Аннотация
Many objects have component parts, and these parts often differ in
their visual salience. In this paper we present a theory of part
salience. The theory builds on the minima rule for defining part
boundaries. According to this rule, human vision defines part boundaries
at negative minima of curvature on silhouettes, and along negative
minima of the principal curvatures on surfaces. We propose that the
salience of a part depends on (at least) three factors: its size
relative to the whole object, the degree to which it protrudes, and
the strength of its boundaries. We present evidence that these factors
influence visual processes which determine the choice of figure and
ground. We give quantitative definitions for the factors, visual
demonstrations of their effects, and results of psychophysical experiments.
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