摘要
随着通信、计算机和网络技术的迅猛发展和广泛应用,信息安全和版权保护问题已引起了社会的广泛关注,而数字水印技术已经成为实现版权保护的有效途径。文中提出了一种基于提升小波变换的盲水印算法,利用提升小波变换将原始图像进行多分辨率分解,根据各个层次相应位置的提升小波系数排序情况和密钥中{1}元素的位置来决定水印嵌入的位置,在水印提取时根据密钥中{1}的位置可以实现盲水印提取。采用水印多重嵌入的方法,将水印嵌入到提升小波分解各个分辨率级的所有子图中,即在低频子图中嵌入一次水印,而在高频子图中嵌入多重水印,这样不仅不易被人眼察觉而且提高了水印嵌入的鲁棒性。这种算法简单、可靠,实验证明具有较好的效果。
With the fast development and abroad application of communication, computer and network technologies, problems of information security and copyright safeguard have raised social attention. And now digital watermark technology is an efficient approach on copy- right safeguard. This paper presents a kind of blind watermarking algorithm based on lifting wavelet transform. The original image is decomposed with lifting wavelet transformed, and the watermark series is embedded depending on every level lifting wavelet coefficients of corresponding locations and the locations of { 1 } in the secret key. The watermark can be extracted according to the locations of { 1 ] in the secret key, and that is blind watermarking extracting. By using multi - watermark technology, the watermark is embedded in every image of all lifting wavelet levels, that is one watermark is embedded in low frequency, and multi - watermark is embedded in higher frequencies. The watermark can＇t be aware easily by eyes, and its robust is improved by using this method. This method is simple and credible, and is proved to have a good robust character by experiments
出处
《计算机技术与发展》
2010年第3期151-154,共4页
Computer Technology and Development
基金
国家重点实验室开放基金项目(SKLRS200702)
关键词
盲水印
提升小波变换
M-序列
blind watemutrk
lifting wavelet transform
M- series
作者简介
贾朱植（1978-），女（满族），辽宁鞍山人，讲师，硕士，研究方向为数字图像处理、图像分割、数字水印技术。
