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Rapid SVBRDF Measurement by Algebraic Solution Based on Adaptive Illumination

Summary

The bidirectional reflectance distribution function (BRDF) measured from a real object is one of the most important factors for photorealistic rendering. However, especially when spatially varying BRDFs (SVBRDF) are measured, not only the acquisitio time but also the estimation time become so long due to the need for an enormous number of reflectance samples and calculations.

In this research, we propose a measurement strategy using an algebraic solution that eliminates optimization and over-sampling, and an adaptive illumination system that satisfies the necessary constraints for the solution. As a result of demonstration, we confirmed the validity of this approach by comparison with conventional methods. The following figures show the developed system, a target (uneven glazed dish), SVBRDF parameter maps and the scene using measured SVBRDF of Japanese paper and gold ornament.



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Reference

  1. L. Miyashita, Y. Watanabe, M. Ishikawa : Rapid SVBRDF Measurement by Algebraic Solution Based on Adaptive Illumination, International Conference on 3D Vision (3DV2014), Posters, P1-20, Tokyo, Japan, 8-11 Dec. (2014)
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Ishikawa Watanabe Laboratory, Department of Information Physics and Computing, Department of Creative Informatics,
Graduate School of Information Science and Technology, University of Tokyo
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