sumner, Robert W","last_name":"Sumner"},{"first_name":"Markus","full_name":"Groß, Markus S","last_name":"Groß"}],"publist_id":"4936","extern":1,"date_updated":"2021-01-12T06:55:17Z","citation":{"mla":"Beeler, Thabo, et al. “High-Quality Passive Facial Performance Capture Using Anchor Frames.” ACM Transactions on Graphics, vol. 30, no. 4, ACM, 2011, doi:10.1145/2010324.1964970.","apa":"Beeler, T., Hahn, F., Bradley, D., Bickel, B., Beardsley, P., Gotsman, C., … Groß, M. (2011). High-quality passive facial performance capture using anchor frames. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/2010324.1964970","ama":"Beeler T, Hahn F, Bradley D, et al. High-quality passive facial performance capture using anchor frames. ACM Transactions on Graphics. 2011;30(4). doi:10.1145/2010324.1964970","short":"T. Beeler, F. Hahn, D. Bradley, B. Bickel, P. Beardsley, C. Gotsman, R. Sumner, M. Groß, ACM Transactions on Graphics 30 (2011).","ieee":"T. Beeler et al., “High-quality passive facial performance capture using anchor frames,” ACM Transactions on Graphics, vol. 30, no. 4. ACM, 2011.","chicago":"Beeler, Thabo, Fabian Hahn, Derek Bradley, Bernd Bickel, Paul Beardsley, Craig Gotsman, Robert Sumner, and Markus Groß. “High-Quality Passive Facial Performance Capture Using Anchor Frames.” ACM Transactions on Graphics. ACM, 2011. https://doi.org/10.1145/2010324.1964970.","ista":"Beeler T, Hahn F, Bradley D, Bickel B, Beardsley P, Gotsman C, Sumner R, Groß M. 2011. High-quality passive facial performance capture using anchor frames. ACM Transactions on Graphics. 30(4)."},"status":"public","type":"journal_article","_id":"2099","date_created":"2018-12-11T11:55:42Z","doi":"10.1145/2010324.1964970","issue":"4","date_published":"2011-07-01T00:00:00Z","volume":30,"publication":"ACM Transactions on Graphics","day":"01","publication_status":"published","year":"2011","intvolume":" 30","month":"07","quality_controlled":0,"publisher":"ACM","abstract":[{"text":"We present a new technique for passive and markerless facial performance capture based on anchor frames. Our method starts with high resolution per-frame geometry acquisition using state-of-theart stereo reconstruction, and proceeds to establish a single triangle mesh that is propagated through the entire performance. Leveraging the fact that facial performances often contain repetitive subsequences, we identify anchor frames as those which contain similar facial expressions to a manually chosen reference expression. Anchor frames are automatically computed over one or even multiple performances. We introduce a robust image-space tracking method that computes pixel matches directly from the reference frame to all anchor frames, and thereby to the remaining frames in the sequence via sequential matching. This allows us to propagate one reconstructed frame to an entire sequence in parallel, in contrast to previous sequential methods. Our anchored reconstruction approach also limits tracker drift and robustly handles occlusions and motion blur. The parallel tracking and mesh propagation offer low computation times. Our technique will even automatically match anchor frames across different sequences captured on different occasions, propagating a single mesh to all performances.","lang":"eng"}]},{"extern":1,"date_updated":"2021-01-12T06:55:17Z","citation":{"ista":"Bickel B, Lang M. 2011.From sparse mocap to highly detailed facial animation. In: GPU Computing Gems Emerald Edition. , 413–426.","chicago":"Bickel, Bernd, and Manuel Lang. “From Sparse Mocap to Highly Detailed Facial Animation.” In GPU Computing Gems Emerald Edition, 413–26. Science Direct, 2011. https://doi.org/10.1016/B978-0-12-384988-5.00027-9.","short":"B. Bickel, M. Lang, in:, GPU Computing Gems Emerald Edition, Science Direct, 2011, pp. 413–426.","ieee":"B. Bickel and M. Lang, “From sparse mocap to highly detailed facial animation,” in GPU Computing Gems Emerald Edition, Science Direct, 2011, pp. 413–426.","apa":"Bickel, B., & Lang, M. (2011). From sparse mocap to highly detailed facial animation. In GPU Computing Gems Emerald Edition (pp. 413–426). Science Direct. https://doi.org/10.1016/B978-0-12-384988-5.00027-9","ama":"Bickel B, Lang M. From sparse mocap to highly detailed facial animation. In: GPU Computing Gems Emerald Edition. Science Direct; 2011:413-426. doi:10.1016/B978-0-12-384988-5.00027-9","mla":"Bickel, Bernd, and Manuel Lang. “From Sparse Mocap to Highly Detailed Facial Animation.” GPU Computing Gems Emerald Edition, Science Direct, 2011, pp. 413–26, doi:10.1016/B978-0-12-384988-5.00027-9."},"title":"From sparse mocap to highly detailed facial animation","publist_id":"4935","author":[{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel"},{"first_name":"Manuel","full_name":"Lang, Manuel","last_name":"Lang"}],"_id":"2098","status":"public","type":"book_chapter","day":"01","publication":"GPU Computing Gems Emerald Edition","publication_status":"published","year":"2011","doi":"10.1016/B978-0-12-384988-5.00027-9","date_published":"2011-01-01T00:00:00Z","date_created":"2018-12-11T11:55:42Z","page":"413 - 426","abstract":[{"lang":"eng","text":"This chapter presents a method for real-time animation of highly detailed facial expressions based on sparse motion captures data and a limited set of static example poses. The method for real-time animation of highly detailed facial expressions decomposes geometry into large-scale motion and fine-scale details, such as expression wrinkles. Both large- and fine-scale deformation algorithms run entirely on the GPU, and our implementation based on CUDA achieves an overall performance of about 30 fps. The face conveys the most relevant visual characteristics of human identity and expression. Hence, realistic facial animations or interactions with virtual avatars are important for storytelling and gameplay. However, current approaches are either computationally expensive, require very specialized capture hardware, or are extremely labor intensive. At runtime, given an arbitrary facial expression, the algorithm computes the skin strain from the relative distance between marker points and derives fine-scale corrections for the largescale deformation. During gameplay only the sparse set of marker-point positions is transmitted to the GPU. The face animation is entirely computed on the GPU where the resulting mesh can directly be used as input for the rendering stages. This data can be easily obtained by traditional capture hardware. The proposed in-game algorithm is fast. It also is easy to implement and maps well onto programmable GPUs."}],"month":"01","quality_controlled":0,"publisher":"Science Direct"},{"quality_controlled":0,"publisher":"ACM","month":"12","abstract":[{"lang":"eng","text":"Acquiring panoramic images using stitching takes a lot of time and moving objects may cause ghosting. It is also difficult to obtain a full spherical panorama, because the downward picture cannot be captured while the camera is mounted on the tripod."