1. An image processing device comprising: an image input section which reads a plurality of first resolution images of imaging a same object and at least one second resolution image of imaging the same object, the second resolution image having a higher resolution image than the first resolution images; a position discrepancy detecting section which detects position discrepancy of patterns between the respective first resolution images and the second resolution image; and an image composition section which positions and composes patterns for the plurality of first resolution images based on the position discrepancy.