1. A method of analyzing an image, the method comprising: receiving at least one unfiltered image and at least one corresponding filtered image; selecting a first image element of the filtered image; selecting a first blurring operator; applying the first blurring operator to a neighborhood surrounding the first image element to determined a blurred image element, wherein the blurring operator is adapted to reduce a magnitude of a high spatial frequency component of an image spectrum relative to a magnitude of a low spatial frequency component of the image spectrum; evaluating an error metric to compare the blurred image element and the first image element with a corresponding image element of the unfiltered image; generating an output image including at least a first output image element; and in response to the error metric satisfying a first criteria, setting the first output image element to equal the blurred image element.