一种基于数字版权保护的数字盲水印算法研究  

Study on a blind digital watermarking algorithm based on digital copyright protection

作　　者：张明 顾亚男 

机构地区：[1]中国石油大学(华东)图书馆,山东青岛266580

出　　处：《无线互联科技》2017年第23期106-107,共2页Wireless Internet Technology

摘　　要：文章针对各种数字多媒体版权容易被窃取修改盗用,提出一种改进的基于SVD和DWT变换多子带嵌入的数字盲水印算法。新算法首先对原始载体图像进行分块,运用SVD分解出奇异值和奇异值向量,然后运用DWT变换分成4个子带,将置乱后的水印运用特殊算法嵌入到除了低频子带外的其他3个子带中,最后直接运用阈值的方法将水印提取出来。实验结果表明,与传统的DWT水印算法相比,新算法具有良好的不可见性和鲁棒性,不仅能抵抗裁剪,旋转等几何攻击,而且能有效抵抗噪声、图像灰度值变化等攻击。With a wide variety of digital multimedia copyright modified theft is easy to steal, this paper puts forward an improved blind watermarking algorithm based on SVD and DWT. Firstly, using SVD decomposition to obtain singular values and singular value vector, divides the four subbands using DWT transform, then the scrambling watermark will be embedded in three sub-bands except the low- frequency sub-band according to a special operation. Finally, using a method of threshold to extract the watermark. Experimental results show that compared with the traditional DWT watermarking algorithm, the algorithm has good invisibility and robustness, can not only resist cropping, rotating geometric attacks, but also can effectively resist attacks such as noise, image grey value change.

关 键 词：数字版权 数字盲水印算法 SVD DWT 阈值 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]