Surface gloss and color perception of 3D objects

Abstract

Two experiments explore the color perception of objects in complex scenes. The first experiment examines the color perception of objects across variation in surface gloss. Observers adjusted the color appearance of a matte sphere to match that of a test sphere. Across conditions we varied the body color and glossiness of the test sphere. The data indicate that observers do not simply match the average light reflected from the test. Indeed, the visual system compensates for the physical effect of varying the gloss, so that appearance is stabilized relative to what is predicted by the spatial average. The second experiment examines how people perceive color across locations on an object. We replaced the test sphere with a soccer ball that had one of its hexagonal faces colored. Observers were asked to adjust the match sphere have the same color appearance as this test patch. The test patch could be located at either an upper or lower location on the soccer ball. In addition, we varied the surface gloss of the entire soccer ball including the test patch!. The data show that there is an effect of test patch location on observers' color matching, but this effect is small compared to the physical change in the average light reflected from the test patch across the two locations. In addition, the effect of glossy highlights on the color appearance of the test patch was consistent with the results from Experiment 1.

Understanding the role of phase function in translucent appearance

“…Most previous research in the perception of material properties has focused on opaque surfaces, and color and lightness in particular (e.g., [Brainard and Maloney 2011;Xiao and Brainard 2008]). There have also been numerous studies of the perception of gloss, with results suggesting that realworld lighting is important for perception [Fleming et al 2003]; while simple image statistics correlate with perceived gloss in some situations [Nishida and Shinya 1998;Motoyoshi et al 2007;Sharan et al 2008], other situations seem to require explicit reasoning about the three-dimensional scene geometry [Kim and Anderson 2010;Marlow et al 2011].…”

Appearance of Gold, Silver and Copper Colors of Glossy Object Surface

“…In some cases, color names used for surfaces depend on reflectance properties, such as yellow for a mat surface but gold color for a glossy surface, even though the chromaticity of these surfaces is the same. It is necessary to study color appearance of material with non-uniform reflectance in order to fully understand surface color perception [1][2][3].…”

CIECAM02 and Perception of Colour in 3D Computer Generated Graphics

“…Matematičnih poenostavitev pri računanju optičnih pojavov je tukaj zelo malo (statistične poenostavitve). Ta metoda daje popoln fotorealizem, vendar še ni časovno optimizirana [47].…”