The watercolor effect: Quantitative evidence for luminance-dependent mechanisms of long-range color assimilation

被引:43
作者
Devinck, F
Delahunt, PB
Hardy, JL
Spillmann, L
Werner, JS
机构
[1] Univ Calif Davis, Dept Ophthalmol & Visual Sci, Sect Neurobiol Physiol & Behav, Sacramento, CA 95817 USA
[2] Univ Freiburg, Brain Res Unit, D-79104 Freiburg, Germany
关键词
watercolor effect; assimilation; color spreading; long-range interactions;
D O I
10.1016/j.visres.2004.11.024
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
When a dark chromatic contour delineating a figure is flanked on the inside by a brighter chromatic contour, the brighter color will spread into the entire enclosed area. This is known as the watercolor effect (WCE). Here we quantified the effect of color spreading using both color-matching and hue-cancellation tasks. Over a wide range of stimulus chromaticities, there was a reliable shift in color appearance that closely followed the direction of the inducing contour. When the contours were equated in luminance, the WCE was still present, but weak. The magnitude of the color spreading increased with increases in luminance contrast between the two contours. Additionally, as the luminance contrast between the contours increased, the chromaticity of the induced color more closely resembled that of the inside contour. The results support the hypothesis that the WCE is mediated by luminance-dependent mechanisms of long-range color assimilation. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1413 / 1424
页数:12
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