# Foreword to the Special Section on Shape Modeling International 2024 (SMI2024)

Georges-Pierre Bonneau<sup>a,b,c</sup>, Tao Ju<sup>d</sup>, Zichun Zhong<sup>e</sup>

ARTICLE INFO

Author's version

ABSTRACT

This Special Section of Computers & Graphics (C&G), features the full papers presented at the Shape Modeling International 2024 conference — SMI 2024 (https://smiconf.github.io/2024/). The conference was organised by the Computer Graphics and Imaging Lab and hosted at Wayne State University, July 11 to 13, 2024.

Shape Modeling International provides yearly an international forum for the dissemination of new mathematical theories and computational techniques for modeling, simulating, and processing digital representations of shapes and their properties to a community of researchers, developers, students, and practitioners across a wide range of fields. The invited speakers, Professor Wenping Wang from Texas A&M University, USA, and Professor Hao (Richard) Zhang from Simon Fraser University, Canada, provided interesting insights on Neural reconstruction and generation of 3D shapes and on Learning differentiable primitive representations for CAD shape modeling, respectively.

SMI2024 has assigned four prestigious prizes, namely, two Tosiyasu L. Kunii distinguished researcher awards, presented to **Prof. Stefanie Hahmann** from Grenoble INP and INRIA, France and to **Prof. Gershon Elber** from Technion, Israel, and two SMI young investigator awards, presented to **Dr. Amal Dev Parakkat** from Telecom Paris Tech in France and to **Dr. Gianmarco Cherchi** from University of Cagliari, Italy. Furthermore, this year the Alexander Pasko service award, recognizing people who made significant contributions to the organization of SMI conferences, has been presented to **Prof. Ergun Akleman** from

Texas A&M University, USA, for his long-standing support to Shape Modeling International, besides his scientific contributions to the field. Interviews of all awardees featuring pictures have been collected and published in Computer & Graphics [1].

The full paper submission track followed a 2-stage double-blind review process. Each paper was assessed by 4 reviewers on average. Of the 31 papers submitted to the full paper track 11 were accepted and are published in this Special Section of Computers & Graphics. Besides the 11 reviewed papers, SMI2024 invited papers from Computer & Graphics; 4 accepted the invitation and have been presented at the conference: *Interactive pose and shape editing with simple sketches from different viewing angles* [2], by Caro Schmitz, Constantin Rösch, Domenic Zingheim and Reinhard Klein, *Neural inverse procedural modeling of knitting yarns from images* [3] by Elena Trunz, Jonathan Klein, Jan Müller, Lukas Bode, Ralf Sarlette, Michael Weinmann and Reinhard Klein, *TAssembly: Data-driven fractured object assembly using a linear template model* [4] by Ziyue Deng, Junfeng Jiang, Zhengming Chen, Wenxi Zhang, Qingqiang Yao, Chen Song, Yifan Sun, Zhenpei Yang, Siming Yan, Qixing Huang and Chandrajit Bajaj, and *TARig: Adaptive template-aware neural rigging for humanoid characters* [5], by Jing Ma and Dongliang Zhang.

SMI2024 received financial sponsorship from Elsevier for the *Best Paper Award* and one *Honourable Mention*. After all the presentations, the SMI award committee selected the best paper among those who have obtained the replicability stamp, to encourage researchers to publish their code and make it available to the community. The SMI2024 best paper award has been presented to Yukun Lu, Yuhang Wang, Peng Song, Hang Siang Wong, Yingjuan Mok and Ligang Liu for the paper *Computa-

<footnote><sup>a</sup>Université Grenoble Alpes, France</footnote>

<footnote><sup>b</sup>Laboratoire Jean Kuntzmann, France</footnote>

<footnote><sup>c</sup>INRIA Grenoble, France</footnote>

<footnote><sup>d</sup>Washington University in St. Louis, USA</footnote>

<footnote><sup>e</sup>Wayne State University, USA</footnote>

<footnote>*e-mail: georges-pierre.bonneau@inria.fr* (Georges-Pierre Bonneau), *taoju@wustl.edu* (Tao Ju), *zichunzhong@wayne.edu* (Zichun Zhong)</footnote>
tional design of custom-fit PAP masks [6], and the honourable mention went to Guillaume Gisbert, Raphaëlle Chaine and David Coeurjolly for the paper *Neural inpainting of folded fabrics with interactive editing* [7].