}],"date_published":"2011-12-01T00:00:00Z","doi":"10.1145/2073370.2073373","date_created":"2018-12-11T11:55:43Z","year":"2011","publication_status":"published","day":"01","type":"conference","conference":{"name":"SIGGRAPH Asia"},"status":"public","_id":"2100","publist_id":"4934","author":[{"first_name":"Jonas","full_name":"Pfeil, Jonas","last_name":"Pfeil"},{"first_name":"Kristian","last_name":"Hildebrand","full_name":"Hildebrand, Kristian"},{"first_name":"Carsten","full_name":"Gremzow, Carsten","last_name":"Gremzow"},{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel"},{"first_name":"Marc","full_name":"Alexa, Marc","last_name":"Alexa"}],"title":"Throwable panoramic ball camera","date_updated":"2021-01-12T06:55:19Z","citation":{"chicago":"Pfeil, Jonas, Kristian Hildebrand, Carsten Gremzow, Bernd Bickel, and Marc Alexa. “Throwable Panoramic Ball Camera.” ACM, 2011. https://doi.org/10.1145/2073370.2073373.","ista":"Pfeil J, Hildebrand K, Gremzow C, Bickel B, Alexa M. 2011. Throwable panoramic ball camera. SIGGRAPH Asia.","mla":"Pfeil, Jonas, et al. Throwable Panoramic Ball Camera. ACM, 2011, doi:10.1145/2073370.2073373.","ieee":"J. Pfeil, K. Hildebrand, C. Gremzow, B. Bickel, and M. Alexa, “Throwable panoramic ball camera,” presented at the SIGGRAPH Asia, 2011.","short":"J. Pfeil, K. Hildebrand, C. Gremzow, B. Bickel, M. Alexa, in:, ACM, 2011.","ama":"Pfeil J, Hildebrand K, Gremzow C, Bickel B, Alexa M. Throwable panoramic ball camera. In: ACM; 2011. doi:10.1145/2073370.2073373","apa":"Pfeil, J., Hildebrand, K., Gremzow, C., Bickel, B., & Alexa, M. (2011). Throwable panoramic ball camera. Presented at the SIGGRAPH Asia, ACM. https://doi.org/10.1145/2073370.2073373"},"extern":1},{"_id":"2075","status":"public","type":"dissertation","extern":1,"date_updated":"2021-01-12T06:55:09Z","citation":{"mla":"Bickel, Bernd. “Measurement-Based Modeling and Fabrication of Deformable Materials for Human Faces.” Unknown, vol. 499, no. 7458, Unknown, 2010, doi:dx.doi.org/10.3929/ethz-a-006354908.","ieee":"B. Bickel, “Measurement-based modeling and fabrication of deformable materials for human faces,” Unknown, 2010.","short":"B. Bickel, Measurement-Based Modeling and Fabrication of Deformable Materials for Human Faces, Unknown, 2010.","apa":"Bickel, B. (2010). Measurement-based modeling and fabrication of deformable materials for human faces. Unknown. Unknown. https://doi.org/dx.doi.org/10.3929/ethz-a-006354908","ama":"Bickel B. Measurement-based modeling and fabrication of deformable materials for human faces. Unknown. 2010;499(7458). doi:dx.doi.org/10.3929/ethz-a-006354908","chicago":"Bickel, Bernd. “Measurement-Based Modeling and Fabrication of Deformable Materials for Human Faces.” Unknown. Unknown, 2010. https://doi.org/dx.doi.org/10.3929/ethz-a-006354908.","ista":"Bickel B. 2010. Measurement-based modeling and fabrication of deformable materials for human faces. Unknown."},"title":"Measurement-based modeling and fabrication of deformable materials for human faces","publist_id":"4963","author":[{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel"}],"abstract":[{"text":"This thesis investigates the combination of data-driven and physically based techniques for acquiring, modeling, and animating deformable materials, with a special focus on human faces. Furthermore, based on these techniques, we introduce a data-driven process for designing and fabricating materials with desired deformation behavior. \nRealistic simulation behavior, surface details, and appearance are still demanding tasks. Neither pure data-driven, pure procedural, nor pure physical methods are best suited for accurate synthesis of facial motion and details (both for appearance and geometry), due to the difficulties in model design, parameter estimation, and desired controllability for animators. Capturing of a small but representative amount of real data, and then synthesizing diverse on-demand examples with physically-based models and real data as input benefits from both sides: Highly realistic model behavior due to real-world data and controllability due to physically-based models.\nTo model the face and its behavior, hybrid physically-based and data-driven approaches are elaborated. We investigate surface-based representations as well as a solid representation based on FEM. To achieve realistic behavior, we propose to build light-weighted data capture devices to acquire real-world data to estimate model parameters and to employ concepts from data-driven modeling techniques and machine learning. The resulting models support simple acquisition systems, offer techniques to process and extract model parameters from real-world data, provide a compact representation of the facial geometry and its motion, and allow intuitive editing. We demonstrate applications such as capture of facial geometry and motion and real-time animation and transfer of facial details, and show that our soft tissue model can react to external forces and produce realistic deformations beyond facial expressions.\nBased on this model, we furthermore introduce a data-driven process for designing and fabricating materials with desired deformation behavior. The process starts with measuring deformation properties of base materials. Each material is represented as a non-linear stress-strain relationship in a finite-element model. For material design and fabrication, we introduce an optimization process that finds the best combination of base materials that meets a user’s criteria specified by example deformations. Our algorithm employs a number of strategies to prune poor solutions from the combinatorial search space. We finally demonstrate the complete process by designing and fabricating objects with complex heterogeneous materials using modern multi-material 3D printers.\n","lang":"eng"}],"month":"01","intvolume":" 499","quality_controlled":0,"publisher":"Unknown","day":"01","publication":"Unknown","year":"2010","publication_status":"published","volume":499,"date_published":"2010-01-01T00:00:00Z","doi":"dx.doi.org/10.3929/ethz-a-006354908","issue":"7458","date_created":"2018-12-11T11:55:34Z"},{"publist_id":"4938","author":[{"first_name":"Thabo","full_name":"Beeler, Thabo","last_name":"Beeler"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel"},{"first_name":"Paul","last_name":"Beardsley","full_name":"Beardsley, Paul A"},{"first_name":"Bob","last_name":"Sumner","full_name":"Sumner, Bob"},{"full_name":"Groß, Markus S","last_name":"Groß","first_name":"Markus"}],"title":"High-quality single-shot capture of facial geometry","citation":{"mla":"Beeler, Thabo, et al. “High-Quality Single-Shot Capture of Facial Geometry.” ACM Transactions on Graphics, vol. 29, no. 4, ACM, 2010, doi:10.1145/1778765.1778777.","apa":"Beeler, T., Bickel, B., Beardsley, P., Sumner, B., & Groß, M. (2010). High-quality single-shot capture of facial geometry. