US Patent 7419238 Printing method, printing apparatus, printing system, and printed medium

The number of correction values used when carrying out a darkness correction line by line is decreased, thereby making it possible to reduce the storage capacity of a storage section storing those correction values. At least one set of correction values determined based on darkness measurement values of lines of a correction pattern printed using a given processing mode is stored, wherein an integer multiple of the number of lines formed in one period is taken as one set, and a darkness correction is carried out through repetitive, sequential correlation with each correction value of said at least one set when printing an image using that processing mode.