Re ectance and Texture of Real World Surfaces

In this work we investigate the visual appearance of real world surfaces and the dependence of appearance on imaging conditions We present a BRDF bidirec tional re ectance distribution function database with re ectance measurements for over di erent samples each observed with over di erent combinations of viewing and source directions We t the BRDF mea surements to two recent models to obtain a BRDF pa rameter database These BRDF parameters can be di rectly used for both image analysis and image synthe sis Finally we present a BTF bidirectional texture function database with image textures from over di erent samples each observed with over di erent combinations of viewing and source directions Each of these unique databases has important implications for a variety of vision algorithms and each is made publicly available