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Volume: 28 | Article ID: art00058
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Simultaneous Measurement of BRDF and Surface Curvature by using Pattern Illumination
  DOI :  10.2352/issn.2169-2629.2020.28.57  Published OnlineNovember 2020
Abstract

In this study, we propose the simultaneous measurement method of the bidirectional reflection distribution function (BRDF) and the radius of curvature by using pattern illumination. For nonplanar objects, the angle of reflection light changes according to the surface normal angle of curved object. Therefore, it is necessary to consider the effects of curved surfaces when measuring the BRDF on non-planar surfaces. We suppose a convex surface that can be represented by a constant radius of curvature. The pattern of illumination was generated by placing the illumination mask with pattern apertures in the incident light path of the BRDF measurement apparatus in which the incident light is collimated light. We developed the measurement apparatus. We measured four types of sample with different BRDFs on three different radiuses of curvature. The results showed that the BRDF and the radius of curvature can be measured simultaneously by using the pattern illumination.

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Shinichi Inoue, Norimichi Tsumura, "Simultaneous Measurement of BRDF and Surface Curvature by using Pattern Illuminationin Proc. IS&T 28th Color and Imaging Conf.,  2020,  pp 356 - 360,  https://doi.org/10.2352/issn.2169-2629.2020.28.57

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Copyright © Society for Imaging Science and Technology 2020
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Color and Imaging Conference
color imaging conf
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Society for Imaging Science and Technology