RELATIONAL COLOR CONSTANCY FROM INVARIANT CONE-EXCITATION RATIOS
RELATIONAL COLOR CONSTANCY FROM INVARIANT CONE-EXCITATION RATIOS
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DOI：
10.1098/rspb.1994.0103
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发表时间：
1994-08-22
影响因子：
4.7
通讯作者：
NASCIMENTO, SMC
中科院分区：
文献类型：
--
作者：
FOSTER, DH;NASCIMENTO, SMC
感知色彩稳定性的定量测量表明，人类观察者在不同光源照射的场景中匹配彩色表面的能力有限且可变。然而，观察者可以在光源的变化和场景反射特性的变化之间做出快速而可靠的区分，这种区分能力可能是基于空间色彩关系的视觉编码。这种编码可以通过来自不同表面的光产生的锥光感受器激发的比率来提供：对于大类着色表面和具有随机光谱反射率的表面，这些比率在来自太阳和天空的光或来自普朗克辐射器的光照变化下，在统计上几乎是不变的。就色彩关系而言，锥体激发比提供了一种可能的（尽管不一定是唯一的）感知色彩恒常性的基础。
Quantitative measurements of perceptual colour constancy show that human observers have a limited and variable ability to match coloured surfaces in scenes illuminated by different light sources. Observers can, however, make fast and reliable discriminations between changes in illuminant and changes in the reflecting properties of scenes, a discriminative ability that might be based on a visual coding of spatial colour relations. This coding could be provided by the ratios of cone-photoreceptor excitations produced by light from different surfaces: for a large class of pigmented surfaces and for surfaces with random spectral reflectances, these ratios are statistically almost invariant under changes in illumination by light from the sun and sky or from a planckian radiator. Cone-excitation ratios offer a possible, although not necessarily unique, basis for perceptual colour constancy in so far as it concerns colour relations.