Patent ID: 7591525

Claim:
A printing apparatus comprising: a printing head having a plurality of nozzle modules corresponding to various ink colors; an abnormal nozzle specifying unit that identifies an abnormal nozzle from amongst the plurality of nozzle modules, the abnormal nozzle specifying unit identifying the abnormal nozzle based on a position of a dot ejected by the abnormal nozzle and the degree to which the position of the dot deviates from a predetermined dot position; and a density correction unit that corrects a density of a dot printing line ejected by the abnormal nozzle based on information from the abnormal nozzle specifying unit, the density correction unit correcting a density of the dot printing line by adjusting a pitch of the dot printing line of the abnormal nozzle; wherein the density correction unit corrects printing data corresponding to the dot printing line printed by the nozzles including the abnormal nozzle so as to be close to densities of other dot printing lines to be printed by only normal nozzles.