Influence of Depth of Surface in Stereoscopic Space on Color Appearance—A Preliminary Report—

Abstract

It was previously mentioned that a surface viewed by a stereoscope with binocular disparity might appear differently in color than when it was originally observed in two dimensions. In the present research we investigated whether brightness and/or chromaticness of a surface changed when it appeared with depth in a stereoscopic space. Test and matching stimuli were presented side by side on a CRT screen. These stimuli appeared in the surface-color mode except the yellow stimulus. The test stimulus was presented with front, back and 0 disparity from the standard plane, whereas the matching stimulus always appeared with 0 disparity. The observer adjusted luminance and chromaticities of the matching stimulus in order to obtain color-matching between the test and the matching stimuli. The results show that when the test stimulus appeared in front it looked brighter than at the standard position, and that when it appeared at back it looked almost the same. We proposed a color constancy hypothesis to explain the present results.