To reduce the capacity of a memory in use and to decrease the processing time by conducting a processing to magnify a multi-value image and a processing to binarize the magnified multi-value image in the unit of lines up to an end position of the image in parallel.

The image print system of this invention where a generated multi-value image in matching with the resolution of a printer is magnified and the magnified image is binarized by each print process color to drive a print head for desired printing, consists of a magnification processing section 1241 that applies magnification processing to the multi-value image, a binary processing section 1242 that applies binary processing to the magnified multi- value image, and a control section 1243 that conducts the magnification processing of the multi-value image by the magnification processing section 1241 and the binary processing of the image magnified by the binary processing section 1242 in the unit of lines up to the end position of the image in parallel.