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NIPS
1998

Modeling Surround Suppression in V1 Neurons with a Statistically Derived Normalization Model

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Modeling Surround Suppression in V1 Neurons with a Statistically Derived Normalization Model
We examine the statistics of natural monochromatic images decomposed using a multi-scale wavelet basis. Although the coefficients of this representation are nearly decorrelated, they exhibit important higher-order statistical dependencies that cannot be eliminated with purely linear processing. In particular, rectified coefficients corresponding to basis functions at neighboring spatial positions, orientations and scales are highly correlated. A method of removing these dependencies is to divide each coefficient by a weighted combination of its rectified neighbors. Several successful models of the steady-state behavior of neurons in primary visual cortex are based on such "divisive normalization" computations, and thus our analysis provides a theoretical justification for these models. Perhaps more importantly, the statistical measurements explicitly specify the weights that should be used in computing the normalization signal. We demonstrate that this weighting is qualitati...
Eero P. Simoncelli, Odelia Schwartz
Added 01 Nov 2010
Updated 01 Nov 2010
Type Conference
Year 1998
Where NIPS
Authors Eero P. Simoncelli, Odelia Schwartz
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