Selected full papers are available at https://www.sciencedirect.com/special-issue/1009JL5V4RL. These works cover a variety of topics, including geometric modelling and processing, curves and surfaces, object and scene reconstruction and understanding. All accepted papers and invited talks were orally presented and grouped into the following themed sessions:

## Interactive Modeling

* 3D sketching in immersive environments: Shape from disordered ribbon strokes, Georges-Pierre Bonneau and Stefanie Hahmann [8].

* Interactive pose and shape editing with simple sketches from different viewing angles, Caro Schmitz and Constantin Rösch and Domenic Zingsheim and Reinhard Klein [2]. **[invited from C&G]**

* Neural inpainting of folded fabrics with interactive editing, Guillaume Gisbert and Raphaëlle Chaine and David Coeurjolly [7]. **[Honourable Mention and Replicability Stamp]**

## Computational Design

* Neural inverse procedural modeling of knitting yarns from images, Elena Trunz, Jonathan Klein, Jan Müller, Lukas Bode, Ralf Sarlette, Michael Weinmann and Reinhard Klein [3]. **[Invited from C&G]**

* Volumetric nonwoven structures, Shape algebra, Shape modeling and design, P-adic numbers, Tolga Yildiz and Ergun Akleman [9]. **[Replicability Stamp]**

* Differentiable microstructures design via anisotropic thermal diffusion, Qi Wang and Qing Fang and Xiaoya Zhai and Ligang Liu and Xiao-Ming Fu [10]. **[Replicability Stamp]**

## Parametric and Subdivision Surfaces

* Interior control structure for Generalized Bézier patches over curved domains, Márton Vaitkus and Péter Salvi and Tamás Várady [11].

* Computational design of custom-fit PAP masks, Yukun Lu and Yuhang Wang and Peng Song and Hang Siang Wong and Yingjuan Mok and Ligang Liu [6]. **[Best Paper and Replicability Stamp]**

* Quadratic-attraction subdivision with contraction-ratio $\lambda=12$, Kestutis Karciauskas and Jörg Peters [12]. **[Replicability Stamp]**

## Shape and Learning

* Multi-scale Knowledge Transfer Vision Transformer for 3D vessel shape segmentation, Michael J. Hua and Junjie Wu and Zichun Zhong [13].

* TAssembly: Data-driven fractured object assembly using a linear template model, Ziyue Deng and Junfeng Jiang and Zhengming Chen and Wenxi Zhang and Qingqiang Yao and Chen Song and Yifan Sun and Zhenpei Yang and Siming Yan and Qixing Huang and Chandrajit Bajaj [4].

* Conditional room layout generation based on graph neural networks, Zhihan Yao and Yuhang Chen and Jiahao Cui and

Shoulong Zhang and Shuai Li and Aimin Hao [14].

## Simulation and Deformation

* An improved CPU-GPU parallel framework for real-time interactive cutting simulation of deformable objects, Jingqiang Wang and Shiyu Jia and Guodong Wang and Zhenkuan Pan and Xiaokang Yu [15].

* Dynamics simulation-based packing of irregular 3D objects, Qiubing Zhuang and Zhonggui Chen and Keyu He and Juan Cao and Wenping Wang [16].

* Retargeting of facial model for unordered dense point cloud, Yuping Ye and Juncheng Han and Jixin Liang and Di Wu and Zhan Song [17].

* TARig: Adaptive template-aware neural rigging for humanoid characters, Jing Ma and Dongliang Zhang [5]. **[Invited from C&G]**

We would like to thank the 75 IPC members and the invited external reviewers for their reviewing efforts, which helped us to create a high-quality program and led to the success of this Special Section. We are grateful to all session chairs Zichun Zhong, Georges-Pierre Bonneau, Richard Zhang, Tao Ju and Jörg Peters for their caring and timely direction of the SMI sessions; to the conference co-chairs Jing Hua, Raphaëlle Chaine and Hui Huang; to the communication chairs Silvia Biasotti, Yang Liu for their support and for the timely management of the conference web site; to Ergun Akleman who supervised the SMI organization and to Joaquim Jorge, editor in-chief of C&G and to the whole Elsevier C&G Team for making this Special Section possible. Finally, we deeply thank all authors for their interest and support to SMI 2024 and the speakers for making SMI2024 a lively and exiting conference.

