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Spatiotemporal boundary formation: boundary, form, and motion perception from transformations of surface elements. |
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AbstractContinuous surface boundaries, object shape, and global motion can be perceived from information that is fragmentary in both space and time. The authors report investigations indicating that accretion and deletion of texture is only 1 member of a broader class of element transformations that produce boundaries, shape, and motion, through spatiotemporal boundary formation (SBF). The authors report 4 experiments exploring SBF. The first 3 examine the class of transformations producing SBF, indicating that local element changes in color, orientation, or location are all effective. A 4th experiment examines temporal constraints on SBF. Integration of local element changes to produce boundaries, form, and global motion appears to be confined to a 165-ms window. Two classes of spatiotemporal integration models are considered; the relation between SBF and other cases of boundary interpolation are discussed.
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