Uncertainty relation for resolution in space, spatial frequency, and orientation optimized by two-dimensional visual cortical filters.
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Additional excerpts
...G(f) = expi-[log(f/f 0 )] 2 /2[log(oi/f0 )] 2 I, (12)...
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Cites methods from "Uncertainty relation for resolution..."
...Each isolated iris pattern is then demodulated to extract its phase information using quadrature 2D Gabor wavelets ( Daugman 1985, 1988, 1994 )....
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Cites background from "Uncertainty relation for resolution..."
...D integral; is the raw iris image in a dimensionless polar coordinate system that is size- and translation-invariant and which corrects for pupil dilation as explained in a later section; and are the multiscale 2-...
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References
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"Uncertainty relation for resolution..." refers background in this paper
...It should be noted that 2D Gabor functions (1) have the same functional form in both 2D domains, as can be verified by applying the similarity theorem and the shift/modulation theorem to Eqs....
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...(1)], expresses the theoretical limit of joint 2D resolution in the two 2D domains....
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...(1) that if (Ax)/(Ay) = A, then also (Av)/Au) = A....
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"Uncertainty relation for resolution..." refers background in this paper
...Equation (4) expresses explicitly the fact that for a fixed spatial aspect ratio A, there is a positive correlation between spatial-frequency bandwidth and orientation bandwidth....
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...(4) predicts for this 2D Gabor filter that A01/2 = 190, and their empirical regression line predicts 170; when Aw = 1....
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...A01/2 = arcsin[X (2"- - 1)| (2A- + 1)1 (4)...
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