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EUROGRAPHICS 2021

Vienna, Austria May 3 – 7, 2021

Organized by

EUROGRAPHICS THEEUROPEANASSOCIATION

FORCOMPUTERGRAPHICS

TU WIEN

RESEARCHUNIT OF

COMPUTERGRAPHICS

Full Papers Chairs

Niloy Mitra, University College London (UCL), UK Ivan Viola, KAUST, Saudi Arabia

Conference Chairs

Werner Purgathofer, TU Wien, Austria Markus Gross, ETH Zurich, Switzerland

DOI: 10.1111/cgf.142657 https://www.eg.org https://diglib.eg.org

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Organizing Committee

STARs Chairs

Katja Bühler, VRVis Research Center, Vienna, Austria Holly Rushmeier, Yale University, USA

Tutorials Chairs

Carol O’Sullivan, Trinity College Dublin, Ireland Dieter Schmalstieg, TU Graz, Austria

Short Papers Chairs

Holger Theisel, University of Magdeburg, Germany Michael Wimmer, TU Wien, Austria

Education Papers Chairs

Gitta Domik, Paderborn University, Germany Beatriz Sousa Santos, University of Aveiro, Portugal

Posters Chairs

Jiˇrí Bittner, TU Prague, Czech Republic Manuela Waldner, TU Wien, Austria

Industrial Chair

Gerd Hesina, VRVis Research Center, Vienna, Austria Doctoral Consortium Chairs

László Szirmay-Kalos, TU Budapest, Hungary Hsiang-Yun Wu, TU Wien, Austria

Projects and Labs Chairs Ursula Augsdörfer, TU Graz, Austria

Reinhold Preiner, TU Graz, Austria

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Platinum Sponsors

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Gold Sponsors

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Silver Sponsors

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Bronze Sponsors

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Preface

This issue of the Computer Graphics Forum contains the technical full papers program of the Eurographics Association 42nd annual conference, held (virtually) from Vienna, Austria from 3-7 May 2021. The Eurographics annual venue presents a unique opportunity to present outstanding technical contributions in computer graphics. The full papers selected for publication in the Computer Graphics Forum journal are arguably the most prestigious feature of the conference.

The technical paper selection process involved a group of 67 experts forming the International Program Committee (IPC). We received a total of 129 full submissions. A sorting committee, consisting of the two Co-Chairs and five advisory board members (Jan Kautz, Sylvain Lefebvre, Belen Masia, Daniele Panozzo, Michael Wimmer), subsequently assigned each paper to two IPC members, as either primary or secondary reviewer, up to five papers, respecting to their preferences, expertise, conflicts, and automatically computed matching scores between IPC members and submitted papers.

After the initial five reviews per submission were collected, the authors had five days to consult these reviews and write a 1000-word rebuttal, addressing key questions and potential misinterpretations. Finally, all reviewers assigned to a paper read the rebuttal and all reviews and together reached an initial decision.

This year, following an established tradition that started in 2012 and improved continuously through the years, we replaced the traditional in-person IPC meeting with a one-week virtual asynchronous meeting where the discussions between the IPC members leading to the final decisions were performed off-line by a bulletin board and other means of personal communication.

This led to extensive discussions where papers and reviews were debated extensively involving other IPC members as extra readers when needed. Each paper had a public discussion board, and each and every IPC member contributed to discussions where they felt competent.

All papers conditionally accepted with minor revisions went through a short second review cycle, with evaluations from the primary reviewer, and sometimes the secondary reviewer, before being finally accepted. In the end, 47 papers out of the 129 full submissions were accepted with minor revisions for a 36% acceptance rate, while 3 were recommended to a fast-track review process with major revisions to be considered for publication in a future issue of Computer Graphics Forum. This year we had papers on a diverse range of topics including geometry, analysis exploration of images, RGBD scans, and videos, rendering, generative modeling, computational fabrication, pose manifolds, material acquisition, shape analysis, physical simulations, flow visualization, skinning and deformation, and expressive modeling.

All accepted full papers are published as open-access Computer Graphics Forum journal papers. It is worth noting that for all submissions conflict-of-interest was managed on all levels, from reviewers, committee, advisory board, best paper committee, up to the chairs. The review process was double-blind and in case the original set of reviewers did not conclude with a decision, additional reviewers were invited to perform a full review and assist the decision process. Best papers were selected by a dedicated awards committee who selected among the top 12 papers based on overall review scores.

We would like to thank everyone who made this possible. First and foremost, we are grateful to all the members of the IPC who dedicated a remarkable amount of their time to finding tertiaries, reviewing and discussing papers, and subsequently shepherded the accepted papers undergoing the minor revision cycle. We wish to thank all the reviewers, who provided 664 high-quality and thoughtful reviews and, of course, all the authors for their efforts in preparing and revising the submitted papers. We are especially grateful to Michael Wimmer who shared with us the insights from previous years and was indefatigable with his help and assistance. We would like to express strong appreciation to the advisory board for their support with paper sorting.

