Patent ID: 7973987

Claim:
An image copying apparatus comprising: an image scanning unit including a first scanning unit arranged to scan a first side of a document and generate image data, and a second scanning unit arranged to scan a second side of the document and generate image data; an image forming unit arranged to form an image on a recording medium in accordance with the image data generated by the image scanning unit; a target data acquiring unit arranged to acquire target data from recorded side image data generated by the image scanning unit by scanning a test chart recorded side of a test chart document; a target data saving unit arranged to save the target data; an adding unit arranged to add data displaying a specification image specifying which scanning unit of the first and second scanning units has scanned the test chart recorded side to the recorded side image data; a sampling data acquiring unit arranged to acquire sampling data from copied side image data generated by the image scanning unit by scanning a test chart copied side of a copy of the test chart document including the specification image added to the recorded side image data; a specifying unit arranged to specify which scanning unit of the first and second scanning units has scanned the test chart recorded side based on a portion of the specification image of the copied side image data; a sampling data saving unit arranged to save, when the scanning unit that has scanned the test chart copied side matches the scanning unit specified by the specifying unit, the sampling data acquired by the sampling data acquiring unit; and a correcting unit arranged to correct the image data generated when a normal document is copied on the basis of a correcting feature generated from the target data saved in the target data saving unit and the sampling data saved in the sampling data saving unit.