Mechanisms of color constancy under nearly natural viewing
Mechanisms of color constancy under nearly natural viewing
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DOI：
10.1073/pnas.96.1.307
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发表时间：
1999-01-05
影响因子：
11.1
通讯作者：
Brainard, DH
中科院分区：
文献类型：
--
作者：
Kraft, JM;Brainard, DH
颜色恒常性是我们感知表面颜色不变的能力，尽管光照变化。虽然颜色恒常性已被广泛研究，但其机制仍在很大程度上未知。三个经典的假设是，恒定是通过局部适应，通过适应图像的空间平均值，或通过适应最强烈的图像区域来调节的。我们在接近自然的观看条件下测量颜色的稳定性，通过使用一种设计，允许我们直接测试这三个假设。通过适当的刺激操作，我们能够滴定恒定度在11%到83%之间，表明我们已经取得了良好的实验室控制。我们的结果排除了所有三个经典假设，因此表明，有更多的恒定比简单的视觉机制的作用可以很容易地解释。
Color constancy is our ability to perceive constant surface colors despite changes in illumination. Although color constancy has been studied extensively, its mechanisms are still largely unknown. Three classic hypotheses are that constancy is mediated by local adaptation, by adaptation to the spatial mean of the image, or by adaptation to the most intense image region. We measure color constancy under nearly natural viewing conditions, by using a design that allows us to test these three hypotheses directly. By suitable stimulus manipulation, we are able to titrate the degree of constancy between 11% and 83%, indicating that we have achieved good laboratory control. Our results rule out all three classic hypotheses and thus suggest that there is more to constancy than can be easily explained by the action of simple visual mechanisms.