1. An image processing device comprising: an acquisition section which acquires subject image information to be formed on a medium having a first side and a second side; an extraction section which selectively extracts a part of the subject image information to be formed on the second side, the part corresponding to a portion of the subject image information not formed on the first side due to a plurality of holes on the first side of the medium, wherein the part of the subject image information formed on the second side corresponds to positions of the plurality of the holes on the first side; a generation section which generates new subject image information by generating a command for forming the extracted part of the subject image information on the second side; and a forming section which forms the new subject image information on the second side based on the generated command.