A temporal red-green opponent mechanism.

A mechanistic model is presented that describes the temporal behaviour of a red-green colour opponent channel such as has been investigated for the macaque monkey. The model incorporates luminance- and chromaticity-adaptation mechanisms. Receptive field properties such as retardation and attenuation of the surround signals with respect to the center signals of the colour opponent channel are also included. The model predicts temporal psychophysical chromaticity thresholds and temporal electrophysiological red-green colour opponent ganglion cell behaviour with a reasonable degree of success.