Influence of luminance flicker and purity on heterochromatic brightness matching and hue discrimination: A postreceptoral opponent process

We have studied psychophysically the characteristics of the postreceptoral stage of visual processing, using heterochromatic brightness matching (HBM) between 540 and 600 nm, and hue discrimination between 565 and 585 nm, under differing luminance flicker (0-30 Hz) and excitation purity (1.0-0.1) co...

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Bibliographic Details
Published in:Vision research (Oxford) 1997-03, Vol.37 (6), p.721-728
Main Authors: KURTENBACH, A, RÜTTIGER, L, KAISER, P. K, ZRENNER, E
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Color Perception - physiology
Discrimination (Psychology)
Fundamental and applied biological sciences. Psychology
Humans
Light
Male
Perception
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychophysics
Spectrophotometry
Time Factors
Vision
Vision, Monocular - physiology
Visual Pathways
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Summary:We have studied psychophysically the characteristics of the postreceptoral stage of visual processing, using heterochromatic brightness matching (HBM) between 540 and 600 nm, and hue discrimination between 565 and 585 nm, under differing luminance flicker (0-30 Hz) and excitation purity (1.0-0.1) conditions. The HBM curves exhibit deeper minima around 575 nm with decreasing purity. The minimum is generally most pronounced with a 3 Hz flicker and least pronounced with a 30 Hz flicker. Hue discrimination ability is relatively insensitive to flicker and deteriorates at the lower purities. The HBM results for low purities can be explained by the upper envelope of activities in PC- and MC-pathways.
ISSN:0042-6989
1878-5646
DOI:10.1016/s0042-6989(96)00203-9