Spatial summation effects on two-component grating thresholds
- 1 January 1978
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 68 (1), 116-121
- https://doi.org/10.1364/josa.68.000116
Abstract
Some experimental studies of subthreshold summation between sinusoidal grating components have been interpreted as showing very narrow channel bandwidths in human visions. This paper discusses an alternative interpretation of these experiments based on consideration of probability-summation effects among spatially distributed detectors. We conclude that frequency-selective channels must still be hypothesized in order to fit the data, but the channel bandwidth may be much wider than earlier interpretations suggest.Keywords
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