Visual Encoding of Spatial Relations
Annual technical rept. 1 Jan-31 Dec 1993
NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF COMPUTER SCIENCE
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Psychophysical and theoretical research was conducted on the processes underlying the encoding of relative spatial locations of objects and edges of single objects. Work was done on developing a model of shape representation, called Object Representation by Cores, that is based on previous findings, sponsored by this grant, that the area over which position information is gathered scales with the distance being judged. Experimental work included measuring orientation discrimination thresholds for cone stimuli of various widths and measuring bisection thresholds for stimuli with sinusoidally modulated edges, where both edge modulation frequency and object width were manipulated. Results of both studies verified the key assumption of the model the scale of the boundariness detector that contributes to perception of object shape covaries with object width. Studies continued on the perception of area. A new line of research was begun on the nature of information observers have about scenes containing multiple objects. Human vision, Spatial vision, Shape perception, Localization.
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