Method for improving image quality of color signal using quantized average separated histogram equalization and color compensation and its circuit

摘要

The image quality improving method and the circuit of the present invention extract a luminance signal from color signals, quantize the extracted luminance signal, divide the input luminance image into a predetermined number of sub-images based on the average, and independently for each sub-image. By outputting the changed luminance signal by histogram equalization, changing the color signals to have the same ratio as the changed luminance signal, and outputting the compensated color signals, a color signal without distortion can be provided while improving the contrast of the color image.