Patent ID: 9296230
Filing Date: 2016-03-29
CPC Classification: B41J,G06K

Claim Text:
1. A data processing apparatus for printing an image of a predetermined area on a print medium by a plurality of overlapping printing scans with respect to the predetermined area including a forward scan and a backward scan of print heads that eject a plurality of colors of inks respectively, based on print data, the data processing apparatus comprising: a unit configured to prepare a mode A in which dots will be printed evenly by both of the forward scan and the backward scan in an area corresponding to a pixel and a mode B in which dots will be printed only by the forward scan or the backward scan in an area corresponding to a pixel; a print ratio setting unit that sets the number of pixels to which mode A is allocated and the number of pixels to which mode B is allocated in the predetermined area comprising a plurality of pixels based on the multi-value image data of the plurality of pixels such that a ratio of the number of pixels allocated to mode B to the number of pixels allocated to mode A becomes greater as a degree of color unevenness due to an order of applying ink on the print medium, that can occur about the predetermined area by printing based on the multi-value image data, becomes larger; and a print data generation unit that generates the print data for the forward scan at the predetermined area and the print data for the backward scan at the predetermined area by allocating mode A or mode B to each of the plurality of pixels of the predetermined area based on the number set by the print ratio setting unit.