A multi-bit digital watermarking algorithm with side information

In this paper, a multi-bit digital watermarking algorithm with side information has been proposed, which use the max linear correlation value between the corresponding blocks of cover work and watermarking coding signals as the side information to optimize the embedding region and detection critical value; use the linear correlation value between the cover work and watermark coding signals as side information to adjust the intensity of watermarking embedding in order to improve the effectiveness of watermark system; use the perceptual character of cover work as side information participate in the watermarking coding and embedding process to control the fidelity of watermark system. The result of test indicates that the algorithms which are composed here can not only effectively improve the effectiveness of watermark system but also own the better robustness.