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Despite their structured receptive fields (RFs) and the strong linear components in their responses, most simple cells in mammalian visual cortex exhibit nonlinear behaviors. Besides the contrast-response function, nonlinearities are evident in various types of failure at superposition tasks, in the disagreement between direction indices computed from drifting and counterphase flickering gratings,...
Two-dimensional receptive fields are investigated from an information theoretic viewpoint. It is known that the spatially localized and orientation- and spatial-frequency-tuned receptive fields of simple cells in the visual cortex are well described by Gabor functions. This paper shows that the Gabor functions are derived as solutions for a certain mutual-information maximization problem. This means...
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