Lightness constancy: A direct test of the illumination-estimation hypothesis
Lightness constancy: A direct test of the illumination-estimation hypothesis
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DOI：
10.1111/1467-9280.00426
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发表时间：
2002-03-01
影响因子：
8.2
通讯作者：
Brainard, DH
中科院分区：
文献类型：
--
作者：
Rutherford, MD;Brainard, DH
许多颜色恒常性的模型假设视觉系统估计场景光源，并使用此估计来确定对象的颜色外观。一个版本的照明估计假设，其中的光源估计与明确感知的光源，进行了测试。观察员在两个实验室之间进行了外观匹配。观察者调整一个腔室中的照明以匹配另一个腔室中的照明，然后调整一个腔室中的测试贴片以匹配另一个腔室中的贴片的表面亮度。照明估计假设，如这里所制定的，预测在两个匹配之后，从测试贴片反射的光的亮度将是相同的。数据与这一预测相矛盾。第二个实验表明，操纵测试片的直接周围可以影响感知的亮度，而不影响感知的照明。这一发现也证伪了照明估计假说。
Many models of color constancy assume that the visual system estimates the scene illuminant and uses this estimate to determine an object's color appearance. A version of this illumination-estimation hypothesis, in which the illuminant estimate is associated with the explicitly perceived illuminant, was tested. Observers made appearance matches between two experimental chambers. Observers adjusted the illumination in one chamber to match that in the other and then adjusted a test patch in one chamber to match the surface lightness of a patch in the other The illumination-estimation hypothesis, as formulated here, predicted that after both matches the luminances of the light reflected from the test patches would be identical. The data contradict this prediction. A second experiment showed that manipulating the immediate surround of a test patch can affect perceived lightness without affecting perceived illumination. This finding also falsifies the illumination-estimation hypothesis.