Last but not least, we would like to thank Stefanie Behnke from Eurographics Publishing for her outstanding support with SRM functionality for her responsiveness which was the key to the successful outcome of the paper selection process. We are particularly proud of the effort having had to work around challenges imposed by the pandemic and the recurring lockdowns surrounding that.

We are very happy to present the full paper proceedings of Eurographics 2021. We believe that these papers reflect the best of extraordinary computer graphics research. It was both an honor and a pleasure for us to lead this selection process and we hope that you will find both the articles and the entire conference thought-provoking and inspiring of your future endeavors.

Ivan Viola and Niloy J. Mitra EG 21 Full Papers Co-Chairs

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Full Papers Advisory Board

Kautz, Jan NVidia, USA Lefebvre, Sylvain

Inria Nancy Grand-Est, France Masia, Belen

University of Zaragoza, Spain Panozzo, Daniele

NYU, USA Wimmer, Michael TU Wien, Austria

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International Programme Committee

Aittala, Miika

Nvidia Helsinki, Finland Aliaga, Daniel

Purdue University, USA Attene, Marco

CNR, Italy

Bærentzen, Jakob Andreas DTU, Denmark

Bickel, Bernd IST Austria, Austria Billeter, Markus TU Delft, Netherlands Birsak, Michael KAUST, Saudi Arabia Bommes, David

RWTH Aachen, Germany Botsch, Mario

Bielefeld University, Germany Boubekeur, Tamy

Telecom ParisTech, France Ceylan, Duygu

Adobe Research, United States Dachsbacher, Carsten

Karlsruhe Institute of Technology, Germany Digne, Julie

CNRS, France Doggett, Michael Lund University, Sweden Dong, Yue

MSRA, China Dumas, Jeremie nTopology, United States Eisemann, Elmar

Delft University of Technology, Netherlands Fu, Hongbo

City University of Hong Kong, Hong Kong Gao, Xifeng

Florida State University, United States Ghosh, Abhijeet

Imperial College London, UK

Guennebaud, Gael Inria Sud-Ouest, France Guérin, Eric

LIRIS Lyon, France Günther, Tobias

FAU Erlangen-Nürnberg, Germany Hildebrandt, Klaus

TU Delft, Netherlands Hu, Ruizhen

Shenzhen University, China Ju, Tao

Washington University in St. Louis, USA Kalogerakis, Evangelos

U Massachusetts, USA Komura, Taku

University of Edinburgh, UK Koyama, Yuki

National Institute of Advanced Industrial Science and Technology, Japan

Lavoué, Guillaume INSA Lyon, France Lawonn, Kai

University of Jena, Germany Levin, David

University of Toronto, United States Li, Dingzeyu

Adobe, USA Liu, Ligang USTC, China Martinez, Jonas INRIA, France Matkovic, Kresimir VRVis Research, Austria McDonnell, Rachel

Trinity College Dublin, Ireland Mellado, Nicholas

CNRS, France Memari, Pooran

Ecole Polytechnique, France

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International Programme Committee

Melzi, Simone

Sapienza University of Rome, Italy Musialski, Przemyslaw

New Jersey Institute of Technology, USA Ohrhallinger, Stefan

TU Wien, Austria Ovsjanikov, Maks

Ecole Polytechnique, France Panetta, Julian

University of California, Davis Pietroni, Nico

Sydney University, Australia Poranne, Roi

University of Haifa, Israel Ritchie, Daniel

Brown University, United States Rodolà, Emanuele

University of Rome, Italy Rushmeier, Holly Yale University, USA Schneider, Teseo

New York University, United States Schudeiske, Johannes

Weta Digital, New Zealand

Serrano, Ana

MPI Informatik, Germany Sintorn, Erik

Chalmers University, Sweden Skouras, Melina

MIT, USA

Sousa Santos, Beatriz University of Aveiro, Portugal Steinberger, Markus

Graz University of Technology, Austria Thies, Justus

Technical University of Munich, Germany Tong, Yiying

Michigan State University, USA Umetani, Nobuyuki

University of Tokyo, Japan Wojtan, Chris

IST Austria, Austria Wu, Shihao

ETH Zurich, Switzerland Xu, Kevin Kai

National University of Defense Technology, China Zhang, Hao (Richard)

SFU, Canada

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Reviewers

Aberman, Kfir Achlioptas, Panos Alla Chaitanya, Ch. R.

