Cortical Neural Mechanisms of Stereopsis Studied with Dynamic Random-dot Stereograms
This extract was created in the absence of an abstract.
Excerpt
In its simplest form, stereopsis provides the capacity for identifying “local” features, a line or a dot, as appearing in front of or behind other similar features from which they differ solely in horizontal disparity (Julesz 1971; Westheimer and McKee 1980). Psychophysical studies with random-dot stereograms, invented by Julesz in 1960, revealed more elaborate disparity processing and proved convincingly that only a difference in the horizontal position of corresponding elements of left and right retinal images is required for the perception of form and movement in stereoscopic depth. Moreover, these studies brought out a major problem of stereoprocessing, the correspondence problem, i.e., how the matching binocular image features are identified. This problem, common in viewing everyday visual scenes, becomes most conspicuous with random-dot stereograms, in which the image of one dot in one eye can be matched with the image of any dot in the other eye. Yet the numerous...