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/1778765.1778777","ama":"Beeler T, Bickel B, Beardsley P, Sumner B, Groß M. High-quality single-shot capture of facial geometry. ACM Transactions on Graphics. 2010;29(4). doi:10.1145/1778765.1778777","ieee":"T. Beeler, B. Bickel, P. Beardsley, B. Sumner, and M. Groß, “High-quality single-shot capture of facial geometry,” ACM Transactions on Graphics, vol. 29, no. 4. ACM, 2010.","short":"T. Beeler, B. Bickel, P. Beardsley, B. Sumner, M. Groß, ACM Transactions on Graphics 29 (2010).","chicago":"Beeler, Thabo, Bernd Bickel, Paul Beardsley, Bob Sumner, and Markus Groß. “High-Quality Single-Shot Capture of Facial Geometry.” ACM Transactions on Graphics. ACM, 2010. https://doi.org/10.1145/1778765.1778777.","ista":"Beeler T, Bickel B, Beardsley P, Sumner B, Groß M. 2010. High-quality single-shot capture of facial geometry. ACM Transactions on Graphics. 29(4)."},"date_updated":"2021-01-12T06:55:16Z","extern":1,"type":"journal_article","status":"public","_id":"2095","date_created":"2018-12-11T11:55:41Z","date_published":"2010-01-01T00:00:00Z","issue":"4","volume":29,"doi":"10.1145/1778765.1778777","year":"2010","publication_status":"published","publication":"ACM Transactions on Graphics","day":"01","main_file_link":[{"url":"http://e-collection.library.ethz.ch/view/eth:5079","open_access":"1"}],"oa":1,"publisher":"ACM","quality_controlled":0,"intvolume":" 29","month":"01","abstract":[{"lang":"eng","text":"This paper describes a passive stereo system for capturing the 3D geometry of a face in a single-shot under standard light sources. The system is low-cost and easy to deploy. Results are submillimeter accurate and commensurate with those from state-ofthe-art systems based on active lighting, and the models meet the quality requirements of a demanding domain like the movie industry. Recovered models are shown for captures from both high-end cameras in a studio setting and from a consumer binocular-stereo camera, demonstrating scalability across a spectrum of camera deployments, and showing the potential for 3D face modeling to move beyond the professional arena and into the emerging consumer market in stereoscopic photography. Our primary technical contribution is a modification of standard stereo refinement methods to capture pore-scale geometry, using a qualitative approach that produces visually realistic results. The second technical contribution is a calibration method suited to face capture systems. The systemic contribution includes multiple demonstrations of system robustness and quality. These include capture in a studio setup, capture off a consumer binocular-stereo camera, scanning of faces of varying gender and ethnicity and age, capture of highly-transient facial expression, and scanning a physical mask to provide ground-truth validation."}]},{"publist_id":"4937","author":[{"full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","last_name":"Bickel","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"first_name":"Moritz","full_name":"Bac̈her, Moritz","last_name":"Bac̈Her"},{"last_name":"Otaduy","full_name":"Otaduy, Miguel A","first_name":"Miguel"},{"last_name":"Lee","full_name":"Lee, Hyunho R","first_name":"Hyunho"},{"first_name":"Hanspeter","full_name":"Pfister, Hanspeter","last_name":"Pfister"},{"last_name":"Groß","full_name":"Groß, Markus S","first_name":"Markus"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"}],"title":"Design and fabrication of materials with desired deformation behavior","date_updated":"2021-01-12T06:55:17Z","citation":{"ista":"Bickel B, Bac̈Her M, Otaduy M, Lee H, Pfister H, Groß M, Matusik W. 2010. Design and fabrication of materials with desired deformation behavior. ACM Transactions on Graphics. 29(4).","chicago":"Bickel, Bernd, Moritz Bac̈Her, Miguel Otaduy, Hyunho Lee, Hanspeter Pfister, Markus Groß, and Wojciech Matusik. “Design and Fabrication of Materials with Desired Deformation Behavior.” ACM Transactions on Graphics. ACM, 2010. https://doi.org/10.1145/1778765.1778800.","apa":"Bickel, B., Bac̈Her, M., Otaduy, M., Lee, H., Pfister, H., Groß, M., & Matusik, W. (2010). Design and fabrication of materials with desired deformation behavior. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/1778765.1778800","ama":"Bickel B, Bac̈Her M, Otaduy M, et al. Design and fabrication of materials with desired deformation behavior. ACM Transactions on Graphics. 2010;29(4). doi:10.1145/1778765.1778800","ieee":"B. Bickel et al., “Design and fabrication of materials with desired deformation behavior,” ACM Transactions on Graphics, vol. 29, no. 4. ACM, 2010.","short":"B. Bickel, M. Bac̈Her, M. Otaduy, H. Lee, H. Pfister, M. Groß, W. Matusik, ACM Transactions on Graphics 29 (2010).","mla":"Bickel, Bernd, et al. “Design and Fabrication of Materials with Desired Deformation Behavior.” ACM Transactions on Graphics, vol. 29, no. 4, ACM, 2010, doi:10.1145/1778765.1778800."},"extern":1,"type":"journal_article","status":"public","_id":"2097","doi":"10.1145/1778765.1778800","volume":29,"date_published":"2010-07-01T00:00:00Z","issue":"4","date_created":"2018-12-11T11:55:41Z","publication_status":"published","year":"2010","day":"01","publication":"ACM Transactions on Graphics","quality_controlled":0,"publisher":"ACM","month":"07","intvolume":" 29","abstract":[{"lang":"eng","text":"This paper introduces a data-driven process for designing and fabricating materials with desired deformation behavior. Our process starts with measuring deformation properties of base materials. For each base material we acquire a set of example deformations, and we represent the material as a non-linear stress-strain relationship in a finite-element model. We have validated our material measurement process by comparing simulations of arbitrary stacks of base materials with measured deformations of fabricated material stacks. After material measurement, our process continues with designing stacked layers of base materials. We introduce an optimization process that finds the best combination of stacked layers that meets a user's criteria specified by example deformations. Our algorithm employs a number of strategies to prune poor solutions from the combinatorial search space. We demonstrate the complete process by designing and fabricating objects with complex heterogeneous materials using modern multi-material 3D printers."}],"acknowledgement":"Otaduy was supported in part by the Spanish Dept. of Science and Innovation (project TIN-2009-07942)."