Alliez, Pierre Amenta, Annamaria Assarsson, Ulf Audebert, Nicolas Baecher, Moritz Bailey, Stephen Bang, Seungbae Banterle, Francesco Barla, Pascal Barthe, Loïc Bavoil, Louis Beeler, Thabo Bender, Jan Bernard, Florian Biasotti, Silvia Bieron, James Bitterli, Benedikt Bittner, Jiˇrí Bo, Pengbo Bohak, Ciril Bolkart, Timo Boltcheva, Dobrina Bonneel, Nicolas Bönsch, Andrea Bruckner, Stefan Brunton, Alan Budninskiy, Max Campen, Marcel Canabal, José Carmo, Maria Beatriz Cavoretto, Roberto Chaine, Raphaelle Chaudhuri, Siddhartha Chen, Guoning Chen, Rui Chen, Yanyun Chen, Yutian

Chentanez, Nuttapong Cherchi, Gianmarco Clarberg, Petrik Colas, Francis Corman, Etienne Crassin, Cyril Demir, Ilke Denitto, Matteo Deschaintre, Valentin Didyk, Piotr

Diehl, Alexandra Dutra, Teofilo Eckert, Marie-Lena Eilertsen, Gabriel Elgharib, Mohamed Elshehaly, Mai Engelke, Wito Erleben, Kenny Faloutsos, Petros Fang, Lu Fang, Xianzhong Felle Olsen, Tim Femiani, John Fernandes, Leandro Ferwerda, James Franke, Linus Friston, Sebastian Froehlich, Bernd Fu, Chi-Wing Fu, Dan Fu, Qiang Fu, Xiao-Ming Fuchs, Johannes Fukiage, Taiki Gafar, Abdallah Gal, Rinon Galerne, Bruno Gao, Lin Gargallo, Abel Gersthofer, Lukas Gilet, Guillaume Gingold, Yotam Goldade, Ryan Gonçalves, Daniel Gotardo, Paulo Gracanin, Denis Grosch, Thorsten Gruson, Adrien Gryaditskaya, Yulia Guarnera, Giuseppe C.

Guerrero, Paul Günther, Tobias Guo, Jie Guo, Yu Guthe, Stefan Guy, Stephen Ha, Sehoon Hachisuka, Toshiya Hadwiger, Markus Han, Daseong

Han, Songfang Hannemose, Morten Hanocka, Rana Hansard, Miles Harvey, Felix Hasan, Milos Hedman, Peter Heitz, Eric Herholz, Philipp Herholz, Sebastian Hétroy-Wheeler, Franck Holzschuch, Nicolas Hormann, Kai Hoyet, Ludovic Hu, Shanfeng Hu, Yixin Huang, Haibin Huang, Ruqi Huang, Shi-Sheng Hui, Zhuo

Iarussi, Emmanuel Isenberg, Tobias Iwai, Daisuke Jacobson, Alec Jang, Yun Jarabo, Adrián Jeon, Daniel S.

Jung, Alisa

Kanamori, Yoshihiro Kang, Suk-Ju Karimov, Alexey Kazhdan, Misha Keeter, Matt Kellnhofer, Petr Kern, Michael Keshavarz, Behrang Khademi Kalantari, Nima Kim, Byungmoon Kim, Dahun Kim, Theodore Kocabas, Muhammed Kolkin, Nicholas

Konakovi´c Lukovi´c, Mina Kovalsky, Shahar

Krishnamurthy, Vinayak Kubisch, Christoph Kwon, Taesoo Ladicky, Lubor Lagunas, Manuel Lai, Yu-Kun

Lattas, Alexandros Lee, Sungkil Lefevre, Sebastien Lehtinen, Jaakko Lei, Na

Lescoat, Thibault Levi, Zohar Lewis, J.P.

Li, Jiaman Li, Ruilong Li, Yijun Li, Zhengqin Liao, Jie Liao, Yiyi

Liesaputra, Veronica Lin, Daqi

Lin, Hongwei Lin, Sharon Litany, Or Liu, Chen

Liu, Hsueh-Ti Derek Liu, Libin

Liu, Wei Liu, Wenxi Liu, Xiaopei Liu, Xinguo Liu, Yang Liu, Yong-Jin Livesu, Marco Luan, Fujun Lüthi, Marcel Macklin, Miles Majumder, Aditi Mallett, Ian Malomo, Luigi Mandad, Manish Marin, Riccardo Markvorsen, Steen Martin-Brualla, Ricardo May, Chris

Mccann, Jim Mercier, Olivier Mitterreiter, Matthias Mlakar, Daniel Modi, Vismay Møller Jensen, Patrick Moreau, Pierre Mura, Claudio Myszkowski, Karol Nakada, Masaki

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Narain, Rahul Neff, Michael Neyret, Fabrice Novak, Jan

Ohrt Elingaard, Martin Oztireli, Cengiz Padmanaban, Nitish Palmer, David Pan, Zherong Para, Wamiq Patashnik, Or Peers, Pieter Perazzi, Federico Peters, Christoph Pham, Quang-Hieu Philip, Julien Pollard, Nancy Prantl, Lukas Preiner, Reinhold Puppo, Enrico Qi, Siyuan Qin, Yipeng Raad, Lara Ranon, Roberto Rapp, Tobias Reibold, Florian Remacle, Jean-Francois Richardt, Christian Ritschel, Tobias Riviere, Jérémy Robins, Vanessa Roessl, Christian Rousselle, Fabrice Sacht, Leonardo

Saito, Shunsuke Salvi, Marco Sander, Pedro Sassen, Josua Sauvage, Basile Schied, Christoph Schreck, Camille Schulz, Hans-Jörg Schumacher, Christian Schymura, Matthias Sharf, Andrei Shugrina, Maria Simonot, Lionel Sitzmann, Vincent Sloan, Peter-Pike Smith, Jesse Sohre, Nick

