Patent ID: 9007392
Filing Date: 2015-04-14
Classification: G09G

Abstract:
1. A method for enhancing contrast of a color image displayed on a display system, said method comprising steps of: A. providing the color image, which has a plurality of pixels, each pixel having gray values of primaries including red, green, and blue; B. respectively measuring quantity distribution of the gray values of red component, the gray values of green component, and the gray values of blue component for all the pixels in the color image; C. computing respective transformation curves for the gray values of red component, the gray values of green component, and the gray values of blue component for all the pixels according to the quantity distribution measured in Step B; and D. calculating a corresponding output value for the gray value of red component in one of the pixels according to transformed values obtained by introducing the gray value of red component of said pixel into the respective transformation curves and weighting coefficients respectively corresponding to the transformed values, calculating a corresponding output value for the gray value of green component of said pixel according to transformed values obtained by introducing the gray value of green component of said pixel into the respective transformation curves and weighting coefficients respectively corresponding to the transformed values, calculating a corresponding output value for the gray value of blue component of said pixel according to transformed values obtained by introducing the gray value of blue component of said pixel into the respective transformation curves and weighting coefficients respectively corresponding to the transformed values.