| 一种基于伪随机序列和DCT的遥感影像水印算法 |
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| 引用本文： | 朱长青,任娜.一种基于伪随机序列和DCT的遥感影像水印算法[J].武汉大学学报(信息科学版),2011,36(12):1427-1429,1499. |
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| 作者姓名： | 朱长青 任娜 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金资助项目(41071245); 国家863计划资助项目(2009AA12Z228) |
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| 摘 要： | 首先,对原始影像进行分块,通过伪随机序列选择要嵌入的影像块;然后,采用量化的方法在每一块的DCT低频系数中嵌入水印信息;最后,通过精度约束,对嵌入水印信息后的遥感影像进行误差控制。由于采用了量化的方法嵌入水印信息,其提取过程不需要原始影像的参与,实现了盲检测。实验结果表明,该算法在满足水印算法鲁棒性的同时,也能达到对遥感影像近乎零修改的目标。
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| 关 键 词： | 伪随机序列 DCT 遥感影像 水印 |
An Algorithm for Digital Watermark Based on Pseudo-Random Sequence and DCT for Remote Sensing Image |
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| ZHU Changqing REN Na.An Algorithm for Digital Watermark Based on Pseudo-Random Sequence and DCT for Remote Sensing Image[J].Geomatics and Information Science of Wuhan University,2011,36(12