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US 9,317,939 B2Granted
Method and device for image conversion from RGB signals to RGBW signals
AssigneeBoe Technology Group Co., Ltd.
InventorsFei Yang, Zhongyuan Wu, Danna Song
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Abstract
Provided are a method and device for image conversion from RGB signals to RGBW signals. The method includes the steps of converting RGB input signals as received into corresponding RGB luminance input values respectively; determining RGBW luminance output values respectively according to a position relationship between a corresponding point of the RGB luminance input values and regions divided by RGBW in a chromaticity diagram; and converting the determined RGBW luminance output values into corresponding RGBW output signals respectively and outputting the RGBW output signals.
Claims16
A method for image conversion from RGB signals into RGBW signals, comprising:
- converting RGB input signals as received into corresponding RGB luminance input values respectively;
- determining a color coordinate value and a luminance value of the corresponding point of the RGB luminance input values in the chromaticity diagram;
- determining a position relationship between the corresponding point and a region divided by RGW, a region divided by RBW, and a region divided by GBW in the chromaticity diagram according to the color coordinate value of the corresponding point;
- determining the RGBW luminance output values respectively according to the determined position relationship, a preset luminance adjustment coefficient, the color coordinate value and the luminance value of the corresponding point;
- converting the determined RGBW luminance output values into corresponding RGBW output signals and outputting the RGBW output signals respectively,
- said determining the RGBW luminance output values respectively according to the determined position relationship, a preset luminance adjustment coefficient, the color coordinate value and the luminance value of the corresponding point comprises:
- setting the luminance output value of the blue in the RGBW luminance output values as zero when it is determined that the corresponding point is located in the region divided by RGW;
- setting the luminance output value of the green in the RGBW luminance output values as zero when it is determined that the corresponding point is located in the region divided by RBW;
- and
- setting the luminance output value of the red in the RGBW luminance output values as zero when it is determined that the corresponding point is located in the region divided by GBW.
7 more elements
A device for image conversion from RGB signals into RGBW signals, comprising:
- a processor;
- a converter operating on the processor to convert the RGB signals into corresponding RGB luminance input values respectively;
- a calculator operating on the processor to determine RGBW luminance output values respectively according to a position relationship between a corresponding point of the RGB luminance input values and regions divided by RGBW in a chromaticity diagram;
- an inverse converter operating on the processor to convert the determined RGBW luminance output values into corresponding RGBW signals respectively;
- wherein the calculator comprises:
- an optical calculator operating on the processor to determine a color coordinate value and a luminance value of the corresponding point of the RGB luminance input values in the chromaticity diagram;
- a region selector operating on the processor to determine the position relationship between the corresponding point and a region divided by RGW, a region divided by RBW, and a region divided by GBW in the chromaticity diagram according to the color coordinate value of the corresponding point;
- and
- an luminance calculator operating on the processor to determine the RGBW luminance output values respectively according to the determined position relationship, a preset luminance adjustment coefficient, the color coordinate value and the luminance value of the corresponding point;
- wherein the luminance calculator sets the luminance output value of the blue in the RGBW luminance output values as zero when it is determined that the corresponding point is located in the region divided by RGW;
- sets the luminance output value of the green in the RGBW luminance output values as zero when it is determined that the corresponding point is located in the region divided by RBW;
- and sets the luminance output value of the red in the RGBW luminance output values as zero when it is determined that the corresponding point is located in the region divided by GBW.
9 more elements
Dependencies are inferred from the claim text.