Detection of contrary chromatic change.
In visual search experiments we examined whether targets that are distinguished from distracting items solely by a contrary change in color can be sought spatially in parallel. Targets under time-varying illumination pop out if they present a contrary luminance signal; targets under space-varying illumination can be detected in parallel when they are isoluminant. The results suggest that neurons with spatially and chromatically opposed receptive fields are active across the central visual field.
D'Zmura
M
M
Department of Cognitive Sciences, University of California, Irvine 92717.
Mangalick
A
A
D003118:Color Perception / Q000502:physiology*; D006801:Humans; D008027:Light; D009474:Neurons / Q000502:physiology; D014793:Visual Cortex / Q000502:physiology; D014794:Visual Fields / Q000502:physiology