Notes
A collection of fragments of understanding in the pursuit of deeper questions.
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- Computational Vision
- Introduction to Data Science
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- Deep Learning in Artificial & Biological Neuronal Networks
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Ganglion Cells Have Center-Surround Receptive Fields
An Off-region strongly responds to reductions in light-intensity. The On-region responds to the opposite. In Center-Surround regions we can see that the two responses do not completely cancel each other.
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Center-Surround Receptive Fields Enhance Edges Ganglion cells can be considered like filters, they do some spatial averaging of what is happening in the receptive field. The filter enhances the spatial locations associated with high contrast. Ganglion cells are good local contrast detectors. By changing the size of the receptive field (for example in the periphery RF are larger, while in the fovea are smaller), for example by reducing it as in the example to the right, the resolution is increased.