Solenthaler, Barbara Soler, Cyril

Solomon, Justin Song, Peng

Steinlechner, Harald Storrs, Katherine Sugano, Yusuke Sung, Minhyuk Sunkavalli, Kalyan Tan, Jianchao Tan, Tiow Seng Tang, Chengcheng Tang, Min Tao, Michael Tarini, Marco Ten Bosch, Marc Tewari, Ayush

Thuerey, Nils Tiwari, Garvita Tokuyoshi, Yusuke Tompkin, James Tricard, Thibault Tsai, Yi-Hsuan Tumas, Paulius Tung, Tony Um, Kiwon Umenhoffer, Tamás Usher, Will Van Kaick, Oliver Vanderhaeghe, David Vangorp, Peter Vanhoey, Kenneth Vasilakis, Andreas-A.

Vaxman, Amir Viertel, Ryan Walter, Bruce Wang, Beibei Wang, Tingwu Wang, Xinlei Wang, Yangang Wang, Yiqun Wei, Li-Yi

Weinmann, Michael Weiss, Tomer Won, Jungdam Wong, Tien-Tsin Wu, Hongzhi Wu, Jun Wu, Lifan Xiao, Chunxia Xin, Shiqing

Xin, Tong Xu, Feng Xu, Hongyi Xu, Kun Xu, Zexiang Xu, Zhan Yan, Ling-Qi Yang, Lei Yang, Zhou Yeh, Chih-Kuo Yi, Zili Yoon, Jae Shin Yoon, Youngwoo Yoshidas, Hironori Yu, Lap-Fai Zara, Jiri Zehnder, Jonas Zhang, Jiayi Eris Zhang, Xiaowei Zhang, Yinda Zhao, Haisen Zheng, Jianmin Zheng, Mianlun Zheng, Youyi Zhou, Qingnan Zhou, Yang Zhu, Bo Zhu, Chenyang Zhu, Jun-Yan Zordan, Victor Zou, Changqing