},{"_id":"2096","status":"public","type":"journal_article","extern":1,"date_updated":"2021-01-12T06:55:16Z","citation":{"ieee":"H. Kim, B. Bickel, M. Groß, and S. Choi, “Subsurface scattering using splat-based diffusion in point-based rendering,” Science in China, Series F: Information Sciences, vol. 53, no. 5. Springer, pp. 911–919, 2010.","short":"H. Kim, B. Bickel, M. Groß, S. Choi, Science in China, Series F: Information Sciences 53 (2010) 911–919.","ama":"Kim H, Bickel B, Groß M, Choi S. Subsurface scattering using splat-based diffusion in point-based rendering. Science in China, Series F: Information Sciences. 2010;53(5):911-919. doi:10.1007/s11432-010-0068-y","apa":"Kim, H., Bickel, B., Groß, M., & Choi, S. (2010). Subsurface scattering using splat-based diffusion in point-based rendering. Science in China, Series F: Information Sciences. Springer. https://doi.org/10.1007/s11432-010-0068-y","mla":"Kim, Hyeonjoong, et al. “Subsurface Scattering Using Splat-Based Diffusion in Point-Based Rendering.” Science in China, Series F: Information Sciences, vol. 53, no. 5, Springer, 2010, pp. 911–19, doi:10.1007/s11432-010-0068-y.","ista":"Kim H, Bickel B, Groß M, Choi S. 2010. Subsurface scattering using splat-based diffusion in point-based rendering. Science in China, Series F: Information Sciences. 53(5), 911–919.","chicago":"Kim, Hyeonjoong, Bernd Bickel, Markus Groß, and Soomi Choi. “Subsurface Scattering Using Splat-Based Diffusion in Point-Based Rendering.” Science in China, Series F: Information Sciences. Springer, 2010. https://doi.org/10.1007/s11432-010-0068-y."},"title":"Subsurface scattering using splat-based diffusion in point-based rendering","publist_id":"4939","author":[{"last_name":"Kim","full_name":"Kim, Hyeonjoong","first_name":"Hyeonjoong"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel"},{"last_name":"Groß","full_name":"Groß, Markus S","first_name":"Markus"},{"first_name":"Soomi","last_name":"Choi","full_name":"Choi, Soomi"}],"abstract":[{"text":"Point-based graphics has gained much attention as an alternative to polygon-based approaches because of its simplicity and flexibility. However, current point-based techniques do not provide a sufficient rendering quality for translucent materials such as human skin. In this paper, we propose a point-based framework with subsurface scattering of light, which is important to create the soft and semi-translucent appearance of human skin. To accurately simulate subsurface scattering in multilayered materials, we present splat-based diffusion to apply a linear combination of several Gaussian basis functions to each splat in object space. Compared to existing point-based approaches, our method offers a significantly improved visual quality in rendering human faces and provides a similar visual quality to polygon-based rendering using the texture space diffusion technique. We demonstrate the effectiveness of our approach in rendering scanned faces realistically.","lang":"eng"}],"intvolume":" 53","month":"04","publisher":"Springer","quality_controlled":0,"publication":"Science in China, Series F: Information Sciences","day":"14","publication_status":"published","year":"2010","date_created":"2018-12-11T11:55:41Z","volume":53,"date_published":"2010-04-14T00:00:00Z","doi":"10.1007/s11432-010-0068-y","issue":"5","page":"911 - 919"},{"year":"2009","publication_status":"published","day":"27","date_created":"2018-12-11T11:55:40Z","issue":"3","volume":28,"doi":"10.1145/1576246.1531395 ","date_published":"2009-07-27T00:00:00Z","abstract":[{"text":"This paper introduces a data-driven representation and modeling technique for simulating non-linear heterogeneous soft tissue. It simplifies the construction of convincing deformable models by avoiding complex selection and tuning of physical material parameters, yet retaining the richness of non-linear heterogeneous behavior. We acquire a set of example deformations of a real object, and represent each of them as a spatially varying stress-strain relationship in a finite-element model. We then model the material by non-linear interpolation of these stress-strain relationships in strain-space. Our method relies on a simple-to-build capture system and an efficient run-time simulation algorithm based on incremental loading, making it suitable for interactive computer graphics applications. We present the results of our approach for several non-linear materials and biological soft tissue, with accurate agreement of our model to the measured data. ","lang":"eng"}],"acknowledgement":"This research was supported by the NCCR Co-Me grant of the Swiss National Science Foundation. Moritz Bacher was partially supported by the Initiative in Innovative Computing (IIC) and the School of Engineering and Applied Sciences (SEAS) at Harvard. ","quality_controlled":0,"publisher":"ACM","intvolume":" 28","month":"07","citation":{"mla":"Bickel, Bernd, et al. Capture and Modeling of Non-Linear Heterogeneous Soft Tissue. Vol. 28, no. 3, ACM, 2009, doi:10.1145/1576246.1531395 .","ama":"Bickel B, Bac̈Her M, Otaduy M, Matusik W, Pfister H, Groß M. Capture and modeling of non-linear heterogeneous soft tissue. In: Vol 28. ACM; 2009. doi:10.1145/1576246.1531395 ","apa":"Bickel, B., Bac̈Her, M., Otaduy, M., Matusik, W., Pfister, H., & Groß, M. (2009). Capture and modeling of non-linear heterogeneous soft tissue (Vol. 28). Presented at the ACM SIGGRAPH, ACM. https://doi.org/10.1145/1576246.1531395 ","ieee":"B. Bickel, M. Bac̈Her, M. Otaduy, W. Matusik, H. Pfister, and M. Groß, “Capture and modeling of non-linear heterogeneous soft tissue,” presented at the ACM SIGGRAPH, 2009, vol. 28, no. 3.","short":"B. Bickel, M. Bac̈Her, M. Otaduy, W. Matusik, H. Pfister, M. Groß, in:, ACM, 2009.","chicago":"Bickel, Bernd, Moritz Bac̈Her, Miguel Otaduy, Wojciech Matusik, Hanspeter Pfister, and Markus Groß. “Capture and Modeling of Non-Linear Heterogeneous Soft Tissue,” Vol. 28. ACM, 2009. https://doi.org/10.1145/1576246.1531395 .","ista":"Bickel B, Bac̈Her M, Otaduy M, Matusik W, Pfister H, Groß M. 2009. Capture and modeling of non-linear heterogeneous soft tissue. ACM SIGGRAPH vol. 28."