Failure of stereomotion capture in an object disappearance paradigm.

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TitleFailure of stereomotion capture in an object disappearance paradigm.
Publication TypeConference Paper
Year of Publication2003
AuthorsLikova, LT, Tyler, CW
Conference NameHuman Vision and Electronic Imaging
Keywordscontextual effects, motion capture, motion interpretation, object disappearance, perceptual heuristics, Stereomotion

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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