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Author Index

Ahn, Junghyun . . . 153

Alexa, Marc . . . 13

Alonso, Laurent . . . 1

Atanasov, Asen . . . 103

Aydin, Tunc O. . . 179

Azevedo, Vinicius C. . . 339

Babaei, Vahid . . . 205

Basselin, Justine . . . 1

Bénard, Pierre . . . 39

Bharaj, Gaurav . . . 153

Bickel, Bernd . . . 205

Bonneau, Georges-Pierre . . . . 291

Bonneel, Nicolas . . . 327

Born, Janis . . . 277

Bronstein, Michael M. . . 435

Campen, Marcel . . . 305

Cani, Marie-Paule . . . 549

Cavallo, Marco . . . 51

Ceylan, Duygu . . . 399

Chen, Baoquan . . . 127

Chen, Guoning . . . 461

Chen, Xuelin . . . 127

Cheng, Luyu . . . 461

Chevallier, Louis . . . 153

Cignoni, Paolo . . . 65

Cohen-Or, Daniel . . . 127

Cordonnier, Guillaume . . . 339

Cornillère, Victor . . . 449

Deussen, Oliver . . . 461

Dib, Abdallah . . . 153

Didyk, Piotr . . . 205

Dischler, Jean-Michel . . . 239

Döllner, Jürgen . . . 497

Farhat, Mohamed-Amine . . . 39

Farrugia, Jean-Philippe . . . 327

Fu, Chi-Wing . . . 461

Futschik, David . . . 563

Gagnon, Jonathan . . . 367

Garcia, Maxime . . . 39

Gastal, Eduardo S. L. . . 23

Georgiev, Iliyan . . . 231

Germano, Rafael L. . . 23

Gobbetti, Enrico . . . 191

Gosselin, Philippe . . . 153

Grittmann, Pascal . . . 231

Guan, Yanran . . . 115

Guo, Baining . . . 251

Guzman, Julián E. . . 367

Ha, Sehoon . . . 389

Hahmann, Stefanie . . . 291

Han, Honglei . . . 91

Hermosilla, Pedro . . . 413

Hladky, Jozef . . . 475

Höhlein, Kevin . . . 165

Isenberg, Tobias . . . 461

Jacobson, Alec . . . 13, 221 Jahan, Tansin . . . 115

Jeong, Moonsoo . . . 489

Jiang, Min . . . 91

Kaick, Oliver van . . . 115

Kalantari, Nima Khademi . . . . 315

Kalyanasundaram, Niranjan . . 549

Kanai, Takashi . . . 537

Kim, Doyeon . . . 265

Kim, Hyomin . . . 523

Kim, Jungeon . . . 523

Kobbelt, Leif . . . 277, 305 Koylazov, Vladimir . . . 103

Kˇrivánek, Jaroslav . . . 103, 205 Kuˇcera, Michal . . . 563

Kushner, Sarah . . . 221

Lavoué, Guillaume . . . 327

Lee, Gi Beom . . . 489

Lee, In-Kwon . . . 355

Lee, Seungyong . . . 523

Lee, Sung-Hee . . . 265

Lee, Sungkil . . . 489

Lefebvre, Sylvain . . . 1

Leonard, Ludwic . . . 165

Levin, David I. W. . . 221

Lévy, Bruno . . . 1

Li, Changjian . . . 511

Li, Tianxing . . . 537

Lian, Zhouhui . . . 141

Liu, C. Karen . . . 389

Liu, Hongli . . . 91

Liu, Hui . . . 461

Liu, Shiqiu . . . 79

Lu, Yucheng . . . 461

Lukáˇc, Mike . . . 563

Lutz, Nicolas . . . 239

Lyon, Max . . . 305

Ma, Li-Ke . . . 251

Maggioli, Filippo . . . 435

Maggiordomo, Andrea . . . 65

Marku, Johana . . . 291

Mayer, Maximilian . . . 497

Melzi, Simone . . . 435

Mestres, Nolan . . . 575

Mitra, Niloy J. 127, 375, 399, 511 Moshfeghifar, Faezeh . . . 549

Mould, David . . . 367

Muntoni, Alessandro . . . 191

Mura, Claudio . . . 375

Myszkowski, Karol . . . 205

Nam, Hyeonseo . . . 523

Nießner, Matthias . . . 511

Noûs, Camille . . . 39, 575 Nuvoli, Stefano . . . 191

Oh, Young Jin . . . 355

Oliveira, Manuel M. . . 23

Onzenoodt, Christian van . . . . 425

Ovsjanikov, Maks . . . 435

Pajarola, Renato . . . 375

Paquette, Eric . . . 367

Park, Jaesik . . . 523

Pasewaldt, Sebastian . . . 497

Pietroni, Nico . . . 191

Ray, Nicolas . . . 1

Reimann, Max . . . 497

Ritschel, Tobias . . . 425

Rittig, Tobias . . . 205

Rodolà, Emanuele . . . 435

Rohmer, Damien . . . 549

Romeo, Marco . . . 153

Ropinski, Timo . . . 413, 425 Sauvage, Basile . . . 239

Scateni, Riccardo . . . 191

Schelling, Michael . . . 413

Schindler, Konrad . . . 375

Schmidt, Patrick . . . 277

Seidel, Hans-Peter . . . 475

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Semmo, Amir . . . 497

Seok, Yechan . . . 489

Shechtman, Eli . . . 563

Shekhar, Sumit . . . 497

Shi, Rui . . . 537

Singh, Gurprit . . . 425

Singh, Karan . . . 221

Slusallek, Philipp . . . 231

Sokolov, Dmitry . . . 1

Solenthaler, Barbara . . . 339

Soler, Cyril . . . 327

Sorkine-Hornung, Olga . . . 449

Sorokin, Maks . . . 389

Steinberger, Markus . . . 475

Sumin, Denis . . . 205

Sýkora, Daniel . . . 563

Tang, Jingwei . . . 339

Tang, Shusen . . . 141

Tarini, Marco . . . 65, 549 Thébault, Cédric . . . 153

Thollot, Joëlle . . . 39, 575 Tola, Alessandro . . . 191

Tong, Xin . . . 251

Trapp, Matthias . . . 497

Ulinski, Risa . . . 221

Vázquez, Pere-Pau . . . 413

Vergne, Romain . . . 39, 575 Voloboy, Alexey . . . 205

Wang, Lu . . . 79

Wang, Tuanfeng . . . 399

Wang, Yunhai . . . 461

Wang, Zhaowen . . . 563

Westermann, Rüdiger . . . 165

Weyrich, Tim . . . 205

Wilkie, Alexander . . . 103, 205 Wolf, Thomas . . . 449

Wong, Yu-Shiang . . . 511

Yan, Ling-Qi . . . 79

Yang, Dongseok . . . 265

Yang, Jinglei . . . 79

Yang, Zeshi . . . 251

Yin, KangKang . . . 251

Yu, Wenhao . . . 389

Zeng, Zheng . . . 79

Zhang, Jiayi Eris . . . 13

Zhang, Meng . . . 399

Zhang, Yang . . . 179

Zhou, Xilong . . . 315

Zordan, Victor . . . 549

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TABLE OF CONTENTS Award Winners

Eurographics Outstanding Technical Contributions Award 2021 Paolo Cignoni

xix

Eurographics Young Researcher Award 2021 Tobias Günther

xx

Eurographics Young Researcher Award 2021 Adrián Jarabo

xxi

Geometry and Transformations

Restricted Power Diagrams on the GPU

Justine Basselin, Laurent Alonso, Nicolas Ray, Dmitry Sokolov, Sylvain Lefebvre, and Bruno Lévy

1

Fast Updates for Least-Squares Rotational Alignment Jiayi Eris Zhang, Alec Jacobson, and Marc Alexa

13

Navigating and Exploring Images and Videos Real-Time Frequency Adjustment of Images and Videos

