Patent ID: 7606423
Filing Date: 2009-10-20
Classification: H04N

Abstract:
1. A method comprising: receiving a video signal from a video signal source, the video signal source being a video tuner, a satellite earth station or a DVD player; detecting vertical edge pixels in an image in the video signal; analyzing said detected vertical edge pixels by horizontal location in said image to detect a spatial periodicity in said detected vertical edge pixels; detecting horizontal edge pixels in said image; analyzing said detected horizontal edge pixels by vertical location in said image to detect a spatial periodicity in said detected horizontal edge pixels; post-processing said image based on results of said analyzing steps; and displaying said post-processed image on a display device; wherein: said detecting vertical edge pixels includes, with respect to a target pixel: classifying the target pixel as an edge pixel if and only if all of the following conditions are met: (a) the first difference Δ (b) the first difference Δ (c) the first difference Δ