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US 8,275,199 B2Granted
Color processing apparatus and color processing method
AssigneeCanon Kabushiki Kaisha
InventorKei Tamagawa
Life of this patent
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Abstract
Upon creating a color conversion table from a first color space to a second color space, a reversal region where hues are reversed is detected from at least one color gamut in step S2, and the reversal region is corrected in step S3. Mapping is done based on the corrected color gamut in step S4, thereby creating an appropriate color conversion table that suppresses any hue reversal.
Claims13
A color processing apparatus comprising:
- an acquisition unit constructed to acquire color gamut information;
- a detection unit constructed to detect a reversal region where tones are reversed at a boundary of a color gamut indicated by the color gamut information, wherein the tones are reversed from a first point on the boundary of the color gamut to a second point on the boundary of the color gamut;
- a correction unit constructed to correct the color gamut based on the detected reversal region;
- and
- a gamut mapping unit constructed to execute gamut mapping for input colors based on the corrected color gamut.
2 more elements
A color processing method comprising:
- an acquisition step of acquiring color gamut information;
- a detection step of detecting a reversal region where tones are reversed at a boundary of a color gamut indicated by the color gamut information, wherein the tones are reversed from a first point on the boundary of the color gamut to a second point on the boundary of the color gamut;
- a correction step of correcting the color gamut based on the detected reversal region;
- and
- a gamut mapping step of executing gamut mapping for input colors based on the corrected color gamut.
2 more elements
A non-transitory computer-readable storage medium storing a program for making a computer execute:
- an acquisition step of acquiring color gamut information;
- a detection step of detecting a reversal region where tones are reversed at a boundary of a color gamut indicated by the color gamut information, wherein the tones are reversed from a first point on the boundary of the color gamut to a second point on the boundary of the color gamut;
- a correction step of correcting the color gamut based on the detected reversal region;
- and
- a gamut mapping step of executing gamut mapping for input colors based on the corrected color gamut.
2 more elements
Dependencies are inferred from the claim text.