Patent ID: 9396419
Filing Date: 2016-07-19
CPC Classification: G06F,G06K,H04N

Claim Text:
1. A data-processing apparatus comprising a storage device and a controller, the controller being configured to perform: obtaining, from the storage device, a plurality of measurement values defined in a specified color space, the plurality of measurement values being in one-to-one correspondence with a plurality of color values that are defined in a first color space, the plurality of measurement values defining a color range in which the plurality of measurement values are distributed in the specified color space, the color range having an outer layer and including a target color range corresponding to at least a part of a plurality of hue ranges defined in the specified color space, the target color range including a dark color range that is defined by lightness of a maximum chroma measurement value having a maximum chroma among measurement values included in the target color range, a measurement value in the dark color range having lightness value smaller than the lightness of the maximum chroma measurement value, the dark color range including a first color range and a second color range, the first color range including at least a part of the outer layer corresponding to the target color range, the second color range being at least a part of a portion inside the first color range; modifying a part of the plurality of measurement values obtained from the storage device to acquire modified measurement values, the modifying being performed to meet the following conditions (a) and (b): storing the modified measurement values in the storage device; obtaining the modified measurement values from the storage device; and generating color conversion data representing correlations between color values defined in the first color space and color values defined in a second color space by using the modified measurement values obtained from the storage device, each color value that is defined in the second color space representing an amount of colorant used for printing; wherein the second color range includes a first part adjacent to the first color range and a second part separated from the first color range, wherein the modifying is performed to meet a condition that a first ratio is greater than a second ratio, the first ratio being a ratio of change in lightness in the specified color space determined based on the modified measurement values that correspond to the first part to change in lightness in the first color space determined based on measurement values that have not yet been modified and that correspond to the first part, the second ratio being a ratio of change in lightness in the specified color space determined based on the modified measurement values that correspond to the second part to change in lightness in the first color space determined based on measurement values that have not yet been modified and that correspond to the second part.