},"date_updated":"2019-04-26T07:22:08Z","extern":1,"author":[{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","last_name":"Bickel","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel"},{"full_name":"Bac̈her, Moritz","last_name":"Bac̈Her","first_name":"Moritz"},{"first_name":"Miguel","last_name":"Otaduy","full_name":"Otaduy, Miguel A"},{"last_name":"Matusik","full_name":"Matusik, Wojciech","first_name":"Wojciech"},{"first_name":"Hanspeter","full_name":"Pfister, Hanspeter","last_name":"Pfister"},{"first_name":"Markus","full_name":"Groß, Markus S","last_name":"Groß"}],"publist_id":"4940","title":"Capture and modeling of non-linear heterogeneous soft tissue","_id":"2094","conference":{"name":"ACM SIGGRAPH"},"type":"conference","status":"public"},{"oa_version":"None","acknowledgement":"This research was supported by the NCCR Co-Me of the Swiss National Science Foundation.","abstract":[{"text":"This paper presents a novel method for real-time animation of highly-detailed facial expressions based on a multi-scale decomposition of facial geometry into large-scale motion and fine-scale details, such as expression wrinkles. Our hybrid animation is tailored to the specific characteristics of large- and fine-scale facial deformations: Large-scale deformations are computed with a fast linear shell model, which is intuitively and accurately controlled through a sparse set of motion-capture markers or user-defined handle points. Fine-scale facial details are incorporated using a novel pose-space deformation technique, which learns the correspondence of sparse measurements of skin strain to wrinkle formation from a small set of example poses. Our hybrid method features real-time animation of highly-detailed faces with realistic wrinkle formation, and allows both large-scale deformations and fine-scale wrinkles to be edited intuitively. Furthermore, our pose-space representation enables the transfer of facial details to novel expressions or other facial models.","lang":"eng"}],"publisher":"ACM","language":[{"iso":"eng"}],"publication_status":"published","year":"2008","date_published":"2008-01-01T00:00:00Z","doi":"10.2312/SCA/SCA08/057-066","date_created":"2018-12-11T11:55:35Z","page":"57 - 66","_id":"2078","status":"public","type":"conference","conference":{"name":"SIGGRAPH: Eurographics Symposium on Computer Animation"},"extern":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"chicago":"Bickel, Bernd, Manuel Lang, Mario Botsch, Miguel Otaduy, and Markus Gross. “Pose-Space Animation and Transfer of Facial Details,” 57–66. ACM, 2008. https://doi.org/10.2312/SCA/SCA08/057-066.","ista":"Bickel B, Lang M, Botsch M, Otaduy M, Gross M. 2008. Pose-space animation and transfer of facial details. SIGGRAPH: Eurographics Symposium on Computer Animation, 57–66.","mla":"Bickel, Bernd, et al. Pose-Space Animation and Transfer of Facial Details. ACM, 2008, pp. 57–66, doi:10.2312/SCA/SCA08/057-066.","ama":"Bickel B, Lang M, Botsch M, Otaduy M, Gross M. Pose-space animation and transfer of facial details. In: ACM; 2008:57-66. doi:10.2312/SCA/SCA08/057-066","apa":"Bickel, B., Lang, M., Botsch, M., Otaduy, M., & Gross, M. (2008). Pose-space animation and transfer of facial details (pp. 57–66). Presented at the SIGGRAPH: Eurographics Symposium on Computer Animation, ACM. https://doi.org/10.2312/SCA/SCA08/057-066","ieee":"B. Bickel, M. Lang, M. Botsch, M. Otaduy, and M. Gross, “Pose-space animation and transfer of facial details,” presented at the SIGGRAPH: Eurographics Symposium on Computer Animation, 2008, pp. 57–66.","short":"B. Bickel, M. Lang, M. Botsch, M. Otaduy, M. Gross, in:, ACM, 2008, pp. 57–66."},"date_updated":"2021-01-12T06:55:10Z","title":"Pose-space animation and transfer of facial details","author":[{"full_name":"Bickel, Bernd","orcid":"0000-0001-6511-9385","last_name":"Bickel","first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Lang, Manuel","last_name":"Lang","first_name":"Manuel"},{"first_name":"Mario","last_name":"Botsch","full_name":"Botsch, Mario"},{"full_name":"Otaduy, Miguel","last_name":"Otaduy","first_name":"Miguel"},{"full_name":"Gross, Markus","last_name":"Gross","first_name":"Markus"}],"publist_id":"4960"},{"title":"Multi scale capture of facial geometry and motion","publist_id":"4942","author":[{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel"},{"first_name":"Mario","full_name":"Botsch, Mario","last_name":"Botsch"},{"first_name":"Roland","last_name":"Angst","full_name":"Angst, Roland"},{"last_name":"Matusik","full_name":"Matusik, Wojciech","first_name":"Wojciech"},{"first_name":"Miguel","full_name":"Otaduy, Miguel A","last_name":"Otaduy"},{"last_name":"Pfister","full_name":"Pfister, Hanspeter","first_name":"Hanspeter"},{"first_name":"Markus","full_name":"Groß, Markus S","last_name":"Groß"}],"extern":1,"date_updated":"2021-01-12T06:55:15Z","citation":{"chicago":"Bickel, Bernd, Mario Botsch, Roland Angst, Wojciech Matusik, Miguel Otaduy, Hanspeter Pfister, and Markus Groß. “Multi Scale Capture of Facial Geometry and Motion.” ACM, 2007. https://doi.org/doi:10.1145/1275808.1276419.","ista":"Bickel B, Botsch M, Angst R, Matusik W, Otaduy M, Pfister H, Groß M. 2007. Multi scale capture of facial geometry and motion. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques.","mla":"Bickel, Bernd, et al. Multi Scale Capture of Facial Geometry and Motion. ACM, 2007, doi:doi:10.1145/1275808.1276419.","apa":"Bickel, B., Botsch, M., Angst, R., Matusik, W., Otaduy, M., Pfister, H., & Groß, M. (2007). Multi scale capture of facial geometry and motion. Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, ACM. https://doi.org/doi:10.1145/1275808.1276419","ama":"Bickel B, Botsch M, Angst R, et al. Multi scale capture of facial geometry and motion. In: ACM; 2007. doi:doi:10.1145/1275808.1276419","ieee":"B. Bickel et al., “Multi scale capture of facial geometry and motion,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, 2007.","short":"B. Bickel, M. Botsch, R. Angst, W. Matusik, M. Otaduy, H. Pfister, M. Groß, in:, ACM, 2007."},"status":"public","conference":{"name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques"},"type":"conference","_id":"2091","date_created":"2018-12-11T11:55:39Z","date_published":"2007-01-01T00:00:00Z","doi":"doi:10.1145/1275808.1276419","day":"01","year":"2007","publication_status":"published","month":"01","main_file_link":[{"url":"http://nrs.harvard.edu/urn-3:HUL.InstRepos:4726184","open_access":"1"}],"oa":1,"quality_controlled":0,"publisher":"ACM","acknowledgement":"This research has been supported by the NCCR Co-Me of the Swiss National Science Foundation.","abstract":[{"lang":"eng","text":"We present a novel multi-scale representation and acquisition method for the animation of high-resolution facial geometry and wrinkles. We first acquire a static scan of the face including reflectance data at the highest possible quality. We then augment a traditional marker-based facial motion-capture system by two synchronized video cameras to track expression wrinkles. The resulting model consists of high-resolution geometry, motion-capture data, and expression wrinkles in 2D parametric form. This combination represents the facial shape and its salient features at multiple scales. During motion synthesis the motion-capture data deforms the high-resolution geometry using a linear shell-based mesh-deformation method. The wrinkle geometry is added to the facial base mesh using nonlinear energy optimization. We present the results of our approach