基于分块奇异值分解的盲水印技术  

A Blind Watermarking Based on Block—SVD

作　　者：陈琼[1] 伍祥生[1] 刘飞[1] 

机构地区：[1]湖南师范大学信息技术系,长沙410081

出　　处：《中国图象图形学报》2007年第9期1558-1561,共4页Journal of Image and Graphics

基　　金：湖南省教育厅项目(04C204)

摘　　要：基于奇异值分解的数字水印方案,具有很强的鲁棒性,但是它也存在着一些不足的地方。为此提出了一种新的基于分块奇异值分解盲水印方法,在图像水印信息经过置乱处理后嵌入到原始载体图像分解所得的酋矩阵中。运用置乱方法和奇异值分解方法,提高了水印的不可见性,保证了水印的安全性。在水印的检测与提取过程中不需要原始载体图像,更加利于实际中的应用。实验结果证明,该方法具有较好的不可见性,对常见的图像处理具有良好的鲁棒性。The existing watermarking based on SVD （singular value decomposition） is robust, but still there are some defects. In this paper, we present a new blind watermarking method based on block-SVD. The Watermarking is embedded into the unitary matrices which are obtained using the singular value decomposition of the source image according to the relationships between the coefficients of the unitary matrices. The implemetation of the scrambling encryption and singular value decomposition methods provides the invisibility and the security of the watermark. This method is not needed the source image during the detection and extraction so that it could be better applied into the practice. Experiments demonstrate that the proposed scheme is invisible and robust against common image processing.

关 键 词：奇异值分解 数字图像水印 ARNOLD变换 盲水印 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]