Information limits on identification of natural surfaces by apparent colour
Information limits on identification of natural surfaces by apparent colour
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DOI：
10.1068/p5181
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发表时间：
2005-01-01
期刊：
影响因子：
1.7
通讯作者：
Amano, K
中科院分区：
文献类型：
--
作者：
Foster, DH;Nascimento, SMC;Amano, K
通过自适应和其他机制，视觉系统可以补偿场景上照明颜色的适度变化。虽然大多数表面的颜色被认为是恒定的（颜色恒定性），但有些不是。这些残余颜色变化对观察者通过其表观颜色识别表面的能力的影响从理论上从不同日光下的自然场景的高分辨率高光谱图像中确定，相关色温为4 300 K，6 500 K和25 000 K。感知颜色之间的差异估计与近似均匀的颜色距离措施。在光源变化下保存的信息随着样品中表面的数量而增加，但仅限于相对较低的渐近值，表明物理因素在约束识别表观颜色中的重要性。
By adaptational and other mechanisms, the visual system can compensate for moderate changes in the colour of the illumination on a scene. Although the colours of most surfaces are perceived to be constant (colour constancy'), some are not. The effect of these residual colour changes on the ability of observers to identify surfaces by their apparent colour was determined theoretically from high-resolution hyperspectral images of natural scenes under different daylights with correlated colour temperatures 4 300 K, 6 500 K, and 25 000 K. Perceived differences between colours were estimated with an approximately uniform colour-distance measure. The information preserved under illuminant changes increased with the number of surfaces in the sample, but was limited to a relatively low asymptotic value, indicating the importance of physical factors in constraining identification by apparent colour.