1. An image processing device comprising: an input component configured to input image data; an object dividing component configured to divide the image data into a plurality of objects; a metadata adding component configured to add metadata to each object obtained by the object dividing component; a selecting component configured to select a first object and a second object in accordance with a selecting instruction of a user; a metadata analysis component configured to conduct analysis of the individual metadata of the first object and second object selected by the selecting component; a deciding component configured to decide an update procedure of the metadata of the first object and the metadata of the second object in accordance with an analysis result of the metadata analysis component; and an update component configured to update at least one of the metadata of the first object and the metadata of the second object in the update procedure decided by the deciding component.