一种基于置换的小波非对称数字水印算法  

An asymmetric digital watermarking algorithm based on permutation in wavelet domain

作　　者：李莹[1] 王哲[2] 

机构地区：[1]陕西工业职业技术学院信息工程学院,陕西咸阳712000 [2]陕西工业职业技术学院图书馆,陕西咸阳712000

出　　处：《电子设计工程》2015年第5期109-111,119,共4页Electronic Design Engineering

基　　金：陕西工业职业技术学院院级科研项目(ZK14-01)

摘　　要：针对对称数字水印方案不能公开验证版权的问题,提出一种基于小波变换的置换非对称数字水印算法。该算法对载体图像进行三层小波分解实现水印的嵌入。嵌入的水印信号包括公开水印和秘密水印两部分。将宿主图像的Hash值作为公钥生成伪随机序列,对原始水印信号进行扩频调制得到公开水印,用于水印的公开检测;将公开水印进行Arnold变换,产生秘密水印,用于对称检测。该算法能够实现水印的盲检测和盲提取,具有较好的鲁棒性和较高的安全性,还能够进行盗版追踪和防止水印伪造。Aiming at the asymmetric digital watermarking schemes cannot verify copyright publicly; we propose an asymmetric digital watermarking algorithm based on permutation in wavelet domain. In this algorithm, the watermark is embedded in the coefficients of three layer wavelet decomposition of the original host image. The embedded watermark consists of two parts：public watermark and secret watermark. The Hash value of the host image as the public key is used to generate pseudo random sequence. The public watermark is got by modulating with spread spectrum on the original watermark signal. It is used to achieve public detection. The public watermark is transformed with Arnold to produce the secret watermark for symmetry detection. This algorithm can realize blind detection and blind extraction of watermark; it is robust and has good security, and also can achieve piracy tracking and prevent watermark forgery.

关 键 词：非对称水印 小波变换 置换 ARNOLD变换 

分 类 号：TN918[电子电信—通信与信息系统]