基于小波包变换的数字水印算法  

Digital Watermarking Algorithm Based on Wavelet Package Transform

作　　者：刘益玲[1] 倪文清[2] 方泳泽[1] 

机构地区：[1]集美大学计算机工程学院,福建厦门361021 [2]集美大学理学院,福建厦门361021

出　　处：《集美大学学报（自然科学版）》2007年第4期351-355,共5页Journal of Jimei University：Natural Science

基　　金：福建省自然科学基金资助项目(A0440006);厦门市科技项目(3502Z20055028)

摘　　要：提出一种基于小波包变换的改进的数字水印算法,该算法首先对载体图像进行小波包分解,并统计各子图的大系数的比例,进而在系数比例较大的几个子图中,按照大系数嵌入大的系数,小系数嵌入小的系数的方法进行水印嵌入.仿真实验结果表明本数字水印算法具有较好的稳健性和不可感知性.An improved digital watermarking algorithm based on wavelet package transform was proposed.At first,the arithmetic disassembles the cover-image by wavelet package transform,and calculates the proportion of large coefficient of sub-images respectively.Secondly,watermarking was embedded into the several sub-images with biggest proportion of coefficient by way of embedding big coefficient into big coefficient and small coefficient into small coefficient.Experiment results showed that the watermark generated wi...

关 键 词：数字水印 小波包变换 子图 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]