Perceived duration of chromatic and achromatic light
Perceived duration of chromatic and achromatic light
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彩色光和消色差光的感知持续时间
DOI：
10.1016/j.visres.2011.11.006
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发表时间：
2012
期刊：
影响因子：
1.8
通讯作者：
H
中科院分区：
文献类型：
--
作者：
Kojima;H
亮度和颜色信息被认为是在并行系统中处理的。来自这两个独立系统的信息的整合对于视觉系统产生一致的感知至关重要。为了研究亮度和彩色光是如何在时间上被感知的，我们测量了有颜色和没有颜色的光刺激的感知持续时间，该范式包括同时感知和呈现两个连续的刺激帧。用色度替代技术设置刺激的亮度对比度和颜色对比度。在实验1中，彩色刺激和非彩色刺激的感知时长都随着亮度对比度的降低而增加。实验2测试了当亮度对比度被设置得尽可能低时，知觉的持续时间是否受到颜色对比度的影响，颜色对比度由刺激的颜色纯度定义。结果表明，知觉持续时间随刺激颜色对比度的增加而缩短。此外，实验3表明，如果刺激的有效颜色对比度基于对颜色的对比敏感度进行校正，则感知持续时间的趋势与四种原色一致。这些实验表明，在高亮度对比度水平下，刺激的感知持续时间主要由亮度对比度定义，而在低亮度对比度条件下，持续时间取决于颜色对比度。颜色刺激的感知持续时间显示出一种“反色对比效应”，类似于众所周知的亮度刺激的“反转强度效应”。文中进一步讨论了这两种系统的异同，以及它们在处理视觉刺激时间信息方面的优先顺序。
Luminance and color information are considered to be processed in parallel systems. The integration of information from these two separate systems is crucial for the visual system to produce a coherent percept. To investigate how luminance and color lights are perceived in time, we measured the perceived duration of light stimuli with and without colors in a paradigm involving simultaneous perception with presentation of two successive stimulus frames. Luminance contrast and color contrast of the stimuli were set with a chromatic substitution technique. In Experiment 1, the perceived duration of both chromatic stimuli and achromatic stimuli increased as the luminance contrast decreased. Experiment 2 tested if the duration of the percept was influenced by color contrast which was defined by colorimetric purity of the stimuli, when luminance contrast was set as low as practically possible. The result showed that the duration of the percept decreased with increasing color contrast of the stimuli. Moreover, Experiment 3 demonstrated that the trend of perceived duration was consistent with the four primary colors, provided that the effective color contrast of stimulus was corrected based on the contrast sensitivity to the color. These experiments indicate that, with a high luminance contrast level, perceived duration of a stimulus is predominantly defined by luminance contrast, whereas in low luminance contrast conditions, the duration depends on the color contrast. The perceived duration of color stimuli showed an “inverse color contrast effect”, similar to the well-known “inverse intensity effect” for luminance stimuli. The similarities and the differences between the two systems, as well as their priorities in processing temporal information of visual stimuli are further discussed.