for performance replay as well as for wrinkle editing. "}]},{"status":"public","type":"journal_article","_id":"2093","title":"Multi scale capture of facial geometry and motion","author":[{"id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd","full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","last_name":"Bickel"},{"last_name":"Botsch","full_name":"Botsch, Mario","first_name":"Mario"},{"full_name":"Angst, Roland","last_name":"Angst","first_name":"Roland"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"},{"first_name":"Miguel","last_name":"Otaduy","full_name":"Otaduy, Miguel A"},{"full_name":"Pfister, Hanspeter","last_name":"Pfister","first_name":"Hanspeter"},{"first_name":"Markus","last_name":"Groß","full_name":"Groß, Markus S"}],"publist_id":"4944","extern":1,"citation":{"short":"B. Bickel, M. Botsch, R. Angst, W. Matusik, M. Otaduy, H. Pfister, M. Groß, ACM Transactions on Graphics 26 (2007).","ieee":"B. Bickel et al., “Multi scale capture of facial geometry and motion,” ACM Transactions on Graphics, vol. 26, no. 3. ACM, 2007.","ama":"Bickel B, Botsch M, Angst R, et al. Multi scale capture of facial geometry and motion. ACM Transactions on Graphics. 2007;26(3). doi:10.1145/1276377.1276419","apa":"Bickel, B., Botsch, M., Angst, R., Matusik, W., Otaduy, M., Pfister, H., & Groß, M. (2007). Multi scale capture of facial geometry and motion. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/1276377.1276419","mla":"Bickel, Bernd, et al. “Multi Scale Capture of Facial Geometry and Motion.” ACM Transactions on Graphics, vol. 26, no. 3, ACM, 2007, doi:10.1145/1276377.1276419.","ista":"Bickel B, Botsch M, Angst R, Matusik W, Otaduy M, Pfister H, Groß M. 2007. Multi scale capture of facial geometry and motion. ACM Transactions on Graphics. 26(3).","chicago":"Bickel, Bernd, Mario Botsch, Roland Angst, Wojciech Matusik, Miguel Otaduy, Hanspeter Pfister, and Markus Groß. “Multi Scale Capture of Facial Geometry and Motion.” ACM Transactions on Graphics. ACM, 2007. https://doi.org/10.1145/1276377.1276419."},"date_updated":"2021-01-12T06:55:15Z","intvolume":" 26","month":"01","oa":1,"main_file_link":[{"url":"http://nrs.harvard.edu/urn-3:HUL.InstRepos:4726184","open_access":"1"}],"publisher":"ACM","quality_controlled":0,"acknowledgement":"This research has been supported by the NCCR Co-Me of the Swiss National Science Foundation","abstract":[{"lang":"eng","text":"We present a novel multi-scale representation and acquisition method for the animation of high-resolution facial geometry and wrinkles. We first acquire a static scan of the face including reflectance data at the highest possible quality. We then augment a traditional marker-based facial motion-capture system by two synchronized video cameras to track expression wrinkles. The resulting model consists of high-resolution geometry, motion-capture data, and expression wrinkles in 2D parametric form. This combination represents the facial shape and its salient features at multiple scales. During motion synthesis the motion-capture data deforms the high-resolution geometry using a linear shell-based mesh-deformation method. The wrinkle geometry is added to the facial base mesh using nonlinear energy optimization. We present the results of our approach for performance replay as well as for wrinkle editing. "}],"date_created":"2018-12-11T11:55:40Z","date_published":"2007-01-01T00:00:00Z","doi":"10.1145/1276377.1276419","volume":26,"issue":"3","publication":"ACM Transactions on Graphics","day":"01","year":"2007","publication_status":"published"},{"_id":"2092","status":"public","type":"journal_article","extern":1,"citation":{"chicago":"Pietroni, Nico, Miguel Otaduy, Bernd Bickel, Fabio Ganovelli, and Markus Groß. “Texturing Internal Surfaces from a Few Cross-Sections.” Computer Graphics Forum. Wiley-Blackwell, 2007. https://doi.org/10.1111/j.1467-8659.2007.01087.x.","ista":"Pietroni N, Otaduy M, Bickel B, Ganovelli F, Groß M. 2007. Texturing internal surfaces from a few cross-sections. Computer Graphics Forum. 26(3), 637–644.","mla":"Pietroni, Nico, et al. “Texturing Internal Surfaces from a Few Cross-Sections.” Computer Graphics Forum, vol. 26, no. 3, Wiley-Blackwell, 2007, pp. 637–44, doi:10.1111/j.1467-8659.2007.01087.x.","ama":"Pietroni N, Otaduy M, Bickel B, Ganovelli F, Groß M. Texturing internal surfaces from a few cross-sections. Computer Graphics Forum. 2007;26(3):637-644. doi:10.1111/j.1467-8659.2007.01087.x","apa":"Pietroni, N., Otaduy, M., Bickel, B., Ganovelli, F., & Groß, M. (2007). Texturing internal surfaces from a few cross-sections. Computer Graphics Forum. Wiley-Blackwell. https://doi.org/10.1111/j.1467-8659.2007.01087.x","ieee":"N. Pietroni, M. Otaduy, B. Bickel, F. Ganovelli, and M. Groß, “Texturing internal surfaces from a few cross-sections,” Computer Graphics Forum, vol. 26, no. 3. Wiley-Blackwell, pp. 637–644, 2007.","short":"N. Pietroni, M. Otaduy, B. Bickel, F. Ganovelli, M. Groß, Computer Graphics Forum 26 (2007) 637–644."},"date_updated":"2021-01-12T06:55:15Z","title":"Texturing internal surfaces from a few cross-sections","author":[{"full_name":"Pietroni, Nico","last_name":"Pietroni","first_name":"Nico"},{"last_name":"Otaduy","full_name":"Otaduy, Miguel A","first_name":"Miguel"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel"},{"full_name":"Ganovelli, Fabio","last_name":"Ganovelli","first_name":"Fabio"},{"first_name":"Markus","full_name":"Groß, Markus S","last_name":"Groß"}],"publist_id":"4943","acknowledgement":"This research was supported in part by the NCCR Co-Me of the Swiss National Science Foundation. ","abstract":[{"lang":"eng","text":"We introduce a new appearance-modeling paradigm for synthesizing the internal structure of a 3D model from photographs of a few cross-sections of a real object. When the internal surfaces of the 3D model are revealed as it is cut, carved, or simply clipped, we synthesize their texture from the input photographs. Our texture synthesis algorithm is best classified as a morphing technique, which efficiently outputs the texture attributes of each surface point on demand. For determining source points and their weights in the morphing algorithm, we propose an interpolation domain based on BSP trees that naturally resembles planar splitting of real objects. In the context of the interpolation domain, we define efficient warping and morphing operations that allow for real-time synthesis of textures. Overall, our modeling paradigm, together with its realization through our texture morphing algorithm, allow users to author 3D models that reveal highly realistic internal surfaces in a variety of artistic flavors."