Patent ID: 6915023
Filing Date: 2005-07-05
Classification: H04N

Abstract:
1. A contour correcting device comprising: an edge extractor for calculating the strength of a contour in a picture signal; a mean luminance calculator for calculating a mean luminance level in a specified area in the picture signal and calculating a deviation of the mean luminance level from a predetermined luminance level; a first processor for controlling an output from the edge extractor based on an output from the mean luminance calculator; a waveform corrector which divides the picture signal into a plurality of luminance level ranges and controls a luminance level characteristic for each of the classified ranges; a second processor for calculating a variation of an output from the waveform corrector from the picture signal; and a third processor for generating a contour correcting signal by multiplying an output from the first processor by an output from the second processor.