基于整数小波变换的栅格数字地图数字水印算法  

Watermarking Algorithm for Digital Grid Map Based on Integer Wavelet Transformation

作　　者：朱长青[1,2] 符浩军[2,3] 杨成松[2] 王奇胜[2] 

机构地区：[1]南京师范大学虚拟地理环境教育部重点实验室,南京市文苑路1号210046 [2]信息工程大学测绘学院,郑州市陇海中路66号450052 [3]西安测绘信息技术总站,西安市西影路36号710054

出　　处：《武汉大学学报（信息科学版）》2009年第5期619-621,625,共4页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2006AA12Z223);武汉大学地理信息系统教育部重点实验室开放研究基金资助项目(wd200601)

摘　　要：根据栅格数字地图亮度高、低频分量变化大、像素值为整数等特点,提出了一种基于整数小波变换的栅格数字地图水印算法。首先将栅格数字地图进行离散整数小波变换,然后分别将水印嵌入到低频分量和高频细节分量。低频分量部分依据其亮度自适应嵌入周期性扩展水印,细节分量部分根据人类视觉系统特性在感知重要系数中嵌入水印信息。实验表明,该算法对于诸如JPEG压缩、剪裁、锐化、扭曲变形等各种常见的恶意攻击具有良好的鲁棒性。We proposed a new watermarking algorithm for the digital grid map based on integer wavelets transformation. The digital grid map was decomposed by integer wavelets transformation firstly. Then the watermark was embedded into low frequency section and high frequency section respectively. The watermark was adaptively embedded into low frequency section according to the luminance, and embedded into part of high frequency section as well. Which is selected by the characteristics of human visual systems and the intrinsic relations of wavelet coefficients. The experiments show that the proposed algorithm is robust against various vicious attacks such as JPEG compression, sharpening, cutting.

关 键 词：栅格数字地图 数字水印 整数小波变换 

分 类 号：P208[天文地球—地图制图学与地理信息工程]