Patent ID: 7692811
Filing Date: 2010-04-06
Classification: H04N

Abstract:
1. An image forming method, performed by an image forming apparatus, the method comprising: reading a printed material to provide an image data thereof, the printed material including an image of an original, an additional image and a code representing information, the additional image being not recognizable or difficult to recognize by the naked eye of an observer, the additional image being visualized when an image is formed based on the image data with the image forming apparatus; detecting the code of the printed material; determining if a part of the additional image, visualized when a reproduction of the image is produced, is defective or difficult to be recognized; synthesizing a stamp image with the image data based on the detected code if it is determined that a part of the additional image, visualized when a reproduction of the image is produced, is defective or difficult to be recognized in the reproduction of the printed material; and providing the image data synthesized with the stamp image.