BRDF estimation system for structural colors

Authors:
Ryo Shimada;Yoichiro Kawaguchi
Affiliations:
The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan;The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, Japan
Venue:
Proceedings of the 2005 international conference on Augmented tele-existence
Year:
2005

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Abstract

In this paper, we provide a shading algorithm for Structural Colors which can appear on micro surfaces. To approach a common algorithm for as many micro surfaces as possible, we modeled them out of polygons which have relative index of refraction. The algorithm calculates a surface's BRDF for each wevelength by ray tracing considering interference. Interference yield different BRDF between each wavelength, and we perceive it as structural colors. We simulated not only single thin film but also multilayered thin films as typical micro surfaces causing structural colors. We illustrated calculated BRDF in 3D computer graphics using environment mapping. Rendering results in our method indicate that it represent structural colors qualitatively.