Method for Improving Image Quality of Color Signal Using Mean Matching Histogram Equalization and Color Compensation

摘要

The image quality improving method and the circuit of the present invention extract the luminance signal from the color signals and perform histogram equalization using the cumulative density function of the extracted luminance signal input in units of screens as a conversion function, but the average level of the extracted luminance signal Adjusts the conversion function to be mapped to itself, outputs the changed luminance signal, changes the color signals to have the same ratio as the changed luminance signal, and outputs the compensated color signals to improve the contrast and to the changed luminance signal by the contrast improvement. On the basis of this, the color signal can also be changed to provide a color signal without distortion.