LINE PRINTER, HALFTONE PROCESSING METHOD, DITHER MASK FORMING METHOD, HALFTONE PROCESSING PROGRAM, RECORDING MEDIUM AND DITHER MASK

摘要

PROBLEM TO BE SOLVED: To obtain a line printer having a plurality of printing heads arranged over a printing range, which suppresses deterioration of printing image quality even when positional deviation arises between the printing heads.;SOLUTION: A line head type printer 10 where printing head chips HT1 to HT15 are connected performs printing of image data D by performing halftone processing by using a dither mask stored in a dither mask storage part 52. The dither mask optimized by using an integrated graininess evaluated value that is obtained by assuming a plurality of positional deviation assumption patterns where the direction and distance of the positional deviation of the printing head chips HT1 to HT15 are assumed, and performing weighting to a graininess evaluated value in terms of dot array when the positional deviation in each positional deviation assumption pattern arises is used as the above dither mask.;COPYRIGHT: (C)2009,JPO&INPIT