Apparatus for and method of enhancing color temperature in color image
AssigneeSamsung Electronics Co., Ltd.
InventorsMoon-cheol Kim, Dong-il Song
Life of this patent
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Abstract
A method of enhancing a color temperature of a color image includes calculating gains for input image signals based on a predetermined gain function. A first offset value corresponding to a change in a pedetermined color temperature of output signals is calculated. A second offset value is calculated based on the gains and the first offset value. The second offset value is added to a B signal of the output signals. A compensation gain is calculated in consideration of intensity of the B signal to which the second offset value is added. The compensation gain is added to a G signal. Thus, a desired color temperature can be obtained regardless of the intensities of R, G, and B signals.
Claims41
A method of enhancing a color temperature of a color image, the method comprising:
- calculating a gain for input image signals based on a predetermined gain function;
- converting the input image signals to output signals in a predetermined form;
- obtaining a first offset value corresponding to a change in a predetermined color temperature of the output signals;
- calculating a second offset value based on the gain and the first offset value;
- adding the second offset value to one selected from the output signals;
- calculating a compensation gain in consideration of a size of the output signal to which the second offset value is added;
- and
- adding the compensation gain to another one of the output signals except the output signal to which the second offset value is added.
A method of enhancing a color temperature of a color image, the method comprising:
- calculating a gain for input image signals based on a predetermined gain function;
- converting the input image signals to output signals in a predetermined form;
- obtaining a first offset value corresponding to a change in a predetermined color temperature of the output signals;
- calculating a second offset value based on the gain and the first offset value;
- calculating a linear gain from a size of at least one of the output signals;
- calculating a third offset value based on the linear gain and the second offset value;
- adding the third offset value to one of the output signals;
- calculating a compensation gain in consideration of a size of the output signal to which the third offset value is added;
- and
- adding the compensation gain to another one of the output signals except the output signal to which the third offset value is added.
An apparatus for enhancing a color temperature of a color image, the apparatus comprising:
- a gain calculator which calculates a gain for input image signals based on a predetermined gain function;
- an output signal converter which converts the input image signals to output signals in a predetermined form;
- a first offset value calculator which calculates a first offset value corresponding to a change in a predetermined color temperature of the output signals;
- a second offset value calculator which calculates a second offset value based on the gain and the first offset value;
- an offset adder which adds the second offset value to one of the output signals;
- and
- a compensation gain calculator which calculates a compensation gain in consideration of a size of the output signal to which the second offset value is added,
- wherein the compensation gain is added to another one of the output signals except the output signal to which the second offset value is added.
An apparatus for enhancing a color temperature of a color image, the apparatus comprising:
- a gain calculator which calculates a gain for input image signals based on a predetermined gain function;
- an output signal converter which converts the input image signals to output signals in a predetermined form;
- a first offset value calculator which calculates a first offset value corresponding to a change in a predetermined color temperature of the output signals;
- a second offset value calculator which calculates a second offset value based on the gain and the first offset value;
- a linear gain calculator which calculates a linear gain from a size of at least one of the output signals from the output signal converter;
- a third offset value calculator which calculates a third offset value in consideration of the linear gain and the second offset value;
- an offset adder which adds the third offset value to one of the output signals from the output signal converter;
- and
- a compensation gain calculator which calculates a compensation gain in consideration of a size of the output signal to which the third offset value is added,
- wherein the compensation gain is added to another one of the output signals except the output signal to which the third offset value is added.
An apparatus for enhancing a color temperature of an image to be displayed on a display in accordance with input image signals, the apparatus comprising:
- an output signal converter which converts the input image signals to first, second, and third output signals;
- an offset value calculating unit generating an offset value according to the input image signals;
- an offset adder which adds the offset value to the first output signal;
- and
- a compensation gain calculator which calculates a compensation gain according to the first output signal and the offset value and combines the compensation gain and the second output signal.
Dependencies are inferred from the claim text.