Video signal enhancement

摘要

In a video signal enhancement method, a video signal (Y) is histogram-based processed to obtain a histogram-processed video signal (Y'), and a sharpness of the histogram-processed video signal (Y') is enhanced to obtain an output video signal (Y") in dependence upon a sharpness enhancement control signal (CS) derived from at least the histogram-processed video signal (Y'). Advantageously, the sharpness enhancement control signal (CS) represents a derivative of the histogram-processed video signal (Y'). <IMAGE>