摘要
提出了一种基于遍历矩阵和DWT的图像鲁棒水印新算法。利用指定密钥产生的遍历矩阵对水印图像置乱,再将置乱后水印图像嵌入到宿主图像的深层小波域低频子图,嵌入位置由遍历矩阵确定,嵌入规则基于改进的二值运算方法。水印的检测只需水印置乱密钥和水印嵌入位置密钥。大量仿真实验表明,算法在保持较好鲁棒性的同时,安全性也能有很好的保证。
A novel robust image watermarking algorithm based on ergodic matrix and DWT is proposed. First,utilizing the ergodic matrix generated by specified keys,the bits of watermark are scrambled. Then the scrambled watermark image is embed into the deep wavelet domain of the host image,the embed positions are determined by the ergodic matrix,and the embed rule is determined via the improved binary operation. The original image is not required for detecting the watermarks. The experimental results demonstrate that the algorithm can ensure both robustness and safety of the watermark.
出处
《计算机工程与应用》
CSCD
北大核心
2007年第16期37-40,共4页
Computer Engineering and Applications
基金
湖南省自然科学基金(the Natural Science Foundation of Hunan Province of China under Grant No.06A031)
湖南省教育厅资助科研课题(the research Project of Department of Education of Hunan Province
China under Grant No.06JJ5098)
关键词
遍历矩阵
小波变换
图像置乱
二值运算
鲁棒性
ergodic matrix
wavelet transform
image scrambling
binary operation
robustness
