摘要
提出了一种基于离散小波变换的数字水印算法,水印采用有意义的二值图像.该算法是基于块的离散小波变换,即将原始图像和水印都分块后,再对各个块进行小波变换,利用混沌发生器将水印各块置乱后嵌入到图像的中频部分.试验结果表明,该算法具有较好的不可感知性和鲁棒性.
The digital watermarking technology is an important method for digital product fight protection. A digital watermarking algorithm based on discrete wavelet transformation is proposed, and the watermarking is a significant 2-bit image. The algorithm is based on the DWT of block, i. e. , both the original image and the original watermarking can first be divided into blocks, then into the blocks using the DWT, the watermarking blocks can be permuted by the chaotic machine and the watermarking information can be embedded. Experiments results show that this algorithm leads to good invisibility and robustness.
出处
《长沙理工大学学报（自然科学版）》
CAS
2006年第1期58-61,共4页
Journal of Changsha University of Science and Technology:Natural Science
基金
湖南省自然科学基金资助项目(03JJY3101)
关键词
离散小波变换
数字水印
图像
不可见性
discrete wavelet transformation （DWT）
digital watermarking
image
invisibility
