According to a processing period for OCR processing of image data for character recognition for a given page, the image processing section determines whether or not to generate image data for character recognition for a next page subsequent to the given page in accordance with an image quality setting different from that set for the given page. Upon determining generation in accordance with an image quality setting different from that set for the given page, the image processing section determines the image quality setting for the next page based on document type and size of the given page of the original document. The image processing section generates image data for character recognition for the next page in accordance with the determined image quality setting.