摘要
提出了一种基于奇异值分解(SVD)和离散多小波变换(DMWT)的灰度级图像水印算法。该算法先用Arnold变换对灰度级水印进行置乱,再将置乱后的水印分块地嵌入到图像3层多小波变换后的不同中频区域中,嵌入强度由水印块和中频区域的性质共同决定。仿真结果表明,该算法对于JPEG压缩、噪声、滤波、剪切、放缩和旋转等攻击均具有较好的稳健性。
A gray - level image watermarking algorithm is proposed based on SVD and DMWT. In this algorithm, the watermarking is scrambled with the Arnold transform in advance,then it is put into the middle frequency areas partly, the areas can be recived when the original image experienced 3 - level DMWT,the embedding strength is decided by both characters of the watermarking blocks and the middle frequency areas. Simulation results demonstrate that the proposed algorithm has a good robustness to resist some attacks such as JPEG compression, adding noise, filter, resizing, cutting and rotation.
出处
《现代电子技术》
2009年第7期72-75,共4页
Modern Electronics Technique
基金
国家863计划资助项目(2006AA12A113)
