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Anisotropic responses to motion toward and away from the eyeWhen a rigid object moves toward the eye, it is usually perceived as being rigid. However, in the case of motion away from the eye, the motion and structure of the object are perceived nonveridically, with the percept tending to reflect the nonrigid transformations that are present in the retinal image. This difference in response to motion to and from the observer was quantified in an experiment using wire-frame computer-generated boxes which moved toward and away from the eye. Two theoretical systems are developed by which uniform three-dimensional velocity can be recovered from an expansion pattern of nonuniform velocity vectors. It is proposed that the human visual system uses two similar systems for processing motion in depth. The mechanism used for motion away from the eye produces perceptual errors because it is not suited to objects with a depth component.
Document ID
19870036166
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Perrone, John A.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Publication Information
Publication: Perception and Psychophysics
Volume: 39
Issue: 1, 19
ISSN: 0031-5117
Subject Category
Behavioral Sciences
Accession Number
87A23440
Distribution Limits
Public
Copyright
Other

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