Provided is an image processing apparatus that can accurately and efficiently reduce color unevenness that occurs in a color image, which is formed by color mixture of a plurality of different types of inks, due to a variation in ejection characteristic among nozzles. The inks are respectively ejected from the nozzle arrays to print patches; regions where color correction for test color images should be performed are specified; a different types of color correction processing for color signals corresponding to the color correction regions are performed to print color correction patches; a color correction patch to be used is selected; on the basis of selected color correction processing, a table parameter corresponding to a nozzle is formed; when the plurality of color correction patches are formed, only correction candidate values having larger color differences than a predetermined threshold value in a uniform color space are generated for color signals.