一种基于图像最高有效位构造密钥的零水印算法  

A Non-Watermarking Algorithm Based on the MSB Structure Key

作　　者：牛万红[1] 杨绍华[2] 

机构地区：[1]宁夏大学远程教育学院,宁夏银川750021 [2]宁夏大学数学计算机学院,宁夏银川750021

出　　处：《计算机工程与科学》2010年第4期55-58,共4页Computer Engineering & Science

基　　金：宁夏自然科学基金资助项目(NZ0937);宁夏大学科学研究基金资助项目(ndzr09-47);宁夏大学青年科学基金资助项目(QN200801)

摘　　要：本文提出一种基于最高有效位(MSB)构造密钥的零水印算法,先将二值水印图像置乱并拓展为载体图像的大小,再将其像素值与载体像素的MSB进行对应比较,当比较结果为真时,用一个零矩阵来标记载体像素的位置,被标记过的零矩阵作为密钥来检测水印。由于水印信息遍布载体图像的MSB而且不改变载体图像的信息,使得算法表现出较好的抗攻击性能。实验表明了该算法的有效性。This paper presents a non-watermarking algorithm based on the most significant bits to construct the key. Firstly, the binary watermarking image is scrambled and extended to the size of the main image. Then the value of every pixel of the watermarking image is compared with that of the corresponding MSB （Most Significant Bit） of the main image. When the compared value is true,the location of the main image is marked by a zero matrix, and the marked zero matrix is a key that can be used to detect the watermarking image later. Good performance can be achieved due to the watermarking information which is relatively in the most high bit-plane and is scattered to the whole of a main image. The experimental resuits show the validity of the method.

关 键 词：零水印 最高有效位 鲁棒性 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]