Patent ID: 11887549
Assignee: LX SEMICON CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 0:
1. A color gamut mapping method comprising:
converting, by a color space converter, first three-color signals of an input image into a first luminance component and a pair of first chrominance components and outputting the first luminance component and the pair of first chrominance components;
calculating and outputting, by a hue calculator, a hue angle using the first chrominance components;
selecting and outputting, by a hue axis selection unit, hue axes of a corresponding control area in which the calculated hue angle is located among a plurality of control areas divided by a plurality of hue axes having different hue angles;
calculating and outputting, by a parameter calculator, a plurality of parameters including a plurality of saturation gains and a plurality of hue gains using a plurality of parameters, which are set to correspond to the selected hue axes, and the calculated hue angle;
controlling, by a saturation controller, a saturation of the first chrominance component for each control area using the calculated saturation gain and outputting a second chrominance component;
controlling, by a hue controller, a hue of the second chrominance component for each control area using the calculated hue gain and outputting a third chrominance component;
interpolating, by an overall controller, a set value of a luminance gain using grayscale differences between the first three-color signals and outputting a second luminance component by controlling the first luminance component using the interpolated luminance gain;
controlling, by the overall controller, a saturation of the third chrominance component according to brightness values of the first three-color signals and outputting a fourth chrominance component; and
inversely converting, by a color space inverse converter, the fourth chrominance component and the second luminance component into second three-color signals and outputting the second three-color signals.