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; 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.