[Paper] Ratio of Pseudo-Stereoanomalous Young Adults and Improvement of Their Stereopsis in 3D-Graphic Environments: Study for Depth Perception Based on the Use of Disparity and Shading

Abstract

We investigated the individual differences in the use of binocular disparity and proposed a method for improving stereopsis in observers who do not perceive depth from disparity in 3D-graphic environments. In Experiment 1, non-stereoanomalous observers, aged 19-25 years, were asked to roughly evaluate the depth of 3D-graphcial stimuli containing binocular disparity and shading. The results of Experiment 1 showed 30% of the observers were pseudo-stereoanomaly who perceived depth only from shading. In Experiment 2, 60% of the pseudo-stereoanomalous observers were able to use disparity when they had to assess the depth concretely. In Experiment 3, all of the observers who participated in Experiment 2 learned to use the disparity information when retasked with roughly estimating again. These results suggest that quite a few people have difficulty in experiencing rich depth perception in current 3D-graphic environments. However, appropriate training procedures would improve their use of disparity information over the long term.