Surface properties and the perception of color

We examined whether perception of color saturation and lightness depends on the three-dimensional (3D) shape surface gloss surfaces rendered to have different hues. In Experiment 1, we parametrically varied specular roughness predominantly planar with mesoscopic relief heights. The orientation was relative light source observer. Observers matched perceived chroma (effectively saturation) using spherical objects CIE LCH space. observed strong interactions between changes in properties (specular 3D height). Declines increases were increasing roughness. Changes height had greater effects for blue hues compared reddish greenish 2 found inverse correlations across conditions. 3 estimated coverage that a weighted combination could account lightness, coefficients accounting perceptual experience each three hue These findings suggest depend separation highlights from diffuse shading informative chromatic reflectance.