Patent ID: 7419238

Claim:
A printing method for printing an image by repeating a dot formation operation of forming dots on a medium by ejecting ink from a plurality of nozzles moving in a predetermined movement direction and a carrying operation of carrying said medium in an intersecting direction that intersects with said movement direction, thus forming in said intersecting direction a plurality of lines each being made of a plurality of dots lined up in said movement direction, the printing method comprising: printing a correction pattern using a processing mode in which an image is printed so that the nozzles forming said lines change periodically with respect to said intersecting direction; measuring a darkness of said correction pattern, line by line, for at least one set of lines, wherein an integer multiple of the number of lines formed in a single period is taken as one set; generating correction values for said at least one set of lines based on measurement values obtained by measuring the darkness line by line, and storing said correction values; and carrying out darkness correction through repetitive, sequential correlation of each of said correction values in said at least one set when printing an image using said processing mode.