Disambiguating velocity estimates across image space.
A translating homogeneous edge viewed through an aperture is an ambiguous stimulus, while a translating edge discontinuity is unambiguous. Under what conditions does the visual system use unambiguous velocity estimates to interpret ambiguous velocity estimates? We considered a translating rectangle visible through a set of stationary apertures. One aperture displayed a rectangle edge while the other apertures displayed corners. Observers reported the direction in which the edge appeared to translate. The results suggest that collinearity and terminator proximity determine whether the unambiguous corner velocity was used to interpret the ambiguous edge velocity. These results suggest some of the ways in which the visual system controls the integration of velocity estimates across image space.
Department of Neurobiology, Brain Research, Weizmann Institute of Science, Rehovot, Israel.
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Ben-Av
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Shiffrar
D003463:Cues; D003867:Depth Perception / Q000502:physiology; D005260:Female; D005556:Form Perception / Q000502:physiology; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D012399:Rotation; D013997:Time Factors