Shape constancy from binocular disparity with self-motion in depth H Shigemasu1, K Okubo2, P Yan2 |
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1School of Information, Kochi University of Technology, Japan |
| Previous studies have investigated the three-dimensional shape constancy from binocular disparity using objects which were static or moved in the direction of depth and found that depth was overestimated at near distances. However, little is known how we perceive disparity-defined object when we actively move toward or away from it. The purpose of this study is to examine the shape constancy from binocular disparity with observer's self-motion in depth. The observers moved forward and judged whether the cylindrical object appeared expanded or compressed relative to the perceived shape at the start position. The disparity of object changed in real-time according to the position of observer using magnetic motion tracker. The results showed that the shape appeared constant when the simulated depth within object was compressed as observers moved toward the object. Thus, overestimation of depth at near distance was also found with self-motion. We also examined the shape constancy in the condition in which only two frames were shown at start and end position. The results showed no significant difference between two-frame and continuous display, suggesting that the continuous disparity change with self-motion does not have a significant effect on accurate depth perception for shape constancy. [Supported by JSPS (#24730625)] |
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