Kontsevich L L, Tyler C W, 2000, "Depth adaptation and stereoscopic channel structure" Perception 29 ECVP Abstract Supplement
Depth adaptation and stereoscopic channel structure
L L Kontsevich, C W Tyler
Stereoscopic channel structure was assessed by the measurement of depth-adaptation effect with adjustment method. Adaptation, test, and comparison stimuli, were all low-pass-filtered random-dot stereograms, which encoded a bulge z = d exp(- r 5), where r is the radius and d is the disparity magnitude. The adaptation effect was measured for combinations of adaptation and test stimuli within the disparity range of -12 to 12 min of arc.
The major effect was that adaptation to either protruding or intruding bulges had little or no effect at the adaptation disparity but increased the perceived magnitudes of both larger and smaller disparities. Fitting the data with a simple model with several stereoscopic channels showed that a three-channel model provided an accurate fit and that adding new channels improved the fit insignificantly.
The channels derived for the three-channel model are similar to the near, flat, and far channels proposed by Richards (1971 Journal of the Optical Society of America 61 410 - 414).
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