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

摘要

The image quality improving method and the circuit of the present invention extract a luminance signal from color signals and perform histogram equalization using a quantized cumulative density function of the extracted luminance signal as an transform function using an interpolated cumulative density function as an transform function. Adjust the conversion function so that the average level of the luminance signal is mapped to itself to output the changed luminance signal, change the color signals to have the same ratio as the changed luminance signal, and output the compensated color signals to improve contrast while improving contrast A color signal without distortion can be provided by changing the color signal based on the luminance signal changed by?.