基于双正交小波变换和图像复杂度的水印算法  

Watermarking algorithm based on bi-orthogonal discrete wavelet transform and image complexity model

作　　者：董学枢[1] 

机构地区：[1]江海职业技术学院,江苏扬州225101

出　　处：《微型机与应用》2014年第21期39-41,44,共4页Microcomputer & Its Applications

摘　　要：数字水印技术是一门将数字信息嵌入多媒体数据并能提取的一门技术。本文提出一种基于双正交小波变换和图像复杂度的可逆水印算法。该算法对原始图像进行双正交离散小波变换后分解成频带,基于熵的值决定嵌入频带,通过图像复杂度的五个特征值决定嵌入位置。仿真结果表明,该算法取得良好的效果,且能较好地抵抗模糊、噪声、锐化等滤波操作,具有良好的鲁棒性。Image watermarking is a technique that can attach hidden data into the image. An image watermarking algorithm based on biorthogonal DWT and image complexity model is proposed in this paper.The image applied biorthogonal DWT to decompose into bands,the best band is embedding with the help of entropy, the best locations in the selected band are found using the image complexity model.Expermiental results show that the proposed algorithm is robust that is evaluated with the aid of different filtering techniques and good results were achieved in all cases.

关 键 词：双正交小波变换 熵 图像复杂度 鲁棒性 PSNR NC 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]