title: Opponent-color models and the influence of rod signals on the loci of unique hues.
abstract: To investigate how rod signals influence hue perception and how this influence can be incorporated into opponent-color models, we measured the shift of unique-hue loci under dark-adapted conditions compared with cone-plateau conditions. Rod signals produced shifts of all spectral unique hues (blue, green, yellow) but in a pattern that was inconsistent with simple additive combinations of rod and cone inputs in opponent-color models. The shifts are consistent with non-linear models in which rod influence requires non-zero cone signals. Cone-signal strength may modulate or gate rod influence, or rod signals may change the gain of cone pathways.
authors.affiliation: Department of Psychology, University of Washington, PO Box 351525, 98195, Seattle, WA, USA. sbuch@u.washington.edu
authors.forename: S L
authors.initials: SL
authors.lastname: Buck
authors.forename: R F
authors.initials: RF
authors.lastname: Knight
authors.forename: J
authors.initials: J
authors.lastname: Bechtold
mesh_terms: D000221:Adaptation, Ocular / Q000502:physiology; D000328:Adult; D003118:Color Perception / Q000502:physiology*; D003119:Color Perception Tests / Q000379:methods; D005260:Female; D006801:Humans; D008029:Lighting; D008297:Male; D008875:Middle Aged; D017711:Nonlinear Dynamics; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology*; D017948:Retinal Rod Photoreceptor Cells / Q000502:physiology*