基于DFT和水印分割的遥感影像数字水印方案  

A Watermarking Scheme for Remote Sensing Image Based on DFT and Watermarking Segmentation

作　　者：李丽丽[1] 孙劲光[2] 

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,阜新123000 [2]辽宁工程技术大学电子与信息工程学院,葫芦岛125105

出　　处：《计算机系统应用》2011年第9期204-206,255,共4页Computer Systems & Applications

基　　金：辽宁省教育厅基金项目(L2010158);煤炭工业协会科学技术研究计划项目(MTKJ2010-317)

摘　　要：提出一种基于DFT和水印分割的遥感影像数字水印方案。算法首先对宿主遥感影像进行归一化处理,以确定不变质心,并根据不变质心选取方形区域作为水印嵌入区域;然后,产生一个伪随机序列作为数字水印信息,并将其分成两部分;最后对宿主遥感影像中所选区域进行DFT变换,并将水印分别嵌入DFT变换的幅值和相位成分中。实验证明本文算法对JEPG压缩、滤波和噪声以及旋转、缩放、平移等几何攻击均具有较好的鲁棒性。This paper proposes a digital watermarking algorithm for remote sensing image based on DFT and watermarking segmentation. At first, it normalizes the host remote sensing image and determines an invariant centroid, then selects a square area around the invariant centroid for watermark embedding. Next, it generates a pseudo-random sequence as digital watermarking, and divides it into two parts. And finally it applies DFT to the selected region and embeds watermark into DFT phase and amplitude components of the selected square area of the host remote sensing image. Experiments have shown the algorithm＇s good robustness against JPEG compression, filtering, noise attacking, and it is also robust against geometric attacks as rotation, scaling, moving etc.

关 键 词：数字水印 遥感影像 图像归一化 DFT 不变质心 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构] TP751[自动化与计算机技术—计算机科学与技术]