Patent ID: 7312815

Claim:
A method of color calibration for calibrating an input color into a target color, the target color being represented by a first coordinate pair (X 1 , Y 1 ) in a color coordinate system, the method of color calibration comprising the steps of: (1) inputting the input color, the input color being represented by a second coordinate pair (X 2 , Y 2 ) in the color coordinate system and being adjusted by a chrominance parameter Pb and a chrominance parameter Pr; (2) respectively comparing X 1 with X 2 and comparing Y 1 with Y 2 to obtain a state, further comprising: (2.1) subtracting X 1 from X 2 to derive a first value; and (2.2) subtracting Y 1 from Y 2 to derive a second value; and (3) when the first value and the second value have a same sign, adjusting the chrominance parameter Pb until one of the following conditions is satisfied: the first value and the second value have different signs; and one of the first value and the second value is zero, and then respectively adjusting the chrominance parameter Pb and the chrominance parameter Pr in response to the state until X 1 =X 2 and Y 1 =Y 2 .