Development of digital watermarking application technologies for newspapers

Newspapers, no different from other copyrighted works, are protected by the copyright laws. However, as the duplication itself is technically executable without any license agreement, in cases where users are ignorant of the copyright laws or have no intent to honor them, copies of newspapers end up to be illegally produced. In this paper, we report experiments for applying digital watermarking to newspapers. Digital watermarking is utilized to realize copyright management system that prevents illegal duplications while offering great convenience. Watermarking application is achieved in which the embedding artifacts are hardly noticeable and the embedded information extraction is stable.