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. 2013 Jul 19;8(7):e69154. doi: 10.1371/journal.pone.0069154

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© 2013 Del Viva et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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a, Probability distribution of the 512 possible 3×3 1-bit pixel patterns (grey histogram). The curves are the model selection functions (eq. 1) for W = 0.05 and two different values of N.(green: N = 50; blue: N = 15). Green and blue histograms are the probability distributions of corresponding selected patterns. Their actual bandwidth occupancies (∫_f(p)>c pδ(p)dp) turn out to be slightly lower (respectively 0.025 and 0.015) than the imposed limit W. Cyan and yellow histograms are the distributions of low-probability patterns used in our measurements. b,c, Visualization of the pattern sets shown in (a), in green and blue respectively. d, Visualization of the lowest-probability patterns (discarded by our approach due to large storage occupation). e, Visualization of the highest-probability patterns (discarded due to large bandwidth occupation). f, Averaged sensitivity for detection of the patterns as a function of their probability, measured on three human subjects (different colors). Errors are determined by the fit (see Methods). The results of pairwise statistical comparisons (z tests, N = 100) amongst sensitivities plotted in (f) are:

Inline graphic — a, Probability distribution of the 512 possible 3×3 1-bit pixel patterns (grey histogram). The curves are the model selection functions (eq. 1) for W = 0.05 and two different values of N.(green: N = 50; blue: N = 15). Green and blue histograms are the probability distributions of corresponding selected patterns. Their actual bandwidth occupancies (∫_f(p)>c pδ(p)dp) turn out to be slightly lower (respectively 0.025 and 0.015) than the imposed limit W. Cyan and yellow histograms are the distributions of low-probability patterns used in our measurements. b,c, Visualization of the pattern sets shown in (a), in green and blue respectively. d, Visualization of the lowest-probability patterns (discarded by our approach due to large storage occupation). e, Visualization of the highest-probability patterns (discarded due to large bandwidth occupation). f, Averaged sensitivity for detection of the patterns as a function of their probability, measured on three human subjects (different colors). Errors are determined by the fit (see Methods). The results of pairwise statistical comparisons (z tests, N = 100) amongst sensitivities plotted in (f) are: