Summary
Virtual objects are timeless—they are rarely left derelict for prolonged periods, whereas object degradation is a universal phenomenon in reality, giving a strong impression of the lapse of time. Hence, the aging of virtual objects is a vital topic in the pursuit of physical realism in the area of Computer Graphics.
In fact, many developments in the process of weathering have been offered to depict outdoor objects as having suffered rain and wind damage. Especially, metallic surface rusting is a widespread degradation phenomenon featuring varied manifestations, and hence there exist many known weathering methods targeted at metallic surfaces.
However, most of the existing methods do not consider the effect of rust-preventive paint, which is usually applied to the real metallic surfaces. Besides, few metal weathering methods have not supported 3D deformation, which is also required to express realistic coating film deterioration.
In this thesis study, a novel procedural method for weathering coated metal objects is proposed. In this method, a coated surface is imposed on a 3D triangular mesh. The method allows for the mechanical behavior of deteriorated coating film and deforms the mesh model to express cracking and peeling.
We think much of directability, that is, expertise that enables the systems to be intentionally controlled. In this method, it is possible to control the progress of deterioration by designating the area easy to peel.
Abstract
We try to express the deterioration of coating films by automatic computing rather than by applying measurement data, so this study is not phenomenological. Of course, we aim for a modeling method that simplifies computation, but we put more emphasis on mechanical theories, so this method is physical rather than artificial.
Members
| Name | Affiliation | Web site |
|---|---|---|
 Akinori Ishitobi |
Keio University | |
| Masanori Nakayama |
Keio University |
Video
Demo
Presentation
Publications
Journals
- Akinori Ishitobi, Masanori Nakayama, Issei Fujishiro: “Visual simulation of crack and bend generation in deteriorated films coated on metal objects: Combination of static fracture and position-based deformation,” The Visual Computer, Vol. 39, No. 8, pp. 3403–3415, August 2023 [doi: 10.1007/s00371-023-03029-z]. (Preprint/DemoMovie)
- Akinori Ishitobi, Masanori Nakayama, Issei Fujishiro: “Visual simulation of weathering coated metallic objects,” The Visual Computer, Vol. 36, No. 10, pp. 2383–2393, August 2020 [doi: 10.1007/s00371-020-01947-w]. (Preprint/DemoMovie)
Presentations
International presentations
- Akinori Ishitobi, Masanori Nakayama, Issei Fujishiro: “Visual simulation of crack and bend generation in deteriorated films coated on metal objects: Combination of static fracture and position-based deformation,” Computer Graphics International 2023, Shanghai, China, August 28–September 1, 2023.
- Akinori Ishitobi, Masanori Nakayama, Issei Fujishiro: “Visual simulation of weathering coated metallic objects,” Computer Graphics International 2020, online, October 20–23, 2020. (Presentation)
- Akinori Ishitobi, Masanori Nakayama, Issei Fujishiro: “A deformation method for simulating coating degradation while taking mechanical behavior into account,” 2019 International Conference on Cyberworlds (CW), Kyoto, Japan, October 2–4, 2019, [doi : 10.1109/CW.2019.00066]. (Preprint/Movie/Poster)
Domestic presentations
- Akinori Ishitobi, Masanori Nakayama, Issei Fujishiro: “Visual simulation of crack and bend generation in deteriorated films coated on metal objects: Combination of static fracture and position-based deformation,” invited talk, in Proceedings of Visual Computing 2023, Shibaura Institute of Technology Toyosu Campus, Octorber 17–20, 2023 (in Japanese). (Preprint)
- Issei Fujishiro, Akinori Ishitobi, Shumpei Sugita, Soma Yokota: “The Challenge to Texture Expression by Computer Graphics,” KEIO TECHNO-MALL 2022, No. 53, Tokyo International Forum, December 2, 2022 (in Japanese).
- Akinori Ishitobi, Masanori Nakayama, Issei Fujishiro: “Crack generation and bend of coated films due to aged deterioration―Visual simulation of a quasi-static process by combination of fracture judgement and bend simulation―,” in Proceedings of Visual Computing 2022, pp. 2:1–2:6, Online, October 6–8, 2022, VC paper award (2nd prize), CGVI best presentation award, CGVI student presentation award, IPSJ Yamashita SIG Research Award (in Japanese). (Video/Preprint/Poster)
- Issei Fujishiro, Akinori Ishitobi, Masaru Ohkawara: “Computer graphics for building photorealistic cyberspaces,” KEIO TECHNO-MALL 2020, No. 51, online, December 18, 2020 (in Japanese). (Material by Ishitobi: Video/Poster)
- Akinori Ishitobi, Masanori Nakayama, Issei Fujishiro: “Visual simulation of weathering coated metallic objects,” invited talk, in Proceedings of Visual Computing 2020, pp. 15:1–15:4, Online, December 2–4, 2020 (in Japanese). (Preprint)
- Akinori Ishitobi, Masanori Nakayama, Issei Fujishiro: “Visual simulation of aged coating degradation,” in Proceedings of the 81th National Convention of International Processing Society of Japan, Vol. 4, pp. 125–126 (2ZC-08), Fukuoka University Nanakuma Campus, Fukuoka, March 14–16, 2019, Student Encouragement Award [IPSJ Digital Library] (in Japanese).
Grants
Grant-in-Aid for JSPS Fellows: 22KJ2675 (2023－)- Grant-in-Aid for JSPS Fellows: 21J21729 (2021－2022)
- Grant-in-Aid for Scientific Research (A): 21H04916 (2021－)
- Grant-in-Aid for Scientific Research (A): 17H00737 (2018－2020)