title: Color contrast under controlled chromatic adaptation reveals opponent rectification.
abstract: Color contrast was assessed in the equiluminant plane using asymmetric matching. Test and surround stimuli lay on cardinal axes of a cone opponent chromaticity space, (l-lw, s-sw). Matches were made as a function of both test and surround chromaticity. Some matches showed constant maximal induction consistent with retinal adaptation to the surround; others showed constant minimal induction. These matches were separated by a hiatus in which color appearance did not vary greatly with test chromaticity. The results suggest that rectified retinal spectral opponent pathways do not form a unitary chromatic opponent pathway but are subject to pathway-specific interactions.
authors.affiliation: Visual Sciences Center, University of Chicago, Illinois, USA.
authors.forename: V C
authors.initials: VC
authors.lastname: Smith
authors.forename: J
authors.initials: J
authors.lastname: Pokorny
mesh_terms: D000221:Adaptation, Ocular / Q000502:physiology*; D000328:Adult; D003118:Color Perception / Q000502:physiology*; D004192:Discrimination, Psychological / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008959:Models, Neurological; D013053:Spectrophotometry