1. An image processing device comprising: a pattern type determination unit which correlates color information of an image with a predetermined pattern; a region setting unit which sets a predetermined region of the image as an area for applying the predetermined pattern; an image data generation unit which creates image data which includes the image and the predetermined pattern; and a correction unit which corrects a position of a characteristic portion of the predetermined pattern with respect to the predetermined region, wherein, when the position of the characteristic portion is corrected, a symmetrical center of the characteristic portion approaches the center of the predetermined region.