Rafael L. Germano, Manuel M. Oliveira, and Eduardo S. L. Gastal

23

3D and Beyond

Coherent Mark-based Stylization of 3D Scenes at the Compositing Stage

Maxime Garcia, Romain Vergne, Mohamed-Amine Farhat, Pierre Bénard, Camille Noûs, and Joëlle Thollot

39

Higher Dimensional Graphics: Conceiving Worlds in Four Spatial Dimensions and Beyond Marco Cavallo

51

Texture Defragmentation for Photo-Reconstructed 3D Models Andrea Maggiordomo, Paolo Cignoni, and Marco Tarini

65

Rendering

Temporally Reliable Motion Vectors for Real-time Ray Tracing Zheng Zeng, Shiqiu Liu, Jinglei Yang, Lu Wang, and Ling-Qi Yan

79

Rank-1 Lattices for Efficient Path Integral Estimation Hongli Liu, Honglei Han, and Min Jiang

91

A Multiscale Microfacet Model Based on Inverse Bin Mapping

Asen Atanasov, Alexander Wilkie, Vladimir Koylazov, and Jaroslav Kˇrivánek

103

Generative Models

Semantics-Guided Latent Space Exploration for Shape Generation Tansin Jahan, Yanran Guan, and Oliver van Kaick

115

Towards a Neural Graphics Pipeline for Controllable Image Generation Xuelin Chen, Daniel Cohen-Or, Baoquan Chen, and Niloy J. Mitra

127

Write Like You: Synthesizing Your Cursive Online Chinese Handwriting via Metric-based Meta Learning

Shusen Tang and Zhouhui Lian

141

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TABLE OF CONTENTS Deep Rendering

Practical Face Reconstruction via Differentiable Ray Tracing

Abdallah Dib, Gaurav Bharaj, Junghyun Ahn, Cédric Thébault, Philippe Gosselin, Marco Romeo, and Louis Chevallier

153

Learning Multiple-Scattering Solutions for Sphere-Tracing of Volumetric Subsurface Effects Ludwic Leonard, Kevin Höhlein, and Rüdiger Westermann

165

Deep HDR Estimation with Generative Detail Reconstruction Yang Zhang and Tunc O. Aydin

179

Fabrication

Automatic Surface Segmentation for Seamless Fabrication Using 4-axis Milling Machines Stefano Nuvoli, Alessandro Tola, Alessandro Muntoni, Nico Pietroni, Enrico Gobbetti, and Riccardo Scateni

191

Neural Acceleration of Scattering-Aware Color 3D Printing

Tobias Rittig, Denis Sumin, Vahid Babaei, Piotr Didyk, Alexey Voloboy, Alexander Wilkie, Bernd Bickel, Karol Myszkowski, Tim Weyrich, and Jaroslav Kˇrivánek

205

Levitating Rigid Objects with Hidden Rods and Wires

Sarah Kushner, Risa Ulinski, Karan Singh, David I. W. Levin, and Alec Jacobson

221

Sampling Theory

Correlation-Aware Multiple Importance Sampling for Bidirectional Rendering Algorithms Pascal Grittmann, Iliyan Georgiev, and Philipp Slusallek

231

Cyclostationary Gaussian Noise: Theory and Synthesis Nicolas Lutz, Basile Sauvage, and Jean-Michel Dischler

239

Learning Pose Manifolds and Motor Skills

Learning and Exploring Motor Skills with Spacetime Bounds Li-Ke Ma, Zeshi Yang, Xin Tong, Baining Guo, and KangKang Yin

251

LoBSTr: Real-time Lower-body Pose Prediction from Sparse Upper-body Tracking Signals Dongseok Yang, Doyeon Kim, and Sung-Hee Lee

265

Mesh Generation

Layout Embedding via Combinatorial Optimization Janis Born, Patrick Schmidt, and Leif Kobbelt

277

Geometric Construction of Auxetic Metamaterials

Georges-Pierre Bonneau, Stefanie Hahmann, and Johana Marku

291

Quad Layouts via Constrained T-Mesh Quantization Max Lyon, Marcel Campen, and Leif Kobbelt

305

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TABLE OF CONTENTS Material Acquisition and Estimation

Adversarial Single-Image SVBRDF Estimation with Hybrid Training Xilong Zhou and Nima Khademi Kalantari

315

Perceptual Quality of BRDF Approximations: Dataset and Metrics

Guillaume Lavoué, Nicolas Bonneel, Jean-Philippe Farrugia, and Cyril Soler

327

Fluids

Honey, I Shrunk the Domain: Frequency-aware Force Field Reduction for Efficient Fluids Op- timization

Jingwei Tang, Vinicius C. Azevedo, Guillaume Cordonnier, and Barbara Solenthaler

339

Two-step Temporal Interpolation Network Using Forward Advection for Efficient Smoke Simu- lation

Young Jin Oh and In-Kwon Lee

355

Patch Erosion for Deformable Lapped Textures on 3D Fluids

Jonathan Gagnon, Julián E. Guzmán, David Mould, and Eric Paquette

367

Learning from Human Motion

Walk2Map: Extracting Floor Plans from Indoor Walk Trajectories Claudio Mura, Renato Pajarola, Konrad Schindler, and Niloy Mitra

