颜色恒常性违反的并行检测。
Parallel detection of violations of color constancy.
作者信息
Foster D H, Nascimento S M, Amano K, Arend L, Linnell K J, Nieves J L, Plet S, Foster J S
机构信息
Visual and Computational Neuroscience Group, Department of Optometry and Neuroscience, University of Manchester Institute of Science and Technology, Manchester M60 1QD, United Kingdom.
出版信息
Proc Natl Acad Sci U S A. 2001 Jul 3;98(14):8151-6. doi: 10.1073/pnas.141505198.
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.
尽管照明光的光谱发生变化，但反射表面的感知颜色通常保持稳定。这种颜色恒常性可以通过要求观察者区分场景中光源的变化与构成该场景的表面反射特性的变化来进行操作性测量。本文表明，在快速的光源变化过程中，几乎可以独立于表面数量，轻松检测到其他表面阵列中一个或多个表面的光谱反射率同时发生的变化，这表明存在一种前注意的、空间并行的过程。在由解剖学中央凹界定的空间窗口内，这个过程是完美的，它可能构成表面颜色多阶段分析的早期输入，在生成更精细和稳定的感知表征之前，为视觉系统提供有关快速变化世界的信息。
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