Simulation of the BSDF measurement capabilities for various materials with GCMS-4 gonio-spectrophotometer
Dmitry Dmitrievich Zhdanov, Igor Stanislavovich Potemin, Вадим Соколов, A. A. Garbul’, Alexey Gennadievich Voloboy, Vladimir Alexandrovich Galaktionov · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2016
Physically accurate lighting simulation requires precise account of the optical properties (BSDF) which are usually measured using gonio-spectrophotometer. In this paper, the authors analyzed the accuracy of BSDF shape measured for later use of measurements in special software for photorealistic visualization and virtual prototyping. Visual and numerical analysis were done. In the first case we look at the sample image rendered under specified lighting conditions, replacing its properties on measurement results and visually estimate the similarity (or difference). In the second case we compare the results of simulation of spatial or angular radiance distribution with results of corresponding radiometric measurements.