Method for creating scanner profile, method for creating device profile, method for acquiring color value, image reading system, and image forming apparatus

摘要

A method for creating a scanner profile according to the present invention includes the steps of: by reading, by a scanner, a printed material of chart image data comprising a plurality of patches which are composed of C, M, Y, K values and differentiated in color and density from each other, acquiring a first color value for the patches; acquiring a K value for the patches of the chart image data; acquiring a second color value for the patches by color-measuring the printed material by the colorimeter; and creating a scanner profile describing a relationship of the second color value to the first color value and the K value, based on the acquired first color value, K value, and second color value for each of the plurality of patches.