基于小波变换的数字地图水印算法研究  

A Digital Map Watermarking Algorithm Based on Discrete Wavelet Transform

作　　者：马武刚[1] 

机构地区：[1]河南工业大学信息科学与工程学院,河南郑州450001

出　　处：《电脑与信息技术》2007年第4期43-45,共3页Computer and Information Technology

基　　金：河南省自然科学基金项目资助(0511011000)

摘　　要：文章对数字地图进行了一般特征分析和色彩空间分析,根据数字地图独特的着色机制和丰富的图像变化等特征,提出了一种基于小波变换的数字水印算法。该算法选择图像的蓝色通道嵌入水印,在嵌入水印时,根据小波系数的重要性分别采用不同的嵌入强度来嵌入水印,从而提高了水印的不可见性和鲁棒性。实验结果表明,该算法对JPEG压缩、剪切、旋转、加噪等具有较好的鲁棒性。The paper has carried on the general characteristic analysis and the color space analysis to the digital map, according to digital map unique coloration machine-made and characteristic and so on rich picture change,proposed one kind based on the wavelet transformation digital watermark algorithm The algorithm choices picture blue color channel inserts the watermark,when inserts the watermark separately uses the different embedrnent strength according to the wavelet coefficient importance to insert the watermark,thus enhances the watermark invisibility and robustness.The experimental result indicated,this algorithm to the JPEG compression,cuts,revolves,adds chirp and soon to have a better robustness.

关 键 词：数字水印 小波变换 数字地图 版权保护 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]