Image processing device, image processing method

The present invention relates to an image processing device, an image processing method, a computer-readable image processing program, and a computer-readable recording medium, which are adapted for prevention of illegal copying. In an image processing device which extracts predetermined information from a paper document in which the predetermined information is embedded, and performs a predetermined process in accordance with the extracted information and a request from a user, an attribute judgment unit determines an attribute of the paper document from the extracted information. A certification-information acquisition unit acquires certification information including an attribute of the user. A control unit performs a predetermined process based on the attribute of the paper document and the certification information.