Parabolic achromatic color matching functions: Dependence on incremental and decremental luminance

Author:

Rudd Michael E.1ORCID,Kavcar Osman1,Crognale Michael A.1

Affiliation:

1. University of Nevada

Abstract

Either the brightness or lightness of a disk surrounded by an annulus is characterized in the most general case by a parabolic function of the annulus luminance when plotted on a log–log scale. This relationship has been modeled with a theory of achromatic color computation based on edge integration and contrast gain control [J. Vis. 10, 1 (2010)1534-736210.1167/10.14.40]. We tested predictions of this model in new psychophysical experiments. Our results support the theory and reveal a previously unobserved property of parabolic matching functions that depends on the disk contrast polarity. We interpret this property in terms of a neural edge integration model incorporating data from macaque monkey physiology that indicates different physiological gain factors for incremental and decremental stimuli.

Funder

National Institute of General Medical Sciences

Publisher

Optica Publishing Group

Subject

Computer Vision and Pattern Recognition,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

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