This is what happens when you run the chromatic distortion filter on an image recursively about a thousand times… crazy effect, huh?
What’s scientifically going on here is that we’re trying to ‘correct’ distortions in the picture that happen increasingly as you move away from the center of the image. Therefore, the center of the image is really good, and the corners are really bad. This filter ‘corrects’ those bad pixels by comparing them to the center pixels and approximating new values for them.
This is what happens when you run the filter on an initial image, then run it again on the filtered image, then run it again on the filtered, filtered image, etc (ie, recursively).