Visual summary of the evidence for cones across spatial locations. Dark
areas show less evidence for the presence of a cone, while red, green and blue
areas show evidence for cones of the corresponding types. The colors displayed,
which cannot be assigned meaningful units, were obtained as explained in the
main text. The axes count the number of possible cone positions considered,
which is 4 times the number of pixels in the stimulus: the evidence map is
supersampled by a factor of 4 compared to the original stimulus and
STAs.