375

Learning Human Search Behavior from Egocentric Visual Inputs Maks Sorokin, Wenhao Yu, Sehoon Ha, and C. Karen Liu

389

Deep Detail Enhancement for Any Garment

Meng Zhang, Tuanfeng Wang, Duygu Ceylan, and Niloy J. Mitra

399

Visualization

Enabling Viewpoint Learning through Dynamic Label Generation

Michael Schelling, Pedro Hermosilla, Pere-Pau Vázquez, and Timo Ropinski

413

Blue Noise Plots

Christian van Onzenoodt, Gurprit Singh, Timo Ropinski, and Tobias Ritschel

425

Shape Analysis

Orthogonalized Fourier Polynomials for Signal Approximation and Transfer

Filippo Maggioli, Simone Melzi, Maks Ovsjanikov, Michael M. Bronstein, and Emanuele Rodolà

435

Physically-based Simulation

Physically-based Book Simulation with Freeform Developable Surfaces Thomas Wolf, Victor Cornillère, and Olga Sorkine-Hornung

449

Flow Visualization

Curve Complexity Heuristic KD-trees for Neighborhood-based Exploration of 3D Curves Yucheng Lu, Luyu Cheng, Tobias Isenberg, Chi-Wing Fu, Guoning Chen, Hui Liu, Oliver Deussen, and Yunhai Wang

461

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TABLE OF CONTENTS Data Structures

SnakeBinning: Efficient Temporally Coherent Triangle Packing for Shading Streaming Jozef Hladky, Hans-Peter Seidel, and Markus Steinberger

475

Hierarchical Raster Occlusion Culling

Gi Beom Lee, Moonsoo Jeong, Yechan Seok, and Sungkil Lee

489

Analyzing and Integrating RGB-D Images

Interactive Photo Editing on Smartphones via Intrinsic Decomposition

Sumit Shekhar, Max Reimann, Maximilian Mayer, Amir Semmo, Sebastian Pasewaldt, Jürgen Döllner, and Matthias Trapp

497

RigidFusion: RGB-D Scene Reconstruction with Rigidly-moving Objects Yu-Shiang Wong, Changjian Li, Matthias Nießner, and Niloy J. Mitra

511

Spatiotemporal Texture Reconstruction for Dynamic Objects Using a Single RGB-D Camera Hyomin Kim, Jungeon Kim, Hyeonseo Nam, Jaesik Park, and Seungyong Lee

523

Skinning and Deformation

MultiResGNet: Approximating Nonlinear Deformation via Multi-Resolution Graphs Tianxing Li, Rui Shi, and Takashi Kanai

537

Velocity Skinning for Real-time Stylized Skeletal Animation

Damien Rohmer, Marco Tarini, Niranjan Kalyanasundaram, Faezeh Moshfeghifar, Marie-Paule Cani, and Victor Zordan

549

Expressive Modeling

STALP: Style Transfer with Auxiliary Limited Pairing

David Futschik, Michal Kuˇcera, Mike Lukáˇc, Zhaowen Wang, Eli Shechtman, and Daniel Sýkora

563

Local Light Alignment for Multi-Scale Shape Depiction

Nolan Mestres, Romain Vergne, Camille Noûs, and Joëlle Thollot

575

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Eurographics Outstanding Technical Contributions Award 2021:

Paolo Cignoni

Paolo Cignoni is Research Director at CNR-ISTI and head of the Visual Computing Laboratory. He received his PhD in Com- puter Science at the University of Pisa in 1998. He is a fellow of the Eurographics Association and has been awarded the First Euro- graphics Young researcher award in 2004.

The research of Paolo Cignoni has been highly influential and is genuinely pioneering. His primary technical contributions cover the entire 3D content creation pipeline, from scanning, analyzing, and processing 3D geometry to visualizing and digitally fabricat- ing geometric models. His early work on mesh simplification and multi-resolution modeling has shaped the field of geometry pro- cessing in its early days. He has developed new algorithms to ap- proximate geometric models with controlled error, thus enabling scalable processing of the large geometric data sets that emerged through the proliferation of 3D scanning technologies. His semi- nal paper Metro: Measuring Error on Simplified Surfaces (1998) is the third most widely cited paper appeared in Computer Graphics Forum (following WoS).

Beyond advancing theoretical concepts, Paolo Cignoni’s work is distinguished by high practical relevance. For example, his paper on Polycube-Maps has been quickly and widely adopted both in research and industry to simplify texture mapping on complex do- mains with easy integration on modern graphics hardware. He is the leading force behind the development of MeshLab, the popu- lar open-source system for processing raw 3D meshes, with wide- ranging functionalities for editing, cleaning, inspecting, render- ing, texturing and converting meshes. This exceptional effort has enabled numerous researchers and practitioners “to stand on the shoulders of giants”, by providing easy access to a wealth of ge- ometric processing methods that have been developed by him and his team and within the broader scientific community.

