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A transducer function for threshold and suprathreshold human vision

✍ Scribed by Hugh R. Wilson

Publisher: Springer-Verlag
Year: 1980
Tongue: English
Weight: 718 KB
Volume: 38
Category: Article
ISSN: 0340-1200
DOI: 10.1007/bf00337406

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✦ Synopsis

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.

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