Color conversion apparatus, color conversion method, and recording medium
AssigneeFUJIFILM Corporation
InventorTsuyoshi Matsumoto
Life of this patent
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Abstract
Device color signals are converted such that a total amount of used color materials in the first image area, in which image granularity is more important, is not reduced from a total amount before the device color signals are converted, and/or such that a total amount of used color materials in the second image area, in which cost of the used color materials is more important, is not increased from a total amount before the device color signals are converted.
Claims16
A color conversion apparatus for converting colors of a print that is produced using a plurality of color materials, comprising:
- a color signal input unit for inputting device color signals associated with respective amounts of the color materials;
- an image area extractor for extracting a first image area in which image granularity is more important and/or a second image area in which cost of used color materials is more important, from among an image area represented by the device color signals input by the color signal input unit;
- and
- an isochromatic converter for converting the device color signals representing the image area into new device color signals, so that the new device color signals will fall within an isochromatic range in a device-independent color space,
- wherein the isochromatic converter converts the device color signals such that a total amount of used color materials in the first image area extracted by the image area extractor is not reduced from a total amount before the device color signals are converted, and/or such that a total amount of the used color materials in the second image area extracted by the image area extractor is not increased from a total amount before the device color signals are converted.
A color conversion method for converting colors of a print that is produced using a plurality of color materials, comprising using a computer to perform the steps of:
- inputting device color signals associated with respective amounts of the color materials;
- extracting a first image area in which image granularity is more important and/or a second image area in which cost of used color materials is more important, from among an image area represented by the device color signals that have been input;
- and
- converting the device color signals representing the image area into new device color signals, so that the new device color signals will fall within an isochromatic range in a device-independent color space,
- wherein the step of converting comprises the step of converting the device color signals such that a total amount of used color materials in the extracted first image area is not reduced from a total amount before the device color signals are converted, and/or such that a total amount of the used color materials in the extracted second image area is not increased from a total amount before the device color signals are converted.
A non-transitory recording medium storing a program for converting colors of a print that is produced using a plurality of color materials, the program enabling a computer to function as:
- a color signal input unit for inputting device color signals associated with respective amounts of the color materials;
- an image area extractor for extracting a first image area in which image granularity is more important and/or a second image area in which cost of used color materials is more important, from among an image area represented by the device color signals input by the color signal input unit;
- and
- an isochromatic converter for converting the device color signals representing the image area into new device color signals, so that the new device color signals will fall within an isochromatic range in a device-independent color space,
- wherein the isochromatic converter converts the device color signals such that a total amount of used color materials in the first image area extracted by the image area extractor is not reduced from a total amount before the device color signals are converted, and/or such that a total amount of the used color materials in the second image area extracted by the image area extractor is not increased from a total amount before the device color signals are converted.
Dependencies are inferred from the claim text.