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| Perturbation Analysis of the Changes in V1 Receptive Fields due to Context | |||
| J. Malo, J. Gutiérrez and J. Rovira
Presented at the Gordon Research Conference: Sensory Coding and the Natural Environment. Oxford, UK. (2004) |
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| Abstract
The principal axes of a system can be defined
as the directions of the input space that isolate the response of a single
sensor of the system. In this work we show that if the current psychophysical
and neurophysiological models of gain control are correct, the principal
axes of the early image representation in the human brain wouldn't be the
independent components of natural images but an arbitrary combination of
them. We show that this combination depends on the input stimulus and may
depend on the adaptation state.
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| Keywords:
Human Vision, Natural Image Statistics, ICA, Wavelets, Non-linear Systems, Discrimination Regions, Incremental Thresholds, Gain Control, Divisive Normalization. References: 7 |
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