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Published 1998 | Published
Book Section - Chapter Open

A Model of Early Visual Processing

Abstract

We propose a model for early visual processing in primates. The model consists of a population of linear spatial filters which interact through non-linear excitatory and inhibitory pooling. Statistical estimation theory is then used to derive human psychophysical thresholds from the responses of the entire population of units. The model is able to reproduce human thresholds for contrast and orientation discrimination tasks, and to predict contrast thresholds in the presence of masks of varying orientation and spatial frequency.

Additional Information

© 1998 Massachusetts Institute of Technology. This work was supported by NSF-Engineering Research Center (ERC), NIMH, ONR, and the Sloan Center for Theoretical Neurobiology.

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