Patent ID: 7520583

Claim:
A printing device comprising: a print head having a plurality of nozzles which can print dots in different sizes; a discharge deviation characteristic information acquirer for acquiring data related to an amount of space between a dot printed by one of the plurality of nozzles and a predetermined target for the dot; an image data acquirer for acquiring M-level image data (M≧3), which includes a plurality of pixel values corresponding to at least three characteristics of the dot, the at least three characteristics including at least one of brightness of the dot and density of the dot; a deviated pixel identifier for identifying a pixel relating to the dot; a pixel value adjuster for adjusting the plurality of pixel values for the pixel identified by the deviated pixel identifier; an N-level data generator for generating N-level data (M>N≧2) in which the plurality of pixel values acquired by the image data acquirer is categorized; a print data generator for generating print data to which the dot has a size corresponding to the respective pixel on the basis of the N-level data; and a printer for executing printing based on the print data generated by the print data generator using the print head.