Proceedings of the 31st International Conference on Computer Graphics and Vision (GraphiCon 2021) Vladimir Galaktionov 1, Alexey Voloboy 1 and Alexander Bondarev 1 1 Keldysh Institute of Applied Mathematics Russian Academy of Sciences, Miusskaya sq., 4, Moscow, 125047, Russian Federation 1 PREFACE This volume contains the papers presented at the 31st International Conference on Computer Graphics and Vision GraphiCon 2021 (https://graphicon.nntu.ru/home_en/), held at Nizhny Novgorod State Technical University n.a. R.E. Alekseev (Nizhny Novgorod, Russia) on 27-30 September 2021. First organized in 1991, the GraphiCon conference is the largest in Russia and the CIS annual meeting of researchers in Computer Graphics, Image Processing and Computer Vision, Visualization Systems and the Virtual Environment. The key organizers of the conference for many years have been the GraphiCon Scientific Society (https://www.graphicon.ru/en), Lomonosov Moscow State University, and Keldysh Institute of Applied Mathematics of the RAS (Russian Academy of Sciences). The mission of the conference is contribution to the development of computer graphics, image processing and computer vision in Russia and the CIS; improving the system of training of specialists in these fields; attraction of talented students, graduate students, professionals; expansion of ties between academia and industry. In 2021 the conference was organized into 9 sessions as follows. 1. Intelligent Solutions in Computer Graphics. 2. Scientific Visualization and Visual Analytics. 3. Computer Vision. 4. Biomedical Image Processing and Analysis. 5. Digital Earth and Big Data. 6. Geometric Modeling. Computer Graphics in Education. 7. Computer Graphics in Material Science, Light Engineering and Design. 8. Artificial Intelligence, Cognitive Technology and Robotics. 9. Graphic Technologies for the Product Life Cycle Information Support. The EasyChair conference management system was used for handling the submission and double blind review process. There were 205 papers submitted for peer-review to the conference. Out of these, 124 papers were accepted for this volume. All of these papers were presented at the conference physically or online. We would like to thank all members of the Program Committee for their efforts in reviewing the submitted papers. We also thank the Organizing Committee and local organizers for their work in preparing and holding the conference. Finally, we thank all authors who submitted their papers to the conference. See all of you at the next GraphiCon in 2022! October 2021 Vladimir Galaktionov Alexey Voloboy Alexander Bondarev GraphiCon 2021: 31st International Conference on Computer Graphics and Vision, September 27-30, 2021, Nizhny Novgorod, Russia EMAIL: vlgal@gin.keldysh.ru (V. Galaktionov); voloboy@gin.keldysh.ru (A. Voloboy); bond@keldysh.ru (A. Bondarev) ORCID: 0000-0001-6460-7539 (V. Galaktionov); 0000-0003-1252-8294 (A. Voloboy); 0000-0003-3681-5212 (A. Bondarev) ©️ 2021 Copyright for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0). CEUR Workshop Proceedings (CEUR-WS.org) ORGANIZATION We list below the people who contributed to the organization and holding of the GraphiCon 2021 conference. Organizing Committee  Sergey Dmitriev (co- chairman), Nizhny Novgorod State Technical University n.a. R.E. Alekseev  Sergey Rotkov (co-chairman), Nizhny Novgorod State University of Architecture and Civil Engineering  Aleksandr Filinskikh (deputy chairman), Nizhny Novgorod State Technical University n.a. R.E. Alekseev  Maria Berberova (deputy chairman), Research Center for Physical and Technical Informatics, MIREA – Russian Technological University, Moscow  Alexander Bondarev, Keldysh Institute of Applied Mathematics RAS, Moscow  Vladimir Budak, National Research University Moscow Power Engineering Institute  Vladimir Galaktionov, Keldysh Institute of Applied Mathematics RAS, Moscow  Eugene Eremchenko, Lomonosov Moscow State University  Leonid Karpov, Ivannikov Institute for System Programming RAS, Moscow  Valery Khranilov, Nizhny Novgorod State Technical University n.a. R.E. Alekseev  Anton Konushin, Samsung Research Center, Moscow  Andrey Krylov, Lomonosov Moscow State University  Lyudmila Massel, Melentiev Energy Systems Institute Siberian Branch of RAS, Irkutsk  Anton Oboimov, Moscow Institute of Physics and Technology, Research Center for Physical and Technical Informatics, Moscow  Timour Paltashev, Radeon Technology Group, Advanced Micro Devices, USA  Aleksandr Podvesovskii, Bryansk State Technical University  Alexey Tolok, V.A. Trapeznikov Institute of Control Sciences RAS, Moscow State Technological University MSTU STANKIN  Vadim Turlapov, Lobachevsky State University of Nizhny Novgorod  Alexey Voloboy, Keldysh Institute of Applied Mathematics RAS, Moscow  Alena Zakharova, V.A. Trapeznikov Institute of Control Sciences RAS, Moscow  Dmitry Zhdanov, ITMO University, Saint Petersburg Program Committee  Vladimir Galaktionov (chairmain), Keldysh Institute of Applied Mathematics