Paolo Cignoni is also one of the pioneers of the emerging field of computational fabrication. He proposed innovative algorithmic solutions for the design and optimization of fabricable geometric models, ranging from micro-structures to large scale architectural designs, such as the Flexmaps Pavilion that was awarded the IASS Form and Force Competition Prize. He has applied his extensive expertise in 3D scanning, geometry processing, and digital fabri- cation to the field of Cultural Heritage. He proposed novel digital methods to accurately acquire, visualize, and physically replicate cultural artifacts, thus linking his technical research to questions of profound cultural and societal importance.

Paolo Cignoni is a highly prolific researcher who has published more than 200 papers. He is an active member of the scientific com- munity where he regularly serves on major program committees as well as the editorial boards of many leading journals. He co-chaired the Eurographics conference in 2012 and is currently a member of the Executive Committee of the Eurographics Association and an EG Fellow.

Eurographics is pleased to recognize Paolo Cignoni with the 2021 Outstanding Technical Contributions Award.

© 2021 The Author(s)

Computer Graphics Forum © 2021 The Eurographics Association and John Wiley & Sons Ltd. Published by John Wiley & Sons Ltd.

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Eurographics Young Researcher Award 2021:

Tobias Günther

Tobias Günther is awarded the EUROGRAPHICS Young Re- searcher Award 2021. He received his MSc in Computer Science at Magdeburg University with highest honors in 2013. He then received his PhD in Visualization and Computer Graphics from Magdeburg University (summa cum laude) in 2016, under the su- pervision of Holger Theisel. From 2016 until 2020 he was a postdoc in the Computer Graphics Lab at ETH Zürich. In 2020, he became a professor of visual computing (W2) at the Friedrich- Alexander University of Erlangen-Nuremberg.

Günther has made a large number of original, methodically deep and widely recognized contributions to the area of visualization.

More specifically, he contributed several important new methods for the visualization of high-dimensional and time-varying data, as well as for the feature-based visualization of flow data. As an ex- ample, he proposed new techniques from light transport in hetero- geneous participating media to the unbiased rendering of features in Lagrangian scalar fields. In flow visualization, Tobias Günther made a number of contributions in extracting and visualizing inte- gral geometry, studying the vortical motion and separation behavior

of particles, and extending traditional massless particle visualiza- tion to finite-sized objects.

His academic portfolio is versatile, including works on rendering in top graphics venues. For example, he proposed a new technique to accelerate Monte Carlo rendering to provide faster feedback and more control for artists. Furthermore, he explored real-time ren- dering solutions that efficiently mimic natural phenomena, such as interactive material aging simulations. More recently, he is inves- tigating cross-sectional algorithmic concepts at the intersection of machine learning, specifically deep learning, and flow visualiza- tion.

Günther is the recipient of an impressive number of important awards, such as the EUROGRAPHICS PhD Thesis Award, IEEE Visualization and Graphics Technical Committee (VGTC) Disser- tation Award, Best Paper Award at TopoInVis, as well as Best Paper Honorable Mentions at EUROGRAPHICS and IEEE Visualization.

Eurographics is pleased to recognize Tobias Günther with the 2021 Young Researcher Award.

© 2021 The Author(s)

Computer Graphics Forum © 2021 The Eurographics Association and John Wiley & Sons Ltd. Published by John Wiley & Sons Ltd.

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Eurographics Young Researcher Award 2021:

Adrián Jarabo

Adrián Jarabo receives the EUROGRAPHICS Young Re- searcher Award 2021. He obtained his PhD in Computer Graphics from the Universidad de Zaragoza, where he was advised by Prof.

Diego Gutierrez. He is now an Assistant Professor at Universidad de Zaragoza (Spain), where he works on topics in computer graph- ics and computational imaging.

Adrian Jarabo has done highly original, methodically deep, and widely cited work on the different aspects of physically-based light transport, including simulation and appearance modeling. He also worked on research questions in the areas of perception and light field editing. In 2017, he received the EUROGRAPHICS PhD Award.

A highlight of his research are his seminal contributions to the area of light transport modeling for transient and non-line-of-sight imaging. This is an emerging and very exciting research area at the intersection of optics, computational imaging and computer graph- ics. For example, he presented seminal new techniques to capture and visualize the propagation of light in space. He also proposed new techniques to effectively simulate and analyze transient light transport, where the speed of light can no longer be considered in- finite, by means of computer graphics. Furthermore, he developed new ways to solve challenging inverse problems arising in transient imaging. An example from his recent work in this domain is a new approach for non-line-of-sight imaging with a new wave optical approach, which was published in the journal Nature.

The work of Adrián Jarabo is published in the top conferences

and journals in computer graphics and optics and is widely cited.

The fact that one of his works was published in the journal Nature speaks to the impact of his work in the scientific community at large.

Eurographics is pleased to recognize Adrian Jarabo with the 2021 Young Researcher Award.

© 2021 The Author(s)

Computer Graphics Forum © 2021 The Eurographics Association and John Wiley & Sons Ltd. Published by John Wiley & Sons Ltd.

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