DIFFREQUENCY FUNCTION IN THE INFORMATION PROCESSING OF BINOCURAR STEREOSCOPIC VISION I DIFFREQUENCY "SURMOUNTING" DISPARITY
频差在立体视觉信息加工中的作用 Ⅱ、频差“克服”视差

The mechanism of binocular stereoscopic vision has not been clarified. It is the purpose of this research to study diffrequency surmonting disparity. "Stair" perception were obtained by stereoscopically viewing two scenes of gratings, one of which was with even distributed gratings and the other was with uneven distributed gratings. So, disparities existed between these two scenes. Three psychophysical methods of changing dif frequencies were used to see if "stair" can be perceived as a smooth plane without depth tilt, in other words, if diffrequency can surmount disparity. The results indicate that when diffre-quency equals zero, the fused gratings seems as a frontal plane parallel to the observer, even if there exist disparities. It suggests that diffrequency is the main cue of binocular tilt effect and represents disparity in primary visual syste m .