Journal of Computational Neuroscience

, Volume 22, Issue 2, pp 135–146

A network that uses few active neurones to code visual input predicts the diverse shapes of cortical receptive fields

Article

DOI: 10.1007/s10827-006-0003-9

Cite this article as:
Rehn, M. & Sommer, F.T. J Comput Neurosci (2007) 22: 135. doi:10.1007/s10827-006-0003-9

Abstract

Computational models of primary visual cortex have demonstrated that principles of efficient coding and neuronal sparseness can explain the emergence of neurones with localised oriented receptive fields. Yet, existing models have failed to predict the diverse shapes of receptive fields that occur in nature. The existing models used a particular “soft” form of sparseness that limits average neuronal activity. Here we study models of efficient coding in a broader context by comparing soft and “hard” forms of neuronal sparseness.

As a result of our analyses, we propose a novel network model for visual cortex. The model forms efficient visual representations in which the number of active neurones, rather than mean neuronal activity, is limited. This form of hard sparseness also economises cortical resources like synaptic memory and metabolic energy. Furthermore, our model accurately predicts the distribution of receptive field shapes found in the primary visual cortex of cat and monkey.

Keywords

Biological vision Sparse coding Receptive field learning 

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.Computational Biology and NeurocomputingSchool of Computer Science and Communication, Royal Institute of Technology (KTH)StockholmSweden
  2. 2.Redwood Center for Theoretical NeuroscienceUniversity of California, BerkeleyBerkeleyUSA

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