应用水印旋转角度加密的双水印算法  

A Dual Watermark Algorithm Using the Encryption of Watermark Rotation Angle

作　　者：吴新亚[1] 陈永红[1] 冯祥斌[1] 

机构地区：[1]华侨大学计算机科学与技术学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2014年第4期397-402,共6页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(61370007);福建省自然科学基金资助项目(2013J01241);华侨大学高层次人才科研启动项目(10Y0199);中央高校科研业务费基金资助项目(JB-ZR1131)

摘　　要：提出一种基于水印旋转角度加密的新型双水印算法.该算法首先分块载体图像,选取预定大小的载体图像子图像作为嵌入可见水印的载体.其次,使用图像旋转算法对待嵌入的可见水印进行微角度旋转处理,用该旋转角度作为其中一个密钥,以此作为验证该可见水印是否为水印信息的手段之一.最后,在除了用于嵌入可见水印的载体图像的其他子块中使用模糊归类的方法,嵌入不可见的鲁棒水印.实验结果证明:该算法嵌入双水印后图像没有明显的降质,合法去除可见水印之后,载体图像也不会出现明显的降质;被恶意篡改之后的可见水印恢复能力强,而鲁棒性水印抵抗JPEG压缩、剪切、高斯噪声、滤波、缩放等常见的信号处理攻击和几何攻击性能良好.A new dual watermarking algorithm based on dual the encryption of watermark rotation angle is proposed. First, the algorithm blocks the original carrier image, and uses a sub-image of the original carrier image to embed the visi- ble watermark. The size of the sub-image is predetermined by the visible watermark. Second, we process the visible wa- termark with the image rotation algorithm, so the rotation angle is used as one of the keys and use it as one of the means to test and verify the watermark information. Finally, the invisible robust watermark is embedded at the remainder origi- nal carrier image based on fuzzy classified. The experimental results show the presented algorithm can embed dual water- mark image without significant degradation, and the carrier image doesnr t appear significant degradation when the visible watermark is removed legally. The visible watermark has a strong recovery performance after tampered, and the robust watermark has a good robustness against common signal processing and geometric attacks such as JPEG compression, cropping, Gaussian noise, filtering, scaling.

关 键 词：图像旋转 双水印 版权水印 模糊归类 自适应 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]