Patent ID: 7506949
Filing Date: 2009-03-24
Classification: G06K

Abstract:
1. An inkjet printing apparatus having a first nozzle array and a second nozzle array for discharging given ink, which prints image data in accordance with input data on a printing medium by scanning the first nozzle array and the second nozzle array in a given direction, wherein the first nozzle array is a front-side nozzle array in the given direction and the second nozzle array is a back-side nozzle array in the given direction, and controlling the first nozzle array and the second nozzle array to discharge the given ink, the apparatus comprising: a generation unit adapted to generate printing data to be printed by the first nozzle array and printing data to be printed by the second nozzle array, by thinning the input data using a mask pattern; and a control unit adapted to control the first nozzle array and the second nozzle array to discharge the given ink, based on the printing data generated by said generation unit, wherein said generation unit generates the printing data corresponding to each of the first nozzle array and the second nozzle array using the mask pattern selected from a plurality of mask patterns having different thinning rates, based on type of the printing medium, and the thinning rate upon generating the printing data corresponding to the first nozzle array is not more than the thinning rate upon generating the printing data corresponding to the second nozzle array.