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.

Results of visuual simulation of opal using three-dimensional Voronoi tessellation

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.

Control of internal colors by specifying the particle size of silica spheres

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
Shumpei Sugita Keio University

 

Publications

 

Journals

  1. Soma YokotaShumpei SugitaIssei 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

  1. Soma YokotaShumpei SugitaIssei 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

  1. Soma YokotaIssei 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).
  2. Soma YokotaShumpei SugitaIssei 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 (in Japanese).
  3. 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).
  4. 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).

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