Tyler Christopher W, Solomon Joshua A
City University of London, London, UK.
Iperception. 2018 May 7;9(3):2041669518768829. doi: 10.1177/2041669518768829. eCollection 2018 May-Jun.
It is popular to attribute the appearance of extended colour fields to a process of filling-in from the differential colour signals at colour edges, where one colour transitions to another. We ask whether such a process can account for the appearance of extended colour fields in natural images. Some form of colour filling-in must underlie the equiluminant colour Craik-O'Brien-Cornsweet effect and the Watercolour Effect, but these effects are too weak to account for the appearance of extended colour fields in natural images. Moreover, the graded colour disappearance effect reported as evidence for colour filling-in does not work under natural viewing conditions. We demonstrate that natural images do not look very colourful when their colour is restricted to edge transitions. Moreover, purely chromatic images with maximally graded (edgeless) transitions look fully colourful. Consequently, we conclude that colour filling-in makes no more than a minor contribution to the appearance of extended colour regions in natural images.
人们普遍认为，扩展色域的出现是由于在颜色边缘（即一种颜色过渡到另一种颜色的地方）根据不同的颜色信号进行填充的过程。我们要问的是，这样一个过程是否能解释自然图像中扩展色域的出现。某种形式的颜色填充必定是等亮度颜色的Craik-O'Brien-Cornsweet效应和水彩效应的基础，但这些效应太微弱，无法解释自然图像中扩展色域的出现。此外，作为颜色填充证据而报道的渐变颜色消失效应在自然观看条件下并不起作用。我们证明，当自然图像的颜色仅限于边缘过渡时，它们看起来并不十分鲜艳。此外，具有最大渐变（无边缘）过渡的纯彩色图像看起来色彩鲜艳。因此，我们得出结论，颜色填充对自然图像中扩展颜色区域的外观所起的作用微乎其微。