}],"intvolume":" 26","month":"09","publisher":"Wiley-Blackwell","quality_controlled":0,"publication":"Computer Graphics Forum","day":"01","publication_status":"published","year":"2007","date_created":"2018-12-11T11:55:39Z","volume":26,"date_published":"2007-09-01T00:00:00Z","doi":"10.1111/j.1467-8659.2007.01087.x","issue":"3","page":"637 - 644"},{"date_created":"2018-12-11T11:55:34Z","date_published":"2006-11-01T00:00:00Z","day":"01","publication_status":"published","year":"2006","month":"11","quality_controlled":0,"publisher":"IOS Press","abstract":[{"lang":"eng","text":"We present an adaptive animation method for electrical discharges. Electrical discharges can be simulated using the dielectric breakdown model. Regular discretization of the governing Laplace equation leads to huge equation systems, and the computational cost of solving the equations quickly becomes prohibitive at high resolutions, especially for simulations in 3D. In contrast, our method discretizes the Laplace equation on an adaptive octree, reducing the size of the problem significantly, and making simulations of high resolution 3D datasets and even 3D animations feasible. In order to enhance realism for lightning animations, we propose a particle simulation that animates the residual positive charge. Thus, interaction of electrical discharges with their surroundings\ncan be simulated."}],"title":"Adaptive simulation of electrical discharges","author":[{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","last_name":"Bickel"},{"last_name":"Wicke","full_name":"Wicke, Martin","first_name":"Martin"},{"last_name":"Gross","full_name":"Gross, Markus","first_name":"Markus"}],"publist_id":"4961","extern":1,"date_updated":"2021-01-12T06:55:09Z","citation":{"ieee":"B. Bickel, M. Wicke, and M. Gross, “Adaptive simulation of electrical discharges,” presented at the VMV: Vision, Modeling, and Visualization, 2006.","short":"B. Bickel, M. Wicke, M. Gross, in:, IOS Press, 2006.","apa":"Bickel, B., Wicke, M., & Gross, M. (2006). Adaptive simulation of electrical discharges. Presented at the VMV: Vision, Modeling, and Visualization, IOS Press.","ama":"Bickel B, Wicke M, Gross M. Adaptive simulation of electrical discharges. In: IOS Press; 2006.","mla":"Bickel, Bernd, et al. Adaptive Simulation of Electrical Discharges. IOS Press, 2006.","ista":"Bickel B, Wicke M, Gross M. 2006. Adaptive simulation of electrical discharges. VMV: Vision, Modeling, and Visualization.","chicago":"Bickel, Bernd, Martin Wicke, and Markus Gross. “Adaptive Simulation of Electrical Discharges.” IOS Press, 2006."},"status":"public","conference":{"name":"VMV: Vision, Modeling, and Visualization"},"type":"conference","_id":"2077"},{"acknowledgement":"Henrik Wann Jensen and Craig Donner were supported by a Sloan Fellowship and the National Science Foundation under Grant No. 0305399. ","abstract":[{"text":"We have measured 3D face geometry, skin reflectance, and subsurface scattering using custom-built devices for 149 subjects of varying age, gender, and race. We developed a novel skin reflectance model whose parameters can be estimated from measurements. The model decomposes the large amount of measured skin data into a spatially-varying analytic BRDF, a diffuse albedo map, and diffuse subsurface scattering. Our model is intuitive, physically plausible, and - since we do not use the original measured data - easy to edit as well. High-quality renderings come close to reproducing real photographs. The analysis of the model parameters for our sample population reveals variations according to subject age, gender, skin type, and external factors (e.g., sweat, cold, or makeup). Using our statistics, a user can edit the overall appearance of a face (e.g., changing skin type and age) or change small-scale features using texture synthesis (e.g., adding moles and freckles). We are making the collected statistics publicly available to the research community for applications in face synthesis and analysis.","lang":"eng"}],"intvolume":" 25","month":"07","publisher":"ACM","quality_controlled":0,"publication":"ACM Transactions on Graphics","day":"31","year":"2006","publication_status":"published","date_created":"2018-12-11T11:55:38Z","volume":25,"issue":"3","doi":"10.1145/1141911.1141987","date_published":"2006-07-31T00:00:00Z","page":"1013 - 1024","_id":"2089","status":"public","type":"journal_article","extern":1,"date_updated":"2021-01-12T06:55:14Z","citation":{"ista":"Weyrich T, Matusik W, Pfister H, Bickel B, Donner C, Tu C, Mcandless J, Lee J, Ngan A, Jensen H, Groß M. 2006. Analysis of human faces using a measurement-based skin reflectance model. ACM Transactions on Graphics. 25(3), 1013–1024.","chicago":"Weyrich, Tim, Wojciech Matusik, Hanspeter Pfister, Bernd Bickel, Craig Donner, Chien Tu, Janet Mcandless, et al. “Analysis of Human Faces Using a Measurement-Based Skin Reflectance Model.” ACM Transactions on Graphics. ACM, 2006. https://doi.org/10.1145/1141911.1141987.","short":"T. Weyrich, W. Matusik, H. Pfister, B. Bickel, C. Donner, C. Tu, J. Mcandless, J. Lee, A. Ngan, H. Jensen, M. Groß, ACM Transactions on Graphics 25 (2006) 1013–1024.","ieee":"T. Weyrich et al., “Analysis of human faces using a measurement-based skin reflectance model,” ACM Transactions on Graphics, vol. 25, no. 3. ACM, pp. 1013–1024, 2006.","ama":"Weyrich T, Matusik W, Pfister H, et al. Analysis of human faces using a measurement-based skin reflectance model. ACM Transactions on Graphics. 2006;25(3):1013-1024. doi:10.1145/1141911.1141987","apa":"Weyrich, T., Matusik, W., Pfister, H., Bickel, B., Donner, C., Tu, C., … Groß, M. (2006). Analysis of human faces using a measurement-based skin reflectance model. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/1141911.1141987","mla":"Weyrich, Tim, et al. “Analysis of Human Faces Using a Measurement-Based Skin Reflectance Model.” ACM Transactions on Graphics, vol. 25, no. 3, ACM, 2006, pp. 1013–24, doi:10.1145/1141911.1141987."