抄録
To estimate shape from shading, the relationship between image intensity and surface orientation, reflectance map, is required. In this study, subjects estimated the slant perceived from images of cylinders. The reflectance map used by the visual system was estimated from the relationship between the perceived slant and stimulus image intensity. Results suggest that the visual system can modify the assumptions undertying the reflectance map, surface reflectance properties, illuminant intensity, and ambient light.
