Rinner Oliver, Gegenfurtner Karl R
Max-Planck-Institut für biologische Kybernetik, Tübingen, Germany.
Perception. 2002;31(6):733-46. doi: 10.1068/p3352.
Colour constancy refers to the stable perception of object colour under changing illumination conditions. This problem has been reformulated as relational colour constancy, or the ability of the observer to discriminate between material changes and changes in illumination. It has been suggested that local cone excitation ratios play a prominent role in achieving such constancy. Here we show that perceptual colour constancy measured by achromatic adjustments is to a large part complete after 25 ms. This speaks against a prominent role for receptor adaptation, which takes significantly longer. We also found no difference in colour constancy between colour changes that were compatible with a change of illuminant, and between colour changes where local cone ratios were uncorrelated between the two illuminants. Our results show that constant cone ratios are not necessary for colour constancy.
颜色恒常性是指在不断变化的光照条件下对物体颜色的稳定感知。这个问题已被重新表述为关系性颜色恒常性，即观察者区分材质变化和光照变化的能力。有人提出局部视锥细胞激发比率在实现这种恒常性方面起着重要作用。在这里，我们表明通过消色差调整测量的感知颜色恒常性在25毫秒后大部分已经完成。这与受体适应的重要作用相悖，因为受体适应所需时间长得多。我们还发现，与光源变化兼容的颜色变化之间，以及两种光源下局部视锥细胞比率不相关的颜色变化之间，颜色恒常性没有差异。我们的结果表明，恒定的视锥细胞比率对于颜色恒常性并非必要。
