Figure 7.

A–C, Coarse footprints of X and diamond images and the difference image obtained by pixel-wise subtraction of diamond from X. D, E, The behavioral and neuronal discrimination indices as measured experimentally are plotted against the coarse footprint difference index for 16 image pairs. The numbers appended to the points have the same significance as in Figure 5. Note that the color pair from set 1 (point 1) was excluded from the analysis because the coarse footprint index can be straightforwardly calculated only for monochromatic images. F, Correlation between behavioral and neuronal discrimination as a function of degree of blur.