Abstract
We can perceive 3D structures in visual field from binocular disparity. However, the tolerance in the difference of the images for stable 3D perception is not clearly defined. For example, when there is a remarkable inconsistency in binocular images, the problems such as "eyestrain" and "inappropriate depth perception" could occur. In this study, we investigated the effect of the difference in the spatial frequency components of the binocular images on depth perception. The results indicate that high spatial-frequency components of the image are important for deciding stereo acuity.