Goddard Erin, Solomon Samuel, Clifford Colin
School of Psychology, The University of Sydney, Sydney, NSW, Australia.
J Vis. 2010 Dec 27;10(9):17. doi: 10.1167/10.9.17.
"Color constancy" refers to our ability to recognize the color of a surface despite changes in illumination. A range of cues and mechanisms, from receptoral adaptation to higher order cognitive cues, is thought to contribute to our color constancy ability. Here we used psychophysical adaptation to probe for an adaptable representation of surface color. We used stimuli that were matched for cone contrast when averaged over time but were consistent with either a constant scene under changing illumination or a changing scene. The color opponent aftereffect during adaptation to the constant scene was greater than that induced by the changing scene stimulus. Since the stimuli were matched for the responses they would elicit in receptoral mechanisms, the increased aftereffect in the constant scene condition cannot be wholly attributed to adaptation of receptors and neural mechanisms responsive to raw quantal catch. We interpret our result as most parsimoniously explained by the existence of adaptable mechanisms responsive to surface color, most likely located in early visual cortex.
“颜色恒常性”指的是我们在光照变化的情况下识别物体表面颜色的能力。从感受器适应到高阶认知线索，一系列的线索和机制被认为有助于我们的颜色恒常性能力。在这里，我们使用心理物理学适应来探究物体表面颜色的一种可适应表征。我们使用的刺激在时间平均上与锥体对比度相匹配，但与光照变化下的恒定场景或变化场景相一致。适应恒定场景期间的颜色对立后效大于变化场景刺激所诱发的后效。由于这些刺激在感受器机制中引发的反应是匹配的，因此在恒定场景条件下增加的后效不能完全归因于对原始量子捕获有反应的感受器和神经机制的适应。我们将我们的结果解释为最简洁的解释是存在对物体表面颜色有反应的可适应机制，很可能位于早期视觉皮层。
