Summary
Opal is a mineraloid which has a distinctive optical effect: ‘play of color,’ and it has been utilized
for a gemstone because it displays beautiful and complex iridescent patterns in itself. Visual simulation of
play of color is in demand from a viewpoint of designing the texture of gemstones.
In this study, we propose a new method for modeling the internal structure of opal using three-dimensional Voronoi tessellation, which attempts to display patterns based on crystallography.
Classification of this study
This study is far from phenomenological modeling because it does not use a method to infer the internal structure from the pattern of `play of color.’
Although approximating the internal structure of opal using Voronoi diagrams reduces the amount of time and space required for calculations, the model is based on crystallography, so it can be said to have a stronger physical aspect than an artificial aspect.
Members
| Name | Affiliation | Web site |
|---|---|---|
 Soma Yokota |
Keio University |
Publications
Journals
- Soma Yokota, Issei Fujishiro: “Visual simulation of opal using bond percolation through the weighted Voronoi diagram and the Ewald construction,” The Visual Computer, Vol 40, pp. 5005-5016, July 2024. [online journal]
- Soma Yokota，Shumpei Sugita，Issei Fujishiro: “Modeling of Opal Using 3D Voronoi Tessellation for Simulating Play of Color,” The Journal of the Institute of Image Electionics Engineers of Japan, Vol. 52, No. 1, pp.174-182, January 2023 (in Japanese). [online journal]
Presentations
Domestic presentations with screening
- Soma Yokota, Issei Fujishiro: “Visual simulation of opal using bond percolation through the weighted Voronoi diagram and the Ewald construction,” Computer Graphics International 2024, Campas Biotech, Geneva, July 1-5, 2024.
- Soma Yokota，Shumpei Sugita，Issei Fujishiro: “Visual Simulation of Opal Using 3D Voronoi Diagram -Reproduction of Play of Color-,” in Proceedings of Visual Computing 2022, Kyoto International Conference Center, Kyoto, pp. 17:1-17:6, October 6-8, 2022, Polyphony Digital Award, CGVI Best Presentation Award, CGVI Student Presetntation Award (in Japanese).
Domestic presentations without screening
- Soma Yokota，Issei Fujishiro: “Opal rendering utilizing reciprocal space,” The 2nd Vision, Graphics and Sensing Workshop, April 19, 2024 (in Japanese).
- Soma Yokota，Issei Fujishiro: “Visual simulation of opal—Representation of sintering and efficient search of diffracted ray direction—,” in Proceedings of SIG Technical Reports, Vol. 2023–CG–193, No. 11, pp. 1–6, March 18–19, 2024, Best Presentation Award (in Japanese).
- Soma Yokota，Issei Fujishiro: “Modeling of Internal Structure of Opal Using 3D Additively Weighted Voronoi Tessellation,” in Proceedings of Visual Computing Workshop 2022, 8, November 25–26, 2022 [Abstract: The Journal of the Institute of Image Electionics Engineers of Japan, Vol. 52, No. 1, p. 248, January 2023] (in Japanese).
- Soma Yokota，Shumpei Sugita，Issei Fujishiro: “Modeling of Opal Using 3D Voronoi Tessellation for Simulating Play of Color,” in Proceedings of Media Computing Conference 2022, Shiretoko, S10-3，pp. 1-6, September 2, 2022 Young Resercher Award (in Japanese).
- Soma Yokota, Shumpei Sugita, Issei Fujishiro: “Visual Simulation of ‘Play of color’ Observed in Opal Using Voronoi-tessellation Model,” in Proceedings of SIG Technical Reports, Online, Vol. 2022–CG–185, No. 3, pp. 1-6, March 11-12,2022 (in Japanese).
- Soma Yokota, Issei Fujishiro: “Voronoi Tessellation-based Opal Modeling for Visual Simulation of Play of Color,” in Proceedings of the 84th National Convention of Information Proceedings Society of Japan, Ehime University Johoku Campas, Ehime, March 3-5, 2022, Vol. 4, pp. 355-356 (7ZG–02), Student Encouragement Award (in Japanese).