Separating Diffuse and Specular Reflection Components Based-on Surface Color Ratio and Chromaticity

A method to separate diffuse and specular reflection components is presented. The method is based on color, particularly on surface color ratio and chromaticity. We define surface color ratio as an invariant to specularity, shading and shadow and use it to detect diffuse pixels. There are three principle steps in our method: diffuse pixels identification, image normalization and reflection components separation. The experimental results show that the proposed method is very accurate and robust for uniform colored dielectric inhomogeneous surfaces under single colored scene illumination.