基于频域线性拟合的数字水印算法  

Rotation Resilient Watermarking Algorithm Based on Frequency Domain

作　　者：丁莹[1] 袁源[1] 袁道华[1] 李炳法[1] 

机构地区：[1]四川大学计算机学院,四川成都610065

出　　处：《计算机应用研究》2006年第3期79-81,84,共4页Application Research of Computers

摘　　要：在分析了现有的抗几何攻击的水印技术的基础上,提出了一种DFT-DCT变换域下抗几何攻击,尤其是能有效地抗旋转攻击的数字水印算法。这种算法主要的特点是:方法简单、易于实现;不需添加模板和特征值;隐藏的信息量大;应用直线拟合实现图像经旋转后的配准;除了可以有效抵抗旋转攻击,还可以抵抗裁剪,以及伴随裁剪的旋转、压缩等攻击,具有较高的鲁棒性。This paper gave the analysis of geometric distortion, and proposed a robust watermarking algorithm against geometric distortion, especially rotation distortion, based on frequency domain. This algorithm was simple and realized easily. It needn＇t embed template or eigenvalue. It could hide a large number of information. It could do image registration efficiently with beeline simulation. Besides rotation resilient, it was also robust against cropping, cropping with rotation and compressing.

关 键 词：抗旋转 数字水印 图像配准 直线拟合 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]