A technique of preventing from falsifying presswork based on zero-watermark
Wei Zhang, Feng Gui, Han Shuang · Microcomputer & its Applications · 2010
Analysing the effect of scanning process on the image, this paper proposes a zero-watermarking algorithm based on DWT and SVD. With the features of printing and scanning, the scheme builds the copyright information using the relation of the maximum singular value of adjacent image sub-blocks and watermark, and the copyright information is registered at last. Experiments show that this algorithm is better robust for printing and scanning and determine the second copy.