Patent ID: 7813576

Claim:
An image processing apparatus comprising: an inter image calculating means for performing inter image calculations to derive differences between two images of a single subject to obtain a difference image that represents the differences between the two images, wherein: process confirmation data representing whether an image has undergone image processes is attached to each of the two images, and image processing condition data representing image processing conditions are further attached to the images which have undergone image processes; the image processing apparatus further comprising: a judgment means for judging whether the two images have undergone image processes, based on the process confirmation data attached to each of the two images; and a correction means for correcting an image which has been judged to have undergone image processes, to correct the image to a state equivalent to its original state prior to the image processes, based on the image processing condition data attached thereto; wherein: the inter image calculation means performs the inter image calculation employing the corrected image, for the image which has been judged to have undergone image processes.