Patent ID: 8625160

Claim:
A color adjustment method comprising: a color conversion step to obtain an output CMYK value from input image data using a color conversion table to convert the input image data into the output CMYK value, the color conversion table being created based on an output device profile including: a first conversion table to convert an input CMYK value of an output device into an output color value indicating a coordinate on a device-independent color space; and a second conversion table to convert the output color value into the output CMYK value, the second conversion table being created based on: a CMYK value determined by arbitrary C, M and Y values and a K value found from the arbitrary C, M and Y values; and a first relationship between the determined CMYK value and the output color value corresponding to the determined CMYK value, the first relationship being obtained based on a second relationship between the input CMYK value and the output color value of the first conversion table; a color adjustment step to obtain an adjusted CMYK value from the output CMYK value using a color adjustment table to convert the output CMYK value into the adjusted CMYK value, the color adjustment table being created based on the first conversion table and a third conversion table to convert the output color value into the adjusted CMYK value, the third conversion table being created based on: a CMYK value determined by arbitrary C, M and Y values and a K value found from the arbitrary C, M and Y values, and having a first K-CMYK proportion of the K value to the determined CMYK value larger than a second K-CMYK proportion of the K value to the determined CMYK value used when the second conversion table is created; and the first relationship between the determined CMYK value and the output color value corresponding to the determined CMYK value, the first relationship being obtained based on the second relationship between the input CMYK value and the output color value of the first conversion table; and an output selection step to select an image-output CMYK value for the output device to output an image from among the output CMYK value obtained in the color conversion step and the adjusted CMYK value obtained in the color adjustment step.