Conditions under which stereopsis and motion perception are blind.
We describe modified random-dot stereograms in which the corresponding elements differ from non-corresponding elements in colour, size, and luminance. Despite these visible differences between the elements, depth perception collapses when the spatially integrated luminous flux is similar for the corresponding and non-corresponding elements. Our results suggest that a low-pass spatial filter precedes the mechanism that recognises disparity. A similar phenomenon is observed for the perception of coherent motion in random-dot kinematograms. Our modified stereograms and kinematograms may find other uses when experimenters wish to study the contribution of colour to visual processes and require a method of eliminating edge artifacts.
Kim
Yong-Guk
YG
Department of Experimental Psychology, University of Cambridge, UK. ykim@sejong.ac.kr
Mollon
John D
JD
D000328:Adult; D003118:Color Perception; D003867:Depth Perception; D005260:Female; D006801:Humans; D008029:Lighting; D008297:Male; D009039:Motion Perception; D010775:Photic Stimulation / Q000379:methods; D015357:Vision Disparity