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The "Pincushion Grid" Illusion

Ronald A. Schachar
Science
New Series, Vol. 192, No. 4237 (Apr. 23, 1976), pp. 389-390
Stable URL: http://www.jstor.org/stable/1742118
Page Count: 2
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Abstract

The illusion generated by a "pincushion grid" is not predicted from the two-dimensional Fourier transform of the grid. This implies that the visual system may not perform two-dimensional Fourier transforms of observed patterns.

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