17 June 2003 Failure of stereomotion capture in an object disappearance paradigm
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Abstract
Motion capture is one of the basic effects of a moving surround. To explore the existence of a motion capture in the stereodomain, we designed dynamic autostereograms with target-surround configuration. The images consisted of several horizontal lines of disparate disks with the central line of disks specified as a target. The surround was set in stereomotion by alternating between two disparities, while the target did not change in disparity, but suddenly disappeared in phase with one of the two surround depth-planes, reappearing in phase with the other surround plane. The target was vividly perceived as moving in depth despite its lack of any disparity change or even a paired location in the second of the two alternating frames. The motion capture hypothesis predicts that the target should be seen to move in synchrony and in the same direction as the surround. However, surprisingly, the data showed that the target was always perceived disappearing in a backward direction and reappearing in a forward direction irrespective of the surround direction, thus suggesting that the reported illusory depth-motion into a stationary target is an independent perceptual phenomenon that has no relation to the expected capture paradigm.
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Lora T. Likova, Lora T. Likova, Christopher W. Tyler, Christopher W. Tyler, } "Failure of stereomotion capture in an object disappearance paradigm", Proc. SPIE 5007, Human Vision and Electronic Imaging VIII, (17 June 2003); doi: 10.1117/12.485517; https://doi.org/10.1117/12.485517
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