},"title":"Analysis of human faces using a measurement-based skin reflectance model","publist_id":"4946","author":[{"first_name":"Tim","full_name":"Weyrich, Tim","last_name":"Weyrich"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"},{"last_name":"Pfister","full_name":"Pfister, Hanspeter","first_name":"Hanspeter"},{"last_name":"Bickel","full_name":"Bernd Bickel","orcid":"0000-0001-6511-9385","id":"49876194-F248-11E8-B48F-1D18A9856A87","first_name":"Bernd"},{"first_name":"Craig","last_name":"Donner","full_name":"Donner, Craig"},{"full_name":"Tu, Chien","last_name":"Tu","first_name":"Chien"},{"last_name":"Mcandless","full_name":"McAndless, Janet M","first_name":"Janet"},{"first_name":"Jinho","last_name":"Lee","full_name":"Lee, Jinho"},{"last_name":"Ngan","full_name":"Ngan, Addy","first_name":"Addy"},{"first_name":"Henrik","last_name":"Jensen","full_name":"Jensen, Henrik W"},{"last_name":"Groß","full_name":"Groß, Markus S","first_name":"Markus"}]},{"date_updated":"2021-01-12T06:55:14Z","citation":{"ama":"Weyrich T, Matusik W, Pfister H, et al. Analysis of human faces using a measurement-based skin reflectance model. In: ACM; 2006:1013-1024. doi:10.1145/1179352.1141987","apa":"Weyrich, T., Matusik, W., Pfister, H., Bickel, B., Donner, C., Tu, C., … Groß, M. (2006). Analysis of human faces using a measurement-based skin reflectance model (pp. 1013–1024). Presented at the ACM SIGGRAPH, ACM. https://doi.org/10.1145/1179352.1141987","ieee":"T. Weyrich et al., “Analysis of human faces using a measurement-based skin reflectance model,” presented at the ACM SIGGRAPH, 2006, pp. 1013–1024.","short":"T. Weyrich, W. Matusik, H. Pfister, B. Bickel, C. Donner, C. Tu, J. Mcandless, J. Lee, A. Ngan, H. Jensen, M. Groß, in:, ACM, 2006, pp. 1013–1024.","mla":"Weyrich, Tim, et al. Analysis of Human Faces Using a Measurement-Based Skin Reflectance Model. ACM, 2006, pp. 1013–24, doi:10.1145/1179352.1141987.","ista":"Weyrich T, Matusik W, Pfister H, Bickel B, Donner C, Tu C, Mcandless J, Lee J, Ngan A, Jensen H, Groß M. 2006. Analysis of human faces using a measurement-based skin reflectance model. ACM SIGGRAPH, 1013–1024.","chicago":"Weyrich, Tim, Wojciech Matusik, Hanspeter Pfister, Bernd Bickel, Craig Donner, Chien Tu, Janet Mcandless, et al. “Analysis of Human Faces Using a Measurement-Based Skin Reflectance Model,” 1013–24. ACM, 2006. https://doi.org/10.1145/1179352.1141987."},"extern":1,"author":[{"first_name":"Tim","last_name":"Weyrich","full_name":"Weyrich, Tim"},{"first_name":"Wojciech","last_name":"Matusik","full_name":"Matusik, Wojciech"},{"first_name":"Hanspeter","last_name":"Pfister","full_name":"Pfister, Hanspeter"},{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel"},{"first_name":"Craig","full_name":"Donner, Craig","last_name":"Donner"},{"first_name":"Chien","full_name":"Tu, Chien","last_name":"Tu"},{"full_name":"McAndless, Janet M","last_name":"Mcandless","first_name":"Janet"},{"last_name":"Lee","full_name":"Lee, Jinho","first_name":"Jinho"},{"full_name":"Ngan, Addy","last_name":"Ngan","first_name":"Addy"},{"full_name":"Jensen, Henrik W","last_name":"Jensen","first_name":"Henrik"},{"last_name":"Groß","full_name":"Groß, Markus S","first_name":"Markus"}],"publist_id":"4947","title":"Analysis of human faces using a measurement-based skin reflectance model","_id":"2088","type":"conference","conference":{"name":"ACM SIGGRAPH"},"status":"public","year":"2006","publication_status":"published","day":"31","page":"1013 - 1024","doi":"10.1145/1179352.1141987","date_published":"2006-07-31T00:00:00Z","date_created":"2018-12-11T11:55:38Z","abstract":[{"lang":"eng","text":"We have measured 3D face geometry, skin reflectance, and subsurface scattering using custom-built devices for 149 subjects of varying age, gender, and race. We developed a novel skin reflectance model whose parameters can be estimated from measurements. The model decomposes the large amount of measured skin data into a spatially-varying analytic BRDF, a diffuse albedo map, and diffuse subsurface scattering. Our model is intuitive, physically plausible, and - since we do not use the original measured data - easy to edit as well. High-quality renderings come close to reproducing real photographs. The analysis of the model parameters for our sample population reveals variations according to subject age, gender, skin type, and external factors (e.g., sweat, cold, or makeup). Using our statistics, a user can edit the overall appearance of a face (e.g., changing skin type and age) or change small-scale features using texture synthesis (e.g., adding moles and freckles). We are making the collected statistics publicly available to the research community for applications in face synthesis and analysis. "}],"acknowledgement":"Henrik Wann Jensen and Craig Donner were supported by a Sloan Fellowship and the National Science Foundation under Grant No. 0305399.","publisher":"ACM","quality_controlled":0,"month":"07"},{"conference":{"name":"SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques"},"type":"conference","status":"public","_id":"2090","author":[{"first_name":"Bernd","id":"49876194-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-6511-9385","full_name":"Bernd Bickel","last_name":"Bickel"},{"last_name":"Weyrich","full_name":"Weyrich, Tim","first_name":"Tim"},{"full_name":"Matusik, Wojciech","last_name":"Matusik","first_name":"Wojciech"},{"last_name":"Pfister","full_name":"Pfister, Hanspeter","first_name":"Hanspeter"},{"last_name":"Donner","full_name":"Donner, Craig","first_name":"Craig"},{"first_name":"Chien","last_name":"Tu","full_name":"Tu, Chien"},{"first_name":"Janet","full_name":"McAndless, Janet M","last_name":"Mcandless"},{"first_name":"Jinho","last_name":"Lee","full_name":"Lee, Jinho"},{"first_name":"Addy","full_name":"Ngan, Addy","last_name":"Ngan"},{"full_name":"Jensen, Henrik W","last_name":"Jensen","first_name":"Henrik"},{"full_name":"Groß, Markus S","last_name":"Groß","first_name":"Markus"}],"publist_id":"4945","title":"Processing and editing of faces using a measurement-based skin reflectance model","citation":{"ista":"Bickel B, Weyrich T, Matusik W, Pfister H, Donner C, Tu C, Mcandless J, Lee J, Ngan A, Jensen H, Groß M. 2006. Processing and editing of faces using a measurement-based skin reflectance model. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques.","chicago":"Bickel, Bernd, Tim Weyrich, Wojciech Matusik, Hanspeter Pfister, Craig Donner, Chien Tu, Janet Mcandless, et al. “Processing and Editing of Faces Using a Measurement-Based Skin Reflectance Model.” ACM, 2006. https://doi.org/10.1145/1179849.1180059.","short":"B. Bickel, T. Weyrich, W. Matusik, H. Pfister, C. Donner, C. Tu, J. Mcandless, J. Lee, A. Ngan, H. Jensen, M. Groß, in:, ACM, 2006.","ieee":"B. Bickel et al., “Processing and editing of faces using a measurement-based skin reflectance model,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, 2006.","apa":"Bickel, B., Weyrich, T., Matusik, W., Pfister, H., Donner, C., Tu, C., … Groß, M. (2006). Processing and editing of faces using a measurement-based skin reflectance model. Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques, ACM. https://doi.org/10.1145/1179849.1180059","ama":"Bickel B, Weyrich T, Matusik W, et al. Processing and editing of faces using a measurement-based skin reflectance model. In: ACM; 2006. doi:10.1145/1179849.1180059","mla":"Bickel, Bernd, et al. Processing and Editing of Faces Using a Measurement-Based Skin Reflectance Model. ACM, 2006, doi:10.1145/1179849.1180059."},"date_updated":"2021-01-12T06:55:15Z","extern":1,"quality_controlled":0,"publisher":"ACM","month":"07","date_created":"2018-12-11T11:55:39Z","date_published":"2006-07-01T00:00:00Z","doi":"10.1145/1179849.1180059","year":"2006","publication_status":"published","day":"01"}]