Contrast-transfer characteristics of n tuple models of retinal receptive fields

Contrast-transfer characteristics based on a simplified model of a retinal receptive field using a very limited number of receptors are described. The model is linear for given luminance levels. Of the many possible methods of switching these models, the one chosen uniformly changes the weighting coefficients associated with all receptors and is expressed as a change in static-transfer coefficient. Contrast-transfer characteristics are given as a function of optical-signal size (or spatial frequency) for various binary patterns. These characteristics may be used to select a compromise condition between the static- and contrast-transfer requirements of a pattern preprocessor, which in turn is a compromise between detectability and processing fidelity of signals.