Numerical study of short-term afterimages and associate properties in foveal vision.
A cellular model of the primate retina has been developed. Unlike existing models, it incorporates spatial non-uniformities, such as the random arrangement of L and M cones, and the radial dilation with eccentricity. Based on a population of ganglion cell activities, colour-image representation is modelled with the luminance and the R-G opponent channels. The developed model reproduces experimentally known properties in temporal and spatial vision. Furthermore, spatio-temporally coupled properties such as transition from positive to negative phases in an afterimage, are recapped. In colour vision, the model can explain the insensitivity in our colour perception to the L/M cone ratio.
Momiji
Hiroshi
H
Department of Bioengineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK. h.momiji@imperial.ac.uk
Bharath
Anil A
AA
Hankins
Mark W
MW
Kennard
Christopher
C
D000360:Afterimage; D000818:Animals; D003118:Color Perception / Q000502:physiology; D003198:Computer Simulation; D015350:Contrast Sensitivity / Q000502:physiology; D005425:Flicker Fusion; D005584:Fovea Centralis / Q000502:physiology*; D006801:Humans; D008029:Lighting; D008960:Models, Psychological; D010775:Photic Stimulation; D011323:Primates / Q000502:physiology*; D011601:Psychophysics; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology*; D012165:Retinal Ganglion Cells / Q000502:physiology