Suppression of Luminance Contrast Sensitivity by Weak Color Presentation.

ABSTRACT: The results of psychophysical studies suggest that color in a visual scene affects luminance contrast perception. In our brain imaging studies we have found evidence of an effect of chromatic information on luminance information. The dependency of saturation on brain activity in the visual cortices was measured by functional magnetic resonance imaging (fMRI) while the subjects were observing visual stimuli consisting of colored patches of various hues manipulated in saturation (Chroma value in the Munsell color system) on an achromatic background. The results indicate that the patches suppressed luminance driven brain activity. Furthermore, the suppression was stronger rather than weaker for patches with lower saturation colors, although suppression was absent when gray patches were presen

SUBMITTER: Negishi I 

PROVIDER: S-EPMC8273178 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature