Patent ID: 9053407
Filing Date: 2015-06-09
Classification: G06K

Abstract:
1. An image processing apparatus for printing an image on a unit area of a printing medium by performing a plurality of relative scans, which include a first relative scan and a second relative scan, of a printing head with respect to the printing medium that is conveyed in a conveying direction to differentiate a position on the printing medium to which printing is to be performed and processing multi-valued image data for the image to be printed on the unit area, said apparatus comprising: a first division unit configured to divide the multi-valued image data into at least a first multi-valued data for the first relative scan, a second multi-valued data for the second relative scan, and a third multi-valued data for both of the first and second relative scans; a first quantization unit configured to perform quantization processing for each of the multi-valued data divided by said first division unit to generate first, second and third quantized data, respectively; a combination unit configured to combine the first and third quantized data generated by said first quantization unit to generate a first combined quantized data for the first relative scan and to combine the second and third quantized data generated by the first quantization unit to generate a second combined quantized data for the second relative scan; a second quantization unit configured to perform quantization processing for the multi-valued image data to generate quantized data; a second division unit configured to divide the quantized data generated by said second quantization unit into respective quantized data for each of the plurality of relative scans; and a selecting unit configured to select one of a first process, which processes the multi-valued image data by the first division unit, the first quantization unit and the combination unit, and a second process, which processes the multi-valued image data by the second quantization unit and the second division unit, in accordance with a position of the unit area on the printing medium in the conveying direction.