Color constancy in the nearly natural image. 2. Achromatic loci
Color constancy in the nearly natural image. 2. Achromatic loci
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DOI：
10.1364/josaa.15.000307
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发表时间：
1998-02-01
影响因子：
1.9
通讯作者：
Brainard, DH
中科院分区：
文献类型：
--
作者：
Brainard, DH
大多数关于颜色恒常性的经验性工作是基于自然观察条件的简单实验室模型。这些通常由在均匀背景下看到的斑点或在空间均匀照明下看到的平面的计算机模拟组成。在这项研究中，测量是在更自然的观察条件下进行的。观察者使用投影色度计来调整测试贴片的外观，直到它出现消色差。观察者在各种光源下以及在许多不同背景下观察测试表面时进行了这种消色差设置。消色差设置的分析表明，观察者表现出良好的颜色恒常性时，照明变化。另一方面，改变测试斑块所看到的背景表面对消色差位点的影响相对较小。因此，结果表明，恒定性不是通过简单的比较测试表面和它的局部周围。(C)1998年美国光学学会。
Most empirical work on color constancy is based on simple laboratory models of natural viewing conditions. These typically consist of spots seen against uniform backgrounds or computer simulations of flat surfaces seen under spatially uniform illumination. In this study measurements were made under more natural viewing conditions. Observers used a projection colorimeter to adjust the appearance of a test patch until it appeared achromatic. Observers made such achromatic settings under a variety of illuminants and when the test surface was viewed against a number of different backgrounds. An analysis of the achromatic settings reveals that observers show good color constancy when the illumination is varied. Changing the background surface against which the test patch is seen, on the other hand, has a relatively small effect on the achromatic loci. The results thus indicate that constancy is not achieved by a simple comparison between the test surface and its local surround. (C) 1998 Optical Society of America.