A Simple Model of Optimal Population Coding for Sensory Systems
Figure 8
Predicting different retinal light adaptations at different eccentricities.
Each panel consists of three plots. Top: The (smoothed) cross section of a typical receptive field through the peak. The horizontal line indicates the weight value of zero. Middle: The intensity map of the same receptive field. The bright and dark colors indicate positive and negative weight values, respectively, and the medium gray color indicates zero. Superimposed is the outline of the center subregion (the contour defined by the half-height from the peak) along with the average number of pixels (cones photoreceptors) inside the contour. Bottom: The half-height contours of the entire neural population which displays their tiling in the visual field. Two neurons are highlighted for clarity (one of which corresponds to the neuron shown above). The pixel lattice is depicted by the orange grid.