Patent ID: 7375854
Filing Date: 2008-05-20
Classification: H04N

Abstract:
1. A method for color correction including: (1) the gray levels and the luminance values of a light source of a display device being measured by a color measurement system; (2) the gray levels and luminance values being normalized and N groups of gray levels (P) and luminance values (Q) being selected, wherein N is a positive integer and 2≦N≦maximum of what the display device can display; (3) each n groups of selected values being taken as an interval, wherein n is a positive integer and 2≦n ≦N; (4) the gray levels (P) and the luminance values (Q) of each interval being executed by logarithmic and divisional operations to obtain a gamma parameter: γ=log Q/log P, then a fitting function of the gamma parameter for each interval being able to be obtained, which can fit all selected data of the interval; (5) a fitting luminance value of each gray level in interval being able to be obtained from the fitting function of the gamma parameter for each interval of each color light of the light source, and then a lookup table consisted of gray levels and their corresponding fitting luminance values being able to be made; (6) original gray data of an image being normalized to obtain a gamma curve consisted of gray levels (X) and luminance values (Y) of each color light of the light source, where the function of the gamma curve is Y=X (7) the image gray signals of the function of the gamma curve Y=X