Could also be useful to downscale images using the 'high contrast downscale' filter (as we call it in our lab; maybe this isn't the common name). For each set o

Could also be useful to downscale images using the 'high contrast downscale' filter (as we call it in our lab; maybe this isn't the common name). For each set of pixels to become one, you compute min, max and mean, and select the one of {min, max} which is closer to mean. Unfortunately, I don't have any examples handy.