1. A method for removing image artifacts from a representation of an image, comprising the steps of: (a) obtaining a pixel representation of the image; (b) classifying each pixel in the image as a screen or non-screen pixel; (c) examining pixels in a predetermined surrounding area of each pixel to check the classification of that pixel as determined in step (b); and (d) selectively applying a low pass filter to pixels in the image, such that, when the low pass filter is applied, a center of the low pass filter is selectively shifted relative to a current pixel based on the examining in step