【作者】 盛潭； 赵秀萍；

【Author】 SHENG Tan a , ZHAO Xiuping b Tianjin University of Science and Technology, China

【机构】 天津科技大学；

【摘要】 本文将Arnold变换理论与奇异值分解理论相结合,并将其引入小波域数字水印算法研究。实验中,我们利用置乱的水印图像来修改原始载体图像小波变换后的低频逼近子图来嵌入水印。仿真实验证实该算法可以很好的完成水印的嵌入与提取。水印嵌入前后,载体图像无视觉上的差别,这表明该算法的水印不可见性良好;嵌入水印后的图像在经过多种算法和几何攻击后仍能提取出水印信息,说明该算法的水印鲁棒性较好。该研究在数字产品版权保护以及防伪印刷中具有一定的应用价值。更多还原

【Abstract】 In this paper, Arnold transform and Singular Value Decomposition(SVD) are combined to be introduced into the research of wavelet domain digital watermarking algorithm.During experiment,we embed the watermark through modifying the singular value of low-frequency domain of host image with the scrambled watermark information.The simulation experiments show that the algorithm realizes the embedding and extraction of watermark smoothly. There is no visual difference between watermarked image and original host image can be found by naked eye,that means the invisibility of the algorithm is well; the watermark still can be extracted after several kinds of algorithm and geometric attacks,that means the robustness of the algorithm is acceptable.The research has a certain value in the digital copyright protection and security printing.更多还原