1. An image processing apparatus comprising: a first extractor, configured to extract compression data items of a plurality of images to extraction image data items; a corrector, configured to correct the extraction image data items, when the images are printed on a print medium; a second extractor, configured to extract one of the compression data items to a sample image data item; an acquirer, configured to acquire, from the sample image data item, a characteristic information item indicative of image characteristic to be corrected by the correction, in a case where at least parts of the images to be printed are to be overlapped when viewed from a first direction; and a calculator, configured to calculate correction amounts each of which is to be applied to an associated one of the extraction image data items based on the characteristic information item, wherein the first direction is a direction perpendicular to a transporting direction of the print medium.