title: The Munker-White effect and chromatic induction share similar nonlinear response properties.
abstract: The brightness or color appearance of a region may be altered by the presence of a pattern surrounding it in the visual field. The Munker-White effect (grating surround) and brightness or color induction from concentric annuli ('bull's-eye' surround) are two examples. We examined whether these two phenomena share similar properties. In the asymmetric matching experiment, the task of an observer was to adjust the appearance of a matching patch to match the appearance of a test patch embedded in one of the two types (square wave grating or concentric annuli) of inducing surrounds (inducers). The inducer modulated in one of three color directions (isochromatic: +/-(L + M + S) and isoluminance: +/-(L - M) or +/-S). Each inducer type and color direction had two opposing phases and four contrast levels. The results show that the induced appearance shift increases as a power function of the inducer contrast, regardless of the spatial configuration of the inducer. Further analysis showed that a sensitivity modulation model of lateral interaction could explain both induction effects.
authors.affiliation: Department of Psychology, National Taiwan University, Taipei, Taiwan.
authors.forename: Yong-Jun
authors.initials: YJ
authors.lastname: Lin
authors.forename: Chien-Chung
authors.initials: CC
authors.lastname: Chen
authors.forename: Sarina Hui-Lin
authors.initials: SH
authors.lastname: Chien
mesh_terms: D003118:Color Perception / Q000502:physiology*; D015350:Contrast Sensitivity / Q000502:physiology*; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation