1. A method for comparing image quality for a first image and a second image, the method comprising: identifying a first set of Red-Green-Blue (RGB) image data for the first image and a second set of RGB image data for the second image; transforming the first RGB image data to spherical coordinates, wherein the spherical coordinates for the first RGB image data comprise a first set of Spherical Coordinate Transform (SCT) image data; transforming the second RGB image data to spherical coordinates, wherein the spherical coordinates for the first RGB image data comprises a second set of SCT image data; applying a Gabor filter to the first set of SCT image data to produce a first Gabor feature set; applying the Gabor filter to the second set of SCT image data to produce a second Gabor feature set; applying a statistics calculation to the first Gabor feature set to produce a first set of Gabor feature statistics; applying the statistics calculation to the second Gabor feature set to produce a second set of Gabor feature statistics; and comparing the first set of Gabor feature statistics to the second set of Gabor feature statistics.