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. 1992 Apr;51(4):386-96.
doi: 10.3758/bf03211632.

The detection of surface curvatures defined by optical motion

J F Norman  1 , J S Lappin
Affiliations

The detection of surface curvatures defined by optical motion

J F Norman et al. Percept Psychophys. 1992 Apr.

Abstract

The detectability of surface curvatures defined by optical motion was evaluated in three experiments. Observers accurately detected very small amounts of curvature in a direction perpendicular to the direction of rotation, but they were less sensitive to curvatures along the direction of rotation. Variations in either the number of points (between 91 and 9) or the number of views (from 15 to 2) had little or no effect on discrimination accuracy. The results of this study demonstrate impressive visual sensitivity to surface curvature. Several characteristics of this sensitivity to curvature are inconsistent with many computational models for deriving three-dimensional structure from motion.

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References

    1. Biol Cybern. 1990;62(3):211-24 - PubMed
    1. J Exp Psychol Hum Percept Perform. 1989 Nov;15(4):826-40 - PubMed
    1. Vision Res. 1981;21(10):1475-82 - PubMed
    1. Vision Res. 1988;28(3):371-86 - PubMed
    1. J Exp Psychol Hum Percept Perform. 1984 Feb;10(1):1-11 - PubMed

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