Image processing apparatus, inkjet printing apparatus, and inkjet printing method

摘要

In a color mode, among clear ink data CL1 and CL2, only the data CL2 is set to a uniform use amount of 20%, while the use amount for the data CL1 is set to zero. Meanwhile, in a monochrome photo mode, the data CL1 indicates a usage of 10% to 40% near a white point, but starting at the intermediate gradations the data CL1 use amount decreases while the data CL2 use amount increases, with a data CL2 use amount of 20% near a black point. In so doing, it is possible to sufficiently suppress bronzing in the color mode where coloring ink data exists, without imparting a particularly strong unnatural look except for specific colors. Meanwhile, in the monochrome photo mode where coloring ink data does not exist, high-level suppression of bronzing is possible, at the cost of a slight reduction in the glossiness of the printed material.

主权项

1. An image processing apparatus for forming an image on a unit area of a print medium by performing a printing operation of a first printing mode and a second printing mode using a print head for ejecting coloring ink comprising coloring material and clear ink to the print medium, said apparatus comprising:
a setting unit configured to set a mode including a first and second mode; and a determining unit configured to determine an use amount of the coloring ink, a first use amount of the clear ink which is an use amount of the clear ink for the printing operation that starts applying the clear ink to the unit area before completing applying the use amount of coloring ink to the unit area, and a second use amount of the clear ink which is an use amount of the clear ink for the printing operation that starts applying the clear ink to the unit area after completing applying the use amount of coloring ink to the unit area, based on an image data representing a color of the image, according to the mode set by said setting unit, wherein said determining unit determines the first use amount and the second use amount, such that a ratio of the first use amount determined based on the image data representing a color of an intermediate gradation image to the second use amount determined based on the image data for the first printing mode is different from a ratio for the second printing mode, and the same type of the clear ink is used in the first printing mode and the second printing mode.