Image processing system and method for improved color conversion
AssigneeToshiba Tec Kabushiki Kaisha
InventorHiroyuki Okuyama
Life of this patent
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Abstract
A system and method for processing image data generates color image data from a scanned image, the color image data including RGB data, converts the RGB data to CMY data, and translates the CMY data for the pixel to CMYK data. A weighting coefficient is set for a pixel based on the values of the CMY data for the pixel. A particular region in which the pixel is located is identified as a black color region or a non-black color region. The value of the K data for the pixel is altered based on the weighting coefficient if the particular region is a non-black color region.
Claims27
A method for processing image data, comprising:
- generating color image data from a scanned image, the color image data including RGB data;
- converting the RGB data to CMY data;
- translating the CMY data for the pixel to CMYK data;
- setting a weighting coefficient for a pixel based on the values of the CMY data for the pixel;
- identifying a particular region in which the pixel is located as a black color region or a non-black color region;
- and
- altering the value of the K data for the pixel based on the weighting coefficient if the particular region is a non-black color region.
A computer system for processing image data, comprising:
- a processor;
- and
- a memory, coupled to the processor, the memory comprising a plurality of instructions executed by the processor, the instructions configured to:
- generate color image data from a scanned image, the color image data including RGB data;
- convert the RGB data to CMY data;
- translate the CMY data for the pixel to CMYK data;
- set a weighting coefficient for a pixel based on the values of the CMY data for the pixel;
- identify a particular region in which the pixel is located as a black color region or a non-black color region;
- and
- alter the value of the K data for the pixel based on the weighting coefficient if the particular region is a non-black color region.
A computer readable medium operable on a computer system configured to process image data, the computer readable medium configured to:
- generate color image data from a scanned image, the color image data including RGB data;
- convert the RGB data to CMY data;
- translate the CMY data for the pixel to CMYK data;
- set a weighting coefficient for a pixel based on the values of the CMY data for the pixel;
- identify a particular region in which the pixel is located as a black color region or a non-black color region;
- and
- alter the value of the K data for the pixel based on the weighting coefficient if the particular region is a non-black color region.
Dependencies are inferred from the claim text.