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Human visual contrast detection of radial frequency stimuli defined by Bessel profiles j0,j1,j2,j4 ,j8,j16 and its relation to angular frequencies,

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2 Author(s)
M. L. d. B. Simas ; Dept. de Psicologia, Univ. Fed. de Pernambuco, Recife, Brazil ; N. A. dos Santos

We measured human contrast sensitivity to radial frequencies defined as Bessel profiles of n-order, i.e. j0, j1, j2,j4,j8,j16. Six curves of 11 experimental conditions (each) were measured three times by three observers (NAS, MLS, FMR) using a forced-choice method. The results show that contrast sensitivity is increased with the jn order for n greater than zero, having distinct orderly effects at the low and high frequency ends. We interpret these results as being most consistent with the possibility that a spatial frequency processing by the human visual system can be defined a priori in terms of polar coordinates

Published in:

Cybernetic Vision, 1996. Proceedings., Second Workshop on

Date of Conference:

9-11 Dec 1996