基于LWT-SVD-DCT算法的水印技术  

Watermarking Technique Based on LWT-SVD-DCT

作　　者：李伟 孙云娟[2] LI Wei;SUN Yunjuan(Henan Normal University,Xinxiang 453007,China)

机构地区：[1]河南师范大学电子与电气工程学院,河南新乡453007 [2]河南师范大学新联学院,河南新乡453007

出　　处：《洛阳理工学院学报（自然科学版）》2021年第1期77-81,共5页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

摘　　要：基于提升小波变换(LWT)、奇异值分解(SVD)和离散余弦变换(DCT),提出一种新的盲水印技术方案。首先,将原始图像进行LWT变换,提取LL子带;然后,将子带划分成互不相交的模块进行SVD分解;最后,将正交向量u_(i)进行一维DCT变换得到u_(i),再把二进制水印的每一位嵌入到u_(i)的中频系数中。仿真实验表明:该算法运算速度快,重构图像精确,具有鲁棒性和透明性。A new blind watermarking method is proposed in the paper.The method is based on the theory of LWT,SVD and DCT.Firstly,LWT is performed on the original image and the LL sub-band is obtained.Secondly,SVD is done for the non-overlap blocks of the LL sub-band.Finally,DCT transform is performed to get u_(i) for the orthogonal array u i and per bit of the binary watermark is embedded in the middle frequency coefficients of u_(i).The results show that the method owns high speed and works perfectly on watermark.It is robust and imperceptible.

关 键 词：盲水印技术 提升小波变换 奇异值分解 离散余弦变换 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]