Discriminating Rigid from Nonrigid Motion: Minimum Points and Views

Overview

Journal Percept Psychophys

Specialties Psychiatry
Psychology

Date 1990 Mar 1

PMID 2326144

Citations 15

Authors

M L Braunstein

D D Hoffman

F. E. Pollick

Affiliations

Soon will be listed here.

Abstract

Theoretical investigations of structure from motion have demonstrated that an ideal observer can discriminate rigid from nonrigid motion from two views of as few as four points. We report three experiments that demonstrate similar abilities in human observers: In one experiment, 4 of 6 subjects made this discrimination from two views of four points; the remaining subjects required five points. Accuracy in discriminating rigid from nonrigid motion depended on the amount of nonrigidity (variance of the interpoint distances over views) in the nonrigid structure. The ability to detect a rigid group dropped sharply as noise points (points not part of the rigid group) were added to the display. We conclude that human observers do extremely well in discriminating between nonrigid and fully rigid motion, but that they do quite poorly at segregating points in a display on the basis of rigidity.

Citing Articles

Aging and the visual perception of rigid and nonrigid motion.

Norman J, Ramirez A, Bryant E, Adcock P, Parekh H, Brase A Sci Rep. 2024; 14(1):27657.

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Anisotropy of object nonrigidity: High-level perceptual consequences of cortical anisotropy.

Maruya A, Zaidi Q bioRxiv. 2024; .

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Perceptual Biases in the Interpretation of Non-Rigid Shape Transformations from Motion.

Choi R, Feldman J, Singh M Vision (Basel). 2024; 8(3).

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Discerning nonrigid 3D shapes from motion cues.

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The effect of polar projection on the perception of euclidean structure from motion.

Borjesson E, Lind M Percept Psychophys. 1996; 58(6):871-82.

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