An image processing method has the steps of: scanning respective pages in a document; generating respective pieces of image data corresponding to the pages; identifying respective orientations of isolated images contained by each of the pages according to a result of character recognition for the image data; determining whether or not the isolated images contained by the page have different orientations; assigning respective ones of the isolated images to new pages; and setting respective orientations of the isolated images in the new pages as respective upright orientations of the isolated images.