Impact of absolute disparities on motion in depth perception in stereoscopic displays Y Fattakhova1, P Neveu2, K Li1, J-L de Bougrenet de la Tocnaye1 |
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1Telecom Bretagne, France |
| It is known that motion in depth (MID) in stereoscopic displays is perceived due to absolute and relative disparity changes. Studies on MID perception are generally focused on relative disparity changes so does the link between absolute and relative disparities remains unclear. In order to clarify this link, it appears essential to identify the role played by the absolute disparity in MID perception. For this purpose, we employed the motion aftereffects (MAE) to test the hypothesis that visual system contains neural populations tuned to 3D directions of motion generated by absolute disparities. Observers were exposed to 20 min of a moving cross followed by 1 min of fixation on a stable cross. Subjects were instructed to discriminate the cross motion in depth during the 21 min of exposure. As changing of absolute disparity stimulates the oculomotor system (OS), OS changing was also assessed. Preliminary results indicate that no MAE could be observed whereas oculomotor changes appear. MID perception using absolute disparity seems mainly based on OS. Moreover, if in future studies a discrepancy is observed between MID perception using relative disparity and MID perception using both disparities, our results suggest that absolute and relative disparities interact and affect each other. |
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