1. An image processing apparatus, comprising: an image-scanner; an image processor; an unprocessed image storage that stores unprocessed images that are images of documents scanned by the image-scanner; a processed image storage configured to store processed images that are images after image processing executed by the image processor on the scanned documents; a display configured to display the processed images; and an image corrector configured to correct the unprocessed images, wherein: when the image-scanner continuously scans a plurality of documents, continuous scanning of the documents by the image-scanner and image processing of the scanned documents by the image processor are performed in parallel with each other; the unprocessed image storage adds on each of the unprocessed images unprocessed image identification information serving as unique identification information of each unprocessed image and stores the unprocessed images with the unprocessed image identification information; the processed image storage adds on each of the processed images processed image identification information serving as unique identification information of each processed image and stores the processed images with the processed image identification information; and at least one of the display and the image corrector is configured to select an image corresponding to any one or both of unprocessed image identification information and processed image identification information based on any one or both of the unprocessed image identification information and the processed image identification information.