Matching illumination of solid objects From: Perception and Psychophysics | Date: April 1, 2007| Author: | Copyright Psychonomic Society, Inc. Apr 2007. Provided by ProQuest LLC.Copyright information

The appearance of objects is determined by their surface reflectance and roughness and by the light field. Conversely, human observers might derive properties of the light field from the appearance of objects. The inverse problem has no unique solution, so perceptual interactions between reflectance, roughness, and light field are to be expected. In two separate experiments, we tested whether observers are able to match the illumination of spheres under collimated illumination only (matching of illumination direction) and under more or less diffuse illumination (matching of illumination ...

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