Patent ID: 11968347
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. An image processing method comprising:
acquiring original data of a print target of a print unit, which is formed by one page or a plurality of pages;
dividing the original data into a plurality of partial original data including at least a first partial original and a second partial original;
deciding a first color mapping method to a print color gamut for the first partial original based on a pixel value included in the first partial original and the print color gamut of the print unit;
deciding a second color mapping method to the print color gamut for the second partial original based on a pixel value included in the second partial original and the print color gamut of the print unit;
performing color conversion of the first partial original by the first color mapping method;
performing color conversion of the second partial original by the second color mapping method decided by the decision unit; and
setting a color gamut of a partial original corresponding to the partial original data,
wherein each of the first color mapping method and the second color mapping method is a color mapping method from the color gamut of the partial original data to the print color gamut, and
in the setting of a color gamut, the print color gamut is set as a default color gamut, and if a pixel value of the partial original data is outside the print color gamut, the default color gamut is expanded such that the default color gamut includes the pixel value outside the print color gamut, and the expanded color gamut is set as the color gamut of the partial original corresponding to the partial original data.