butteraugli - 0~20170116-3 main

Butteraugli is a project that estimates the psychovisual similarity of
two images. It gives a score for the images that is reliable in the
domain of barely noticeable differences. Butteraugli not only gives a
scalar score, but also computes a spatial map of the level of
differences.
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One of the main motivations for this project is the statistical
differences in location and density of different color receptors,
particularly the low density of blue cones in the fovea. Another
motivation comes from more accurate modeling of ganglion cells,
particularly the frequency space inhibition.