Image processing apparatus, inkjet printing apparatus and image processing method

摘要

The use amount of clear ink is set to minimize the hue difference Δθs−d from each of the colors corresponding to input signal values. The use amount of the clear ink to provide the minimum hue difference Δθs−d is varied depending on the use amount of color ink used for the color corresponding to the input signal value. A color conversion table having output values of the use amount and ink color data corresponding to the use amount is set. The color conversion in such a relationship is performed, whereby the bronzing color is recognized as a color close to the print color. As a result, undesired bronzing is lessened, so that degradation in image quality can be suppressed.

主权项

1. An image processing apparatus for forming an image by a predetermined color of ink and a clear ink that is a clear material and includes a resin, the predetermined color of ink and the clear ink being applied to a print medium with use of an applying unit, said apparatus comprising:
a determining unit configured to determine applying amounts of the ink and the clear ink to the print medium; and a control unit configured to cause the applying unit to apply the ink and the clear ink to the print medium, based on the applying amounts determined by said determining unit, wherein said determining unit determines the applying amounts so that a hue difference in a L*a*b* space is equal to or less than 90 degrees between a print color measured in a reflected light that does not include a specular reflected light and a bronzing color which is a print color measured in a reflected light that includes the specular reflected light, in a case of performing measuring of the image under a light, the image being formed by applying a predetermined applying amount of the ink and a predetermined applying amount of the clear ink.