Two-dimensional approach to psychophysical orientation tuning
- 1 January 1990
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America A
- Vol. 7 (1), 141-151
- https://doi.org/10.1364/josaa.7.000141
Abstract
Orientation bandwidths of psychophysical channels in the human visual system were inferred from contrast thresholds for a special class of polar-separable, two-dimensional patterns. Detection thresholds for these patterns conformed to a model with linear filtering by orientation-selective channels followed by probability summation across these channels. The number of channels (6–8 pairs) and their half-bandwidths at half-sensitivity (approximately 17°) did not differ at 4 and 10 cycles/degree. The results extend the many one-dimensional, linear system models of vision to two dimensions.Keywords
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