基于DWT的鲁棒性数字图像水印技术  

Robust Digital Image Watermark Based on DWT

作　　者：余俊[1] 

机构地区：[1]青岛大学自动化工程学院,山东青岛266071

出　　处：《华东理工大学学报（自然科学版）》2008年第3期405-409,共5页Journal of East China University of Science and Technology

基　　金：国家自然科学基金项目(60602040);教育部博士点专项基金项目(20051065002)

摘　　要：提出了一种新的鲁棒性数字图像盲水印处理方案。该方案先对载有版权信息的二值图像进行扩展、置乱等处理,生成水印;再对宿主图像进行小波多分辨率分解,将水印嵌入到小波的中频子带。在水印提取过程中采用独立分量分析技术,并进行置乱恢复、扩展恢复等处理。该方案与其他方案的重要区别在于提出了独特的扩展处理方法,从而极大地提高了算法的鲁棒性。实验结果表明:对于水印基准测试软件Checkmark的各种攻击,该方案具有较强的鲁棒性。A new robust digital image blind watermark scheme is proposed. This scheme uses extension and scrambling technique to generate watermark from copyright message binary image. Then the original image is decomposed by MRA, and watermark is embedded into middle frequency at LH and HL sub-bands. The watermark extraction process adopts independent component analysis and includes de-scrambling and de-extension. The difference between this scheme and others is that especial extension method is presented, thus the robustness of this scheme is improved greatly. The experimental results show that this scheme is robust against various attacks of Checkmark benchmarking software.

关 键 词：数字水印 离散小波变换 多分辨率分析 独立分量分析 鲁棒性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]