Patent ID: 8482800

Claim:
An image processing apparatus for printing an image on a unit area of a printing medium by performing a plurality of relative scans between a printing unit for ejecting inks and the printing medium, said apparatus comprising: a generating unit configured to generate first and second multi-valued data of an image to be printed on the unit area by each of the first and second relative scans of the plurality of relative scans and third multi-valued data of an image to be printed on the unit area by both of the first and second relative scans among the plurality of relative scans, based on the multi-valued image data corresponding to the image to be printed on the unit area, wherein the gradation value of third multi-valued data is determined according to the gradation value of the multi-valued image data; and an obtaining unit configured to obtain a first data used for printing in the first relative scan based on the first multi-valued data and the third multi-valued data and second data used for printing in the second relative scan based on the second multi-valued data and the third multi-valued data.