Author:

Keywords:

simultaneous colour contrast, gamut expansion effect, perceptual transparency, colour scission, perceptual organization, Social Sciences, Psychology, Experimental, Psychology, GESTALT PSYCHOLOGY, CONTRAST, TRANSPARENCY, 1701 Psychology, 1702 Cognitive Sciences, 5202 Biological psychology, 5204 Cognitive and computational psychology

Abstract:

In the well-known gamut expansion effect, uniformly coloured target patches are perceived as more colourful when they are embedded in a uniform grey surround than when they are embedded in a variegated one. Here, we provide a demonstration showing that this effect can be inverted when the uniformly coloured target patches are replaced by variegated ones. This observation suggests that the gamut expansion effect is due to mechanisms of transparency perception rather than due to contrast adaptation.