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"... Letter to the editor Dear Editor, In a recent paper Balboa, Tyler, and Grzywacz (2001) report findingswhich contradict elementsof my work on the originsof scaling in natural images(Ruderman, 1997). Here I refute their claim and in addition show that the theoretical approximationspresented in their A ..."
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Letter to the editor Dear Editor, In a recent paper Balboa, Tyler, and Grzywacz (2001) report findingswhich contradict elementsof my work on the originsof scaling in natural images(Ruderman, 1997). Here I refute their claim and in addition show that the theoretical approximationspresented in their Appendix are not appropriate for ensembles of natural images. In a self-similar image ensemble any ensemble averaged statistic has a spatial dependence which is pure power-law. A change in scale alters the coefficient in front of thispower-law term but doesnot change its functional form. One such statistic is the ensemble power spectrum which has been shown to obey a powerlaw for over 2.5 decadesin spatial frequency (Ruderman
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"... Lateral facilitation – No effect on the target noise level ..."
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"... Detecting contrast changes in invisible patterns during binocular rivalry ..."
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Detecting contrast changes in invisible patterns during binocular rivalry
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