Parallel detection of violations of color constancy
Parallel detection of violations of color constancy
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DOI：
10.1073/pnas.141505198
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发表时间：
2001-07-03
影响因子：
11.1
通讯作者：
Foster, JS
中科院分区：
文献类型：
--
作者：
Foster, DH;Nascimento, SMC;Foster, JS
反射表面的感知颜色通常保持稳定，尽管照明光的光谱发生变化。这种颜色恒定性可以通过要求观察者区分场景上的光源变化与包含它的表面的反射特性的变化来操作地测量。这里示出了在快速光源变化期间，可以容易地检测到几乎与表面的数量无关的其他表面阵列中的一个或多个表面的光谱反射率的同时变化，空间平行过程这个过程，这是完美的空间窗口界定的解剖凹，可能会形成一个早期的输入到表面颜色的多级分析，提供了一个快速变化的世界的视觉系统的信息之前，产生一个更精细和稳定的感知表示。
The perceived colors of reflecting surfaces generally remain stable despite changes in the spectrum of the illuminating light. This color constancy can be measured operationally by asking observers to distinguish illuminant changes on a scene from changes in the reflecting properties of the surfaces comprising it. It is shown here that during fast illuminant changes, simultaneous changes in spectral reflectance of one or more surfaces in an array of other surfaces can be readily detected almost independent of the numbers of surfaces, suggesting a preattentive, spatially parallel process. This process, which is perfect over a spatial window delimited by the anatomical fovea, may form an early input to a multistage analysis of surface color, providing the visual system with information about a rapidly changing world in advance of the generation of a more elaborate and stable perceptual representation.