一种基于DWT-HD-SVD的数字图像水印算法  

A Digital Image Watermarking Algorithm based on DWT-HD-SVD

作　　者：张丽艳[1] 温万钦 ZHANG Liyan;WEN Wanqin(School of Electrical and Information Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学电气信息工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2022年第6期105-109,115,共6页Journal of Dalian Jiaotong University

基　　金：辽宁省教育厅科学研究计划资助项目(JDL2020029);大连市重点科技研发计划资助项目(2022YF11GX008)。

摘　　要：为了防止数字作品在网络传输中被盗用,提出一种基于DWT-HD-SVD的图像水印算法.在嵌入过程中通过多级小波变换将宿主图像分解成多个子带,然后将得到的子带系数用作HD分解的输入,同时对水印图像进行奇异值分解运算,最后通过恰当的嵌入强度将水印嵌入到宿主图像中.通过相应的提取算法,将水印提取出来并加以分析验证.实验结果表明:所提出的图像水印算法在隐蔽性和鲁棒性之间取得了很好的平衡,且鲁棒性较相关的算法有所提升,对于嵌入多种尺寸的水印也得到了较好的仿真性能.To prevent digital works from being pirated and abused in network transmission,an image watermarking algorithm based on DWT-HD-SVD is proposed.The host image is decomposed into multiple sub-bands by multi-stage wavelet transform during the embedding process,and the sub-band coefficients are used as the input of hessenberg decomposition.Meanwhile,singular value decomposition is performed on the watermark image,and the watermark is embedded into the host image by appropriate embedding intensity factor.Through the corresponding extraction algorithm,the watermark is extracted and analyzed.Experiment results show that the proposed image watermarking algorithm achieves a good balance between concealment and robustness,and good simulation performance is also obtained for embedding multiple sizes of watermark.

关 键 词：数字图像水印 离散小波变换 Hessenberg分解 奇异值分解 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]