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轮廓自适应减少了边缘诱导颜色的扩散。

Contour adaptation reduces the spreading of edge induced colors.

作者信息

Coia Andrew J, Crognale Michael A

机构信息

University of Nevada Reno, Psychology Department, 1664 N Virginia St, Reno, NV 89557, United States.

University of Nevada Reno, Psychology Department, 1664 N Virginia St, Reno, NV 89557, United States.

出版信息

Vision Res. 2018 Oct;151:135-140. doi: 10.1016/j.visres.2017.01.009. Epub 2017 Apr 25.

Abstract

Brief exposure to flickering achromatic outlines of an area causes a reduction in the brightness contrast of the surface inside the area. This contour adaptation to achromatic contours does not reduce surface contrast when the surface is chromatic (the saturation or colorimetric purity of the surface is maintained). In addition to reducing the brightness of physical luminance contrast, contour adaptation also reduces (or even reverses) the illusory brightness contrast seen in the Craik-O'Brien-Cornsweet illusion, in which two physically identical grey areas appear different brightness because of a sharp luminance edge separating them. Chromatic color spreading illusions also occur with chromatic inducing edges, and an unanswered question is whether contour adaptation can reduce the perceived contrast of illusory color spreading from edges, even though it cannot reduce the perceived contrast of physical surface color. The current studies use a color spreading illusion known as the watercolor effect in order to test whether illusory color spreading is affected by contour adaptation. The general findings of physical achromatic contrast being reduced and chromatic contrast being robust to contour adaptation were replicated. However, both illusory brightness and color were reduced by contour adaptation, even when the illusion edges only differed in chromatic contrast with each other and the background. Additional studies adapting to chromatic contours showed opposite effects on illusory color contrast than achromatic adaptation.

摘要

短暂暴露于某区域闪烁的消色差轮廓会导致该区域内表面的亮度对比度降低。当表面为彩色时(表面的饱和度或色度纯度保持不变),这种对消色差轮廓的轮廓适应不会降低表面对比度。除了降低物理亮度对比度的亮度外,轮廓适应还会降低(甚至反转)在Craik-O'Brien-Cornsweet错觉中看到的虚幻亮度对比度,在这种错觉中,两个物理上相同的灰色区域由于将它们分开的尖锐亮度边缘而显得亮度不同。彩色诱导边缘也会出现彩色扩散错觉,一个未解决的问题是,轮廓适应是否能降低从边缘感知到的虚幻颜色扩散的对比度,尽管它不能降低物理表面颜色的感知对比度。当前的研究使用一种称为水彩效应的颜色扩散错觉来测试虚幻颜色扩散是否受轮廓适应的影响。物理消色差对比度降低而彩色对比度对轮廓适应具有鲁棒性这一总体发现得到了重复验证。然而,即使错觉边缘彼此之间以及与背景仅在颜色对比度上有所不同,轮廓适应也会降低虚幻亮度和颜色。适应彩色轮廓的其他研究表明,与消色差适应相比,对虚幻颜色对比度有相反的影响。

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