A transducer function for threshold and suprathreshold human vision
- 1 October 1980
- journal article
- research article
- Published by Springer Nature in Biological Cybernetics
- Vol. 38 (3), 171-178
- https://doi.org/10.1007/bf00337406
Abstract
A nonlinear function is derived to describe the contrast transduction process for human visual mechanisms. This function is sigmoid in form, having an accelerating nonlinearity at low contrasts and a compressive nonlinearity at high contrasts. The resulting formulation is consistent with both signal detection theory and with Quick's (1974) equation for probability summation. Similarities between the present description of human vision and properties of complex cells in cat visual cortex are noted.Keywords
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