Perceived depth of multi parallel-ov erlapping-transparent- stereoscopic-surfaces

摘要

The geometric relational expression of horizontal disparity, viewing distance, and depth magnitude between objects in stereopsis suggests that, for a given viewing distance, the magnitude of perceived depth of objects would be the same as long as the disparity magnitudes are the same. However, we found that this is not necessarily the case for random dot stereograms that depict parallel-overlapping-transparent-stereoscopic-surfaces (POTS). Data from three experiments indicated that 1) the magnitude of perceived depth between two-POTS is larger than that for an identical pair of stereo-surfaces but with an additional stereo-surface located between the pair (i.e., three-POTS configuration) and 2) the magnitude of perceived depth is larger when the stimulus size is relatively large (20 ×16 arc deg) than when the stimulus size is relatively small (10 × 6 arc deg) either for the two-POTS or the three-POTS configuration. The results suggest that the magnitude of perceived depth of the outermost surfaces of a POTS configuration may differ depending on the number of POTS and its stimulus size even when the disparity magnitudes and the viewing distances are the same.