RAS, Moscow, Russia  Temenoujka Bandrova, University of Architecture, Civil Engineering and Geodesy, Sofia, Bulgaria  Boris Barladian, Keldysh Institute of Applied Mathematics RAS, Moscow, Russia  Yuri Baturin, S.I. Vavilov Institute for the History of Science and Technology RAS, Moscow, Russia  Vladimir Belyakov, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Russia  Valery Bobkov, Institute of Automation and Control Processes Far Eastern Branch of RAS, Vladivostok, Russia  Alexander Bondarev, Keldysh Institute of Applied Mathematics RAS, Moscow, Russia  Vladimir Budak, National Research University Moscow Power Engineering Institute, Russia  Svetlana Chuprina, Perm State University, Russia  Victor Debelov, Institute of Computational Mathematics and Mathematical Geophysics Siberian Branch of RAS, Novosibirsk, Russia  Yuri Dubnischev, Kutateladze Institute of Thermophysics Siberian Branch of RAS, Novosibirsk, Russia  Eugene Eremchenko, Lomonosov Moscow State University, Russia  Sergey Ershov, Keldysh Institute of Applied Mathematics RAS, Moscow, Russia  Aleksandr Filinskikh, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Russia  Vladimir Frolov, Keldysh Institute of Applied Mathematics RAS, Lomonosov Moscow State University, Russia  Kirill Garanzha, CentiLeo LLC company, Moscow, Russia  Olga Gerget, National Research Tomsk Polytechnic University, Russia  Alexandra Getmanskaya, Lobachevsky State University of Nizhny Novgorod, Russia  Alexey Ignatenko, Lomonosov Moscow State University, Russia  Ruslan Isaev, Bryansk State Technical University, Russia  Alexander Khvostikov, Lomonosov Moscow State University, Russia  Valery Khranilov, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Russia  Andrey Kirichek, Bryansk State Technical University, Russia  Milan Konechny, Masaryk University, Brno, Czech Republic  Evgeny Konopatsky, Donbas National Academy of Civil Engineering and Architecture, Makeevka, Ukraine  Anton Konushin, Samsung Research Center, Moscow, Russia  Dmitriy Korostelyov, Bryansk State Technical University, Russia  Andrey Krylov, Lomonosov Moscow State University, Russia  Alexander Kuzmenko, Bryansk State Technical University, Russia  Dmitry Lagerev, Bryansk State Technical University, Russia  Marina Lagunova, Nizhny Novgorod State University of Architecture and Civil Engineering, Russia  Vladimir Lepsky, Institute of Philosophy RAS, Moscow, Russia  Konstantin Makarenko, Bryansk State Technical University, Russia  Lyudmila Massel, Melentiev Energy Systems Institute Siberian Branch of RAS, Irkutsk, Russia  Mikhail Mikhaylyuk, Scientific Research Institute of System Analysis RAS, Moscow, Russia  Andrey Nasonov, Lomonosov Moscow State University, Russia  Stepan Nebaba, National Research Tomsk Polytechnic University, Russia  Alexander Pak, National Research Tomsk Polytechnic University, Russia  Timour Paltashev, Radeon Technology Group, Advanced Micro Devices, USA  Konstantin Panchuk, Omsk State Technical University, Russia  Victor Pilyugin, National Research Nuclear University MEPhI, Moscow, Russia  Aleksandr Podvesovskii, Bryansk State Technical University, Russia  Evgeny Popov, Nizhny Novgorod State University of Architecture and Civil Engineering, Russia  Igor Potemin, ITMO University, Saint Petersburg, Russia  Sergey Rotkov, Nizhny Novgorod State University of Architecture and Civil Engineering, Russia  Konstantin Ryabinin, Perm State University, Russia  Vitaly Semenov, Ivannikov Institute for System Programming RAS, Moscow, Russia  Lev Shapiro, Keldysh Institute of Applied Mathematics RAS, Moscow, Russia  Aleksey Shklyar, National Research Tomsk Polytechnic University, Russia  Tatyana Sivkova, SIAMS LLC, Ekaterinburg, Russia  Eleonora Sokolova, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Russia  Dmitry Sorokin, Lomonosov Moscow State University, Russia  Valery Spasennikov, Bryansk State Technical University, Russia  Irina Stolbova, Perm National Research Polytechnic University, Russia  Josef Strobl, University of Salzburg, Austria  Vladimir Tikunov, Lomonosov Moscow State University, Russia  Alexey Tolok, V.A. Trapeznikov Institute of Control Sciences RAS, Moscow State Technological University MSTU STANKIN, Moscow, Russia  Andrey Trubakov, Bryansk State Technical University, Russia  Evgeniy Trubakov, Bryansk State Technical University, Russia  Vadim Turlapov, Lobachevsky State University of Nizhny Novgorod, Russia  Evgeny Vasiliev, Lobachevsky State University of Nizhny Novgorod, Russia  Dmitry Vatolin, Lomonosov Moscow State University, Russia  Evgeniya Vekhter, National Research Tomsk Polytechnic University, Russia  Alexey Voloboy, Keldysh Institute of Applied Mathematics RAS, Moscow, Russia  Changlin Wang, China Aerospace Studies Institute, Beijing, China  Alena Zakharova, V.A. Trapeznikov Institute of Control Sciences RAS, Moscow, Russia  Dmitry Zhdanov, ITMO University, Saint Petersburg, Russia  Dmitry Zhevnerchuk, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Russia  Irina Znamenskaya, Lomonosov Moscow State University, Russia