基于图像内容的非对称数字水印  

Asymmetric digital watermarking based on content of image

作　　者：钟绍辉[1] 王志刚[1] 

机构地区：[1]湖南师范大学数学与计算机科学学院,长沙410081

出　　处：《计算机工程与应用》2008年第14期94-95,126,共3页Computer Engineering and Applications

摘　　要：在小波变换的基础上,提出了一种基于图像内容的非对称数字水印。首先,利用SOBEL算子提取经过小波分解后的低频区域中的图像的边缘特征的系数,存储在一向量中,利用非线性函数对水印加密,并将水印嵌入图像的边缘系数中。实验结果表明该算法具有极强的鲁棒性和不可见性。在实验过程中,利用MATLAB的引擎,在VC++中实现调用MATLAB的工具箱,快捷的编写了简洁的原代码。In this paper, a new asymmetric watermarking technique is proposed based on discrete wavelet transform firstly, the SOBEL operator is utilized to extract feature point in low-frequency components through wavelet transform, secondly the watermarking is eneoded by publie-key funetions,at last,the watermarking is embedded into the feature point, The result of experiment has proved the arithmetic is robust and invisible. The MATLAB engineer and its tool box are utilized to eneode in VC＋＋,

关 键 词：小波变换 SOBEL算子提取边缘 基于图像的内容 非对称水印 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]