## International Program Committee

Valery Adzhiev, Bournemouth University, England

Gill Barequet, Technion Israel Institute of Technology, Israel

Loic Barthe, Université de Toulouse, France

Alexander Belyaev, Heriot-Watt University, UK

Pengbo Bo, Harbin Institute of Technology, P.R. China

Marcel Campen, Osnabrück University, Germany

Juan Cao, Xiameng University, P.R. China

Chiara Eva Catalano, CNR-IMATI, Italy

Raphaelle Chaine, Université of Lyon, France

Zhonggui Chen, Xiameng University, P.R. China

Renjie Chen, University of Science and Technology of China, P.R. China

Edward Chien, MIT, USA

Jeremie Dumas, Adobe Research, USA

Ye Duan, University of Missouri, USA

Gershon Elber, Technion, Israel

Bianca Falcidieno, CNR-IMATI, Italy

Leila De Floriani, University of Maryland, USA

Hongbo Fu, City University of Hong Kong, P.R. China

Xiaoming Fu, University of Science and Technology of China, P.R. China

Eric Galin, University of Lyon, France

Lin Gao, Chinese Academy of Sciences, P.R. China

Yotam Gingold, George Mason University, USA
Daniela Giorgi, CNR-ISTI, Italy

Eric Guerin, INSA de Lyon, France

Jianwei Guo, Chinese Academy of Sciences, P.R. China

Xiaohu Guo, The University of Texas at Dallas, USA

Stefanie Hahmann, Grenoble INP and INRIA, France

Fazhi He, Wuhan University, P.R. China

Ying He, Nanyang Technological University, Singapore

Franck Hetroy-Wheeler, University of Strasbourg, France

Klaus Hildebrandt, TU Delft, Netherlands

Haibin Huang, Kwai Inc., USA

Kai Hormann, Università della svizzera italiana, Switzerland

Haibin Huang, Kwai Inc., P.R. China

Jin Huang, Zhejiang University, P.R. China

Ioannis Ivrissimtzis, Durham University, UK

Xiaohong Jia, Chinese Academy of Sciences, P.R. China

Bert Jüttler, Johannes Kepler University, Austria

Takashi Kanai, University of Tokyo, Japan

Hamid Laga, Murdoch University, Australia

Xin Li, Texas A&M University, USA

Zhouhui Lian, Peking University, P.R. China

Hongwei Lin, Zhejiang University, P.R. China

Lin Lu, Shandong University, P.R. China

Chongyang Ma, ByteDance

Claudio Mancinelli, University of Genova, Italy

Martin Marinov, Autodesk, USA

Nicolas Mellado, CNRS IRIT, France

Ahmad Nasri, Boulder Graphics LLC, USA

Stefan Ohrhallinger, Vienna University of Technology, Austria

Yutaka Ohtake, University of Tokyo, Japan

Amal Dev Parakkat, Institut Polytechnique de Paris, France

Konrad Polthier, Freie Universität Berlin, Germany

Hong Qin, Stony Brook University, USA

Camille Schreck, INRIA Nancy, France

Carlo Sequin, UC Berkeley, USA

Liyong Shen, Chinese Academy of Sciences, P.R. China

Zhenyu Shu, Zhejiang University, P.R. China

Keke Tang, Guangzhou University, P.R. China

Daniel Thalmann, Swiss Federal Institute of Technology, Switzerland

Yiying Tong, Michigan State University, USA

Georg Umlauf, HTWG Konstanz, Germany

Amir Vaxman, The University of Edinburgh, UK

Charlie C.L. Wang, The University of Manchester, UK

Pengshuai Wang, Peking University, P.R. China

Weiming Wang, Dalian University of Technology, P.R. China

Kui Wu, Tencent North America, USA

Tieru Wu, Jilin University, P.R. China

Kai Xu, National University of Defense Technology, P.R. China

Gang Xu, Hangzhou Dianzi University, P.R. China

Qiang Zou, Zhejiang University, P.R. China

Yongjie Jessica Zhang, Carnegie Mellon University, USA

award winners. Computers & Graphics 2024;123:104021. URL: https://www.sciencedirect.com/science/article/pii/S0097849324001560. doi:https://doi.org/10.1016/j.cag.2024.104021.

[2] Schmitz, C, Rösch, C, Zingsheim, D, Klein, R. Inter-active pose and shape editing with simple sketches from different viewing angles. Computers & Graphics 2023;114:347–356. URL: https://www.sciencedirect.com/science/article/pii/S009784932300119X. doi:https://doi.org/10.1016/j.cag.2023.06.024.

[3] Trunz, E, Klein, J, Müller, J, Bode, L, Sarlette, R, Weinmann, M, et al. Neural inverse procedural modeling of knitting yarns from images. Computers & Graphics 2024;118:161–172. URL: https://www.sciencedirect.com/science/article/pii/S0097849323003072. doi:https://doi.org/10.1016/j.cag.2023.12.013.

[4] Deng, Z, Jiang, J, Chen, Z, Zhang, W, Yao, Q, Song, C, et al. Tassembly: Data-driven fractured object assembly using a linear template model. Computers & Graphics 2023;113:102–112. URL: https://www.sciencedirect.com/science/article/pii/S0097849323000560. doi:https://doi.org/10.1016/j.cag.2023.05.003.

[5] Ma, J, Zhang, D. Tarig: Adaptive template-aware neural rigging for humanoid characters. Computers & Graphics 2023;114:158–167. URL: https://www.sciencedirect.com/science/article/pii/S0097849323000730. doi:https://doi.org/10.1016/j.cag.2023.05.018.

[6] Lu, Y, Wang, Y, Song, P, Wong, HS, Mok, Y, Liu, L. Computational design of custom-fit pap masks. Computers & Graphics 2024;122:103998. URL: https://www.sciencedirect.com/science/article/pii/S009784932400133X. doi:https://doi.org/10.1016/j.cag.2024.103998.

[7] Gisbert, G, Chaine, R, Coeurjolly, D. Neural inpainting of folded fabrics with interactive editing. Computers & Graphics 2024;122:103997. URL: https://www.sciencedirect.com/science/article/pii/S0097849324001328. doi:https://doi.org/10.1016/j.cag.2024.103997.

[8] Bonneau, GP, Hahmann, S. 3d sketching in immersive environments: Shape from disordered ribbon strokes. Computers & Graphics 2024;123:103978. URL: https://www.sciencedirect.com/science/article/pii/S0097849324001134. doi:https://doi.org/10.1016/j.cag.2024.103978.

[9] Yildiz, T, Akleman, E. Volumetric nonwoven structures: An algebraic framework for systematic design of infinite polyhedral frames using nonwoven fabric patterns. Computers & Graphics 2024;122:103979. URL: https://www.sciencedirect.com/science/article/pii/S0097849324001146. doi:https://doi.org/10.1016/j.cag.2024.103979.

[10] Wang, Q, Fang, Q, Zhai, X, Liu, L, Fu, XM. Differentiable microstructures design via anisotropic thermal diffusion. Computers & Graphics 2024;122:103977. URL: https://www.sciencedirect.com/science/article/pii/S0097849324001122. doi:https://doi.org/10.1016/j.cag.2024.103977.

[11] Vaitkus, M, Salvi, P, Várady, T. Interior control structure for generalized bézier patches over curved domains. Computers & Graphics 2024;121:103952. URL: https://www.sciencedirect.com/science/article/pii/S0097849324000876. doi:https://doi.org/10.1016/j.cag.2024.103952.

[12] Karciauskas, K, Peters, J. Quadratic-attraction subdivision with contraction-ratio $\lambda=12$. Computers & Graphics 2024;123:104001. URL: https://www.sciencedirect.com/science/article/pii/S0097849324001365. doi:https://doi.org/10.1016/j.cag.2024.104001.

[13] Hua, MJ, Wu, J, Zhong, Z. Multi-scale knowledge transfer vision transformer for 3d vessel shape segmentation. Computers & Graphics 2024;122:103976. URL: https://www.sciencedirect.com/science/article/pii/S0097849324001110. doi:https://doi.org/10.1016/j.cag.2024.103976.

[14] Yao, Z, Chen, Y, Cui, J, Zhang, S, Li, S, Hao, A. Conditional room layout generation based on graph neural networks. Computers & Graphics 2024;122:103971. URL: https://www.sciencedirect.com/science/article/pii/S0097849324001067. doi:https://doi.org/10.1016/j.cag.2024.103971.

## References

[1] Falcidieno, B, Wyvill, B, Akleman, E, Peters, J. Shape modeling international (smi) 2024 awards interviews with smi'2024
//doi.org/10.1016/j.cag.2024.103971.

[15] Wang, J, Jia, S, Wang, G, Pan, Z, Yu, X. An improved cpu-gpu parallel framework for real-time interactive cutting simulation of deformable objects. Computers & Graphics 2023;114:59-72. URL: https://www.sciencedirect.com/science/article/pii/S0097849323000687 doi:https://doi.org/10.1016/j.cag.2023.05.013.

[16] Zhuang, Q, Chen, Z, He, K, Cao, J, Wang, W. Dynamics simulation-based packing of irregular 3d objects. Computers & Graphics 2024;123:103996. URL: https://www.sciencedirect.com/science/article/pii/S0097849324001316 doi:https://doi.org/10.1016/j.cag.2024.103996.

[17] Ye, Y, Han, J, Liang, J, Wu, D, Song, Z. Retargeting of facial model for unordered dense point cloud. Computers & Graphics 2024;122:103972. URL: https://www.sciencedirect.com/science/article/pii/S0097849324001079 doi:https://doi.org/10.1016/j.cag.2024.103972.

<figure><img src="image_1.png" /></figure>

Georges-Pierre Bonneau is Professor of Computer Science at Université Grenoble Alpes. He is a member of the research group Maverick within INRIA. GP Bonneau received his MS degree in Mathematics from the Ecole Normale Superieure de Cachan, France, the DEA in Numerical Analysis at the University of Paris VI, France, and the PhD degree in Computer Science from the Uni-

versity of Kaiserslautern, Germany, in 1993. His research centres on Computer Aided Geometric Design, Computational Fabrication, Data Visualization and Visual perception for Computer graphics. He was co-organizer of two Dagstuhl seminars on Scientific Visualization. He is a past member of the Editorial Board Committee of IEEE Transactions on Visualization and Computer Graphics and a current member of the Editorial Board Committee of Computer Aided Design, Elsevier.

<figure><img src="image_2.png" /></figure>

Tao Ju is a Professor in the Department of Computer Science and Engineering at Washington University in St. Louis. He obtained his B.S. and B.A. degrees from Tsinghua University in 2000, and his M.S. and PhD degrees in Computer Science from

Rice University in 2005. He conducts research in computer graphics and bio-medical applications, and is particularly interested in geometric modeling and shape analysis. He has served

as associate editors for IEEE TVCG, CGF, CAD, Graphical Models, and Computational Visual Media. He has served on the program committees of key conferences in computer graphics and has chaired the program committees of Pacific Graphics (2007), SGP (2018), GMP (2019) and SMI (2024). His research is funded by NSF and NIH, including an NSF CAREER award in 2009.

<figure><img src="image_3.png" /></figure>

Zichun Zhong is Associate Professor of Computer Science at Wayne State University, USA. He received his Ph.D. from The University of Texas at Dallas in 2014 and was a postdoctoral fellow at UT Southwestern Medical Center at Dallas from 2014 to 2015. His research interests focus on geometric modeling and computing for computer graphics, 3D computer vision, visualization, and medical image processing. He serves as the asso-

ciate editor of GMOD, guest editors of CAGD and C&G. He is a Technical Paper Chair of SMI 2024 and a Program Co-Chair of GMP 2024. He serves as a program committee member, area chair, and reviewer for many international conferences and journals in his research field. He received the NSF CAREER Award in 2019 and NSF CRII Award in 2016.