Stereopsis with chromatic contours.

Abstract In this experiment stereopsis occurred for stimuli defined by chromatic contours. A chromatic contour was defined as a contour formed by a spatial chromatic change with the chromatic components heterochromatically equated using the criterion of a minimally distinct border. Discrimination differed for different combinations of target and background hue. Discrimination was better when the stereoscopic target was at a 30′ binocular disparity than at a 7′ binocular disparity. It was suggested that the discrimination level was related to the distinctness of border of the target against the background for a given magnitude of binocular disparity. Several theories of the cue to stereopsis were discussed in regard to the findings of this experiment.

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