摘要
为了实现数字图像的版权保护,给出一种基于重要小波树的图像水印算法,利用小波零树思想,在小波变换后的图像中构造重要系数树;水印信号是代表用户版权的二值图像,每位信号采用不同的混沌序列调制后,嵌入到一棵重要小波树中;水印的提取不需要原始图像。实验结果表明,算法不仅具有良好的不可见性,并且对常见的图像处理操作具有较好的鲁棒性。
An image watermarking algorithm based on significant wavelet tree was proposed. With the idea of wavelet zero-tree, significant wavelet trees were constructed from the wavelet transformed images. The binary watermark images with copyright information was embedded into every significant wavelet tree with different chaotic sequences. The extraction of watermark didn＇t need the original carrier images. Experiments show that the watermarked image is invisible and robust to a lot of common image manipulations.
出处
《计算机工程与设计》
CSCD
北大核心
2006年第1期124-125,共2页
Computer Engineering and Design
关键词
数字水印
版权保护
小波零树
扩频
混沌
digital waterrnarking
copyright proteetion
wavelet zero-tree
spread spectrum
chaotic
