摘要
在充分考虑图像视觉屏蔽特性的基础上,提出一种小波域图像半脆弱水印算法。嵌入水印基于小波低频子带系数产生,该方案通过自适应地修改小波变换后水平与垂直细节子带系数以嵌入水印,嵌入水印具有较好的透明性。实验结果证明了算法对非恶意攻击的鲁棒性和对恶意攻击的脆弱性。
Based on fully considering the visual masking characteristics of the original image, a semi-fragile watermarking algorithm operating in wavelet domain is presented. The scheme adaptively modifies coefficients of horizontal and vertical sub-bands to embed the content based watermark generated from the approximate sub-band; the embedded watermark has high transparency due to the exploiting of visual masking characteristics. The experimental results have proved the robustness to non-malicious attacks and the fragility to malicious ones.
出处
《通信技术》
2008年第12期347-349,352,共4页
Communications Technology
基金
湖南省教育厅青年项目(04B016)
关键词
数字水印
半脆弱水印
小波变换
图像认证
Digital Watermarking
Semi-Fragile Watermarking
Wavelet Transform
Image Authentication