1. An image processing device, comprising: a target specification unit for specifying, in a combined image where a cover image is superposed on an original image such that a second text rendered in the cover image overlaps a first text rendered in the original image, a correction target part that is within a part constituting the first text and is not covered by a part constituting the second text, and an output unit for outputting data designating the correction target part specified to a correction unit for correcting a color attribute of a correction target part in an image, being correlated with the combined image.