| 基于DWT-CT的遥感影像数字水印方案 |
| |
| 引用本文： | 李丽丽,孙劲光.基于DWT-CT的遥感影像数字水印方案[J].世界科技研究与发展,2011(6):1033-1034. |
| |
| 作者姓名： | 李丽丽 孙劲光 |
| |
| 作者单位： | [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 |
| |
| 基金项目： | 辽宁省教育厅基金（L2010158）煤炭工业协会科学技术研究计划（MTKJ2010-317）资助项目 |
| |
| 摘 要： | 提出一种基于DCT和DWT的遥感影像数字水印方案。首先对水印图像进行Arnold置乱预处理，以破坏像素之间的空间相关性，增强算法鲁棒性；鉴于小波变换良好的局部性和时频分析特性以及多分辨率分析特性，而离散余弦变换具有较好的聚能效应，算法将载体遥感影像进行DWT变换，并选取其子带图像HLl进行DCT变换；最后自适应的将数字水印嵌入所选子块的DC系数上。实验证明本文算法有效提高了水印的不可见性，对JEPG压缩、滤波和叠加噪声等攻击具有较好的鲁棒性。
|
| 关 键 词： | 数字水印 遥感影像 DCT DWT Arnold置乱 |
Watermarking Scheme for Remote Sensing Image Based on DWT and DCT |
| |
| LI Lili; SUN Jinguang.Watermarking Scheme for Remote Sensing Image Based on DWT and DCT[J].World Sci-tech R & D,2011(6):1033-1034. |
| |
| Authors: | LI Lili; SUN Jinguang |
| |
| Institution: | LI Lili; SUN Jinguang (1. School of Geomatics,Liaoning Technical University ,Fuxin 123000; 2. School of Electronic and Information Engineering, Liaoning Technical University, Huludao 125105 ) |
| |
| Abstract: | A meaningful digital watermarking scheme for remote sensing image is proposed based on DCT and DWT. Firstly, the watermark image is scrambled by Arnold transformation to eliminate pixels＇ spatial correlation and enhance the robustness. As wavelet transformation has characteristics of well-localized, time-freqnency analysis and multi-resolution analysis, discrete cosine transformation has better shaped effect. Then DWT is applied to the host remote sensing image to get its subband HL1 . And I）CT is applied to the selected subband. At last the watermark is embedded adaptively into the DC coefficients of the selected subband. Experiments have shown that the algorithm proposed has good invisibility, with well robust against JEPG compression, filtering and noise superimposed attacking. |
| |
| Keywords: | digital watermarking remote sensing image DCT DWT Arnold scrambling |
| 本文献已被 维普 等数据库收录！ |
