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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.
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