Accession Number : AD0662005
Title : CONTOUR DESCRIPTOR PROPERTIES OF VISUAL SHAPE.
Descriptive Note : Final rept. 1 Feb 66-31 Jan 67,
Corporate Author : SPERRY RAND RESEARCH CENTER SUDBURY MASS
Personal Author(s) : Kaufman,L. ; Hochberg,J. ; Richards,W. ; Pitblado,C. B.
Report Date : SEP 1967
Pagination or Media Count : 90
Abstract : The results of a one year program to elucidate the problems underlying shape perception are presented. Following a review of the field, extensive studies of spontaneous fixation tendencies in visual forms are reported. These studies indicate that visual shape is a stimulus to fixation, suggesting that the peripheral inputs, per se, are not the primary determiners of spontaneous fixation tendencies, but that the already organized cortical representation of shape is such a factor. Experiments will flow patterns in visual noise suggest that the visual system does behave as if it has field or global properties. Finally, studies of illusions indicate that a second class of visual illusions can be designated on the basis of dependency on converging lines or line segments as the inducing feature. Illusions in this inclination-dependent class are all such that if the illusion inducing lines are rotated so they are parallel or normal to the test lines the illusion is eliminated. This classification permits a number of apparently different illusions, including the Hering, Zollner, and Ponzo illusions, to be considered related. (Author)
Descriptors : (*VISUAL PERCEPTION, GEOMETRIC FORMS), SPACE PERCEPTION, ILLUSIONS, STIMULATION(PHYSIOLOGY), VISION
Subject Categories : Psychology
Distribution Statement : APPROVED FOR PUBLIC RELEASE