2012 Volume 2012 Pages 204-210
BRDF measurement generally require delicate instruments and complex measuring processes for obtaining geometrical information of viewer, light source and surface. In this paper, a novel approach is developed to evaluate reflectance properties such as specular or diffuse albedos by applying Independent Component Analysis (ICA) to the images obtained by changing the orientation of the light source. Surface roughness is also evaluated as a relative value by using separated specular images. The proposed approach does not require any geometrical information and is very suitable for the materials whose diffuse and specular components have obvious differences, such as metal. The evaluated reflectance properties can be applied to rendering, diffuse-specular separation, 3D measurement of metallic surface or design of various kinds of image processing algorithms.
