Color conversion table creation method, non-transitory computer readable recording medium stored with color conversion table creation program, and color conversion table creating apparatus

摘要

Provided is a color conversion table creation method for creating a color conversion table for an image forming apparatus which forms an image by performing, on an input color value with total use amount of color material exceeding set amount, a process for reducing the total use amount of color material, the table presenting correspondence between the input color value input to the image forming apparatus and an output color value in a device-independent color space. The method includes: acquiring an input color value of a patch image for creating the table; when the total use amount of color material defined by the acquired input color value is around the set amount, adjusting the input color value to have a smaller difference between the total use amount and the set amount; and creating the color conversion table using the patch image with the adjusted input color value.

主权项

1. A color conversion table creation method for creating a color conversion table for an image forming apparatus which forms an image by selectively performing, on an input color value with total use amount of color material exceeding set amount, a process for reducing the total use amount, the color conversion table presenting correspondence between the input color value input to the image forming apparatus and an output color value in a device-independent color space indicating an output color to be output from the image forming apparatus and corresponding to the input color value, the color conversion table creation method comprising the steps of:
(a) acquiring an input color value of a patch image to be used for creating the color conversion table; (b) determining whether or not the total use amount of color material defined by the input color value acquired in the step (a) is around the set amount; (c) when it is determined in the step (b) that the total use amount of color material is around the set amount, adjusting the input color value of the patch image so that difference between the total use amount and the set amount would be smaller; and (d) creating the color conversion table by using the patch image with the input color value adjusted in the step (c).