一种基于混沌序列的DCT数字图像水印算法的研究  

Research of Digital Watermarking Algorithm Based on DCT and Chaotic Sequences

作　　者：张小松[1] 郭琳虹[1] 刘玉民[2] 

机构地区：[1]唐山学院计算机科学与技术系,河北唐山063000 [2]唐山学院信息工程系,河北唐山063000

出　　处：《唐山学院学报》2009年第6期61-64,96,共5页Journal of Tangshan University

基　　金：唐山市科学技术研究与发展指导计划项目(09110213a)

摘　　要：提出了一种基于混沌序列的DCT数字图像水印嵌入算法,利用Logistic混沌映射来置乱水印以提高数字水印的随机性,并对水印图像作调制加密处理以消除水印图像各像素的空间相关性,而且嵌入水印的DCT块并不连续地选取,而是用Logistic混沌序列选取。实验结果表明,该算法在抵抗噪声、JPEG有损压缩以及裁剪等方面均有较好的鲁棒性。A digital watermarking algorithm based on DCT and chaotic sequences is presented in this paper,where the watermark is permuted by Logistic Mappping for randomicity and encrypted for eliminating the space relativity,and the DCT block of watermark is not selected successively,but with Logistic Mapping.Experimental results show that the algorithm presents better robustness against noise,JPEG compress and crop etc.

关 键 词：DCT 数字水印 混沌序列 LOGISTIC映射 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]