利用DCT与LWT域的多功能水印研究  

Multi-functional Watermark Combines DCT Domain and LWT

作　　者：何涨桔[1] 唐向宏[1] 郑琴[1] 甘一鸣[1] 

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2013年第5期130-133,共4页Journal of Hangzhou Dianzi University：Natural Sciences

摘　　要：该文提出了一种基于多变换域的多功能水印算法。首先通过量化DCT系数嵌入鲁棒水印以保护版权,然后在提升小波域的最低有效位嵌入脆弱水印以检测篡改。仿真实验结果表明,算法具有良好的不可见性。对于加噪、滤波、JPEG压缩等常规攻击,剪切、缩放等几何攻击有较强的抗攻击能力,并能较好地检测出对图像的细微篡改。This paper proposes a kind of multifunction watermarking algorithm based on mult-transform-domain. Firstly quantify DCT coefficients to embedding robust watermarking to protect copyright, then embed fragile watermarking in least significant bit （LSB） to detect tampering. Simulation results show that the algorithm has good invisibility. For normal attacks, such as adding noise, filtering, JPEG, etc. , and geometric attacks, such as shear, scaling, etc. , the algorithm has good robustness and can detect the subtle alteration.

关 键 词：离散余弦变换 提升小波变换 多功能水印 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]