Patent ID: 6388704
Filing Date: 2002-05-14
Classification: G06T,H04N

Abstract:
A video signal-processing device comprising an arrangement for detecting scratches in images of a video signal, characterized in that the arrangement for detecting scratches comprises:means for combining a given number (m) of series-arranged pixels of a video image to form a group; means for determining a division of the pixels in accordance with given criteria for each group of pixels; and means for classifying, based on this division, the pixel groups in scratch sections and non-scratch sections, further characterized in that, for the purpose of classification of scratch sections, the arrangement comprises: means for comparing high-pass-filtered pixels with at least a contrast threshold value (+C); means for determining a sum of the pixels of a pixel group exceeding a given contrast threshold value (+C); and means for classifying, in so far as this sum exceeds a further threshold value (m/2), this pixel group as a scratch section.