Patent ID: 7607747

Claim:
A printing device including a printing head having a plurality of printing elements arranged generally in a line to form an image on a medium, the printing device comprising: an image data obtaining unit that obtains image data including pixel data corresponding to a plurality of pixels forming the image; a correction information storage unit that stores correction information, the correction information being based on a density change of dots formed by the printing head for pixel data having the same value in the line of the printing elements, the correction information also being used for correcting density variations in the direction along the line, between dots printed by the printing elements; a printing data producing unit that produces printing data corresponding to the image data; and a printing unit that prints the image on the medium by the printing head based on the printing data, the printing data producing unit producing printing data based on the image data and the correction information so that the density of dots, printed by the printing elements, varies continuously across adjacent printing elements along the entire line of printing elements substantially according to at least one of a linear, quadratic, and elliptical function.