両眼視情報とキャストシャドウによる奥行き知覚の相互作用

抄録

A cast-shadow occurs on a floor when an object occludes illumination fromabove. It is known that, in two-dimensional picture, this shadow has important role for depth perception between the object and the floor. Here, we investigated the interaction of perceived depths by binocular cues(binocular disparity and vergence) and cast-shadow. The results rejected the winner-take-all model where binocular cues override cast-shadow, andindicated that both can work for depth perception. To account well for the data, we adopted modified linear combination model for light source directions which subjects assume. They are significant knowledge not only gor bringing visual processing of depth perception into the open, but also for making three-dimensional computher graphics.