A method for printed image digital watermark using smearing-desmearing transform

摘要

We propose a method for new printed image digital watermark using smearing-desmearing transform. The method is realized by smearing-desmearing transform that can disperse signature information to a whole image. We show that the method has a tolerance for printing out the watermarking image and the signature information is detected from the printed image. It is also showen that this scheme is robust against such the rotation and magnification-reduction in scan.