Patent ID: 9485390
Filing Date: 2016-11-01
CPC Classification: G06K,H04N

Claim Text:
1. A method for creating a color profile that is to be applied to image formation by an ink-jet method using ink of standard colors composed of three or more kinds of colors, and one or more kinds of ink of specific colors acquired by mixing two or more kinds of the ink of the standard colors, the method comprising: a step of creating a first table that defines a conversion relationship from a signal of a first standard color to which limitation of a total amount of ink is not applied, the signal of the first standard color expressing a standard color, into a signal of a second standard color to which the limitation of the total amount of ink is applied; a step of creating a second table that defines a conversion relationship from the signal of the second standard color outputted according to the first table into a first expansion color signal including one or more kinds of signals of specific colors in which the signal of the second standard color and a plurality of signals of standard colors are mixed, to which first expansion color signal the limitation of a total amount of ink is applied; a step of creating a third table that defines a conversion relationship from a color signal in a device-independent color space corresponding to the signal of the second standard color in the first expansion color signal into a color signal in a device-dependent color space based on a conversion relationship from a color signal in the device-dependent color space into a color signal in the device-independent color space, acquired by converting the first expansion color signal outputted according to the second table into a color signal in the device-independent color space corresponding to the first expansion color signal; and a step of creating a fourth table serving as a color profile that defines a conversion relationship from a color signal in the device-independent color space, corresponding to the signal of the second standard color, in the first expansion color signal, into a second expansion color signal including one or more kinds of signals of specific colors mixed with a plurality of signals of standard colors in the device-dependent color space, by using the conversion relationship defined by the third table and the conversion relationship defined by the second table.