Spatio-temporal model for subjective colours based on colour coded ganglion cells.
We propose a mathematical model for the generation of the subjective colour phenomenon through Benham's disk stimuli. The model relates to the spatial and temporal properties of three colour coded retinal ganglion cells: L+/M-, M+/L- and S-/(L+M)+ [or (L+M)-/S+]. It is suggested that the phenomenon is based on both the opponent mechanisms in the cells' receptive fields, and the "rebound response"--a common cell response to turning off of an inhibitory stimulus (nonlinear cell dynamics). A physiological mechanism is suggested for this response. The integrated cell responses to Benham disk-stimuli create imbalances between the colour pathways that are interpreted as actual colours. The model also predicts the shift in the perceived colours when the disk rotation rate is varied.
Grunfeld
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ED
Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv University, Israel.
Spitzer
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H
D003118:Color Perception / Q000502:physiology*; D006801:Humans; D008433:Mathematics; D008959:Models, Neurological; D009433:Neural Inhibition; D009903:Optical Illusions / Q000502:physiology; D012165:Retinal Ganglion Cells / Q000502:physiology*; D012399:Rotation; D013997:Time Factors