The performance of color constancy, the human ability to perceive constant surface colors despite illuminant changes, was ordinarily higher in real scenes than computer images. We investigated whether binocular disparity contributed to the high performance. In our experiments, the performance of color constancy in real scenes were compared among three viewing conditions containing different disparity information; (1) binocular, (2) monocular, and (3) through synopter (where binocular disparity was zero). The results showed that the performance of color constancy was higher in the binocular condition than the other two, suggesting that binocular disparity improves color constancy in real scenes. Furthermore, we performed another experiment under multiple illuminants with different colors, investigating the role of binocular disparity in estimating special distribution of illuminant colors to accomplish color constancy.%照明変化によらない安定した表面色を知覚する人間の視覚特性,色恒常性は,一般的にコンピュータ画像よりも実物体環境において高い成立度合いを示す.本研究ではその要因が両眼視差の働きにあるのかを検討した.実験では,実物体環境における両眼視差を操作するため,両眼視,単眼視,そしてシノプタ一視(両眼視差はゼロとなる)の3種類の視環境を用いて,色恒常性の成立度合いを比較した.その結果,両眼視条件において,他の条件よりも高い色恒常性の成立度合いが示され,実物体環境における両眼視差が色恒常性を向上させることが示唆された.さらに,異なる色温度の複数照明が存在する環境下の実験も行い,色恒常性成立のための空間的な照明光分布推定における両眼視差の役割を検討した.
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