Device and method for generating color conversion correction data, image forming apparatus, and non-transitory recording medium

A method for forming an image by using color conversion correction data, comprising:

• acquiring first chromaticity values obtained from conversion target image data and second chromaticity values of sample image data, the conversion target image data being image data to be subjected to color conversion, the sample image data being obtained by reading a printed sample;
• curve-fitting chromaticity value correspondence data to generate color conversion correction data, the chromaticity value correspondence data being data in which the acquired first chromaticity values and the acquired second chromaticity values are associated with each other;
• outputting the color conversion correction data for correcting image data obtained by subjecting the conversion target image data to the color conversion,
• performing color conversion on the conversion target image data to be subjected to color conversion by using the color conversion correction data output from the color conversion correction data generation device and a color conversion table;
• and
• forming an image based on the image data to which the color conversion is applied
• wherein
• the first chromaticity values and the second chromaticity values are each grouped into a plurality of chromaticity groups, and
• the method further comprises generating and outputting the color conversion correction data for each of the plurality of chromaticity groups of the first chromaticity values and each of the plurality of chromaticity groups of the second chromaticity values.

A non-transitory recording medium which, when executed by one or more processors, causes the processors to perform a method for forming an image by using color conversion correction data, comprising:

• acquiring first chromaticity values obtained from conversion target image data and second chromaticity values of sample image data, the conversion target image data being image data to be subjected to color conversion, the sample image data being obtained by reading a printed sample;
• curve-fitting chromaticity value correspondence data to generate color conversion correction data, the chromaticity value correspondence data being data in which the acquired first chromaticity values and the acquired second chromaticity values are associated with each other;
• and
• outputting the color conversion correction data for correcting image data obtained by subjecting the conversion target image data to the color conversion,
• performing color conversion on the conversion target image data to be subjected to color conversion by using the color conversion correction data output from the color conversion correction data generation device and a color conversion table;
• and
• forming an image based on the image data to which the color conversion is applied
• wherein
• the first chromaticity values and the second chromaticity values are each grouped into a plurality of chromaticity groups, and
• the method further comprises generating and outputting the color conversion correction data for each of the plurality of chromaticity groups of the first chromaticity values and each of the plurality of chromaticity groups of the second chromaticity values.