A system, (i.e., a method, an apparatus, and computer-executable process steps), providing sharpness enhancement for coded video, in which a usefulness metric, calculates how much a pixel can be enhanced without increasing coding artifacts. The usefulness metric is separate from the enhancement algorithm...http://www.google.com/patents/US6950561?utm_source=gb-gplus-sharePatent US6950561 - Method and system for sharpness enhancement for coded video
