PICTURE QUALITY ENHANCING METHOD OF COLOR SIGNAL BASED ON THE QUANTIZED MEAN-SEPARATE HISTOGRAM EQUALIZATION AND THE COLOR COMPENSATION, AND CIRCUIT THEREOF

摘要

The image quality improvement method and its circuit of the present invention extracts a luminance signal from color signals, quantizes the luminance signal extracted, divides the input luminance image into a predetermined number of sub-images based on the average, Histogram equalization to output the changed luminance signal, and outputting the compensated color signals by changing the color signals to have the same ratio as the changed luminance signal, thereby providing a distortion-free color signal while improving the contrast of the color image.