Patent ID: 8704740

Claim:
A method of establishing a gamma table, the method comprising: providing a signal generator, a display device, and a color analyzer, the display device for displaying images; measuring luminance values of the images corresponding to a plurality of reference sampling points; obtaining a luminance characteristic curve based on the reference sampling points and luminance values using Bezier curve interpolation; locating gray scales on the luminance characteristic curve with the same luminance values as the gray scales of a standard gamma table; and establishing a gamma table by comparing the gray scales of the standard gamma curve and the luminance characteristic curve; wherein the luminance values of the display device are measured by the color analyzer; and wherein obtaining a luminance characteristic curve based on the reference sampling points and luminance values using Bezier curve interpolation comprises: dividing the sampling points into a plurality of control groups including M sampling points, M being a whole number and 3≦M≦2 n , and 2≦n≦5, and the initial sampling point of any one control group being the same as the final sampling point of the previous successive control group; and using M sampling points of each control group as control points for a M−1th Bezier curve and calculating the luminance values corresponding to 15 gray scales evenly spaced between two adjacent sampling points by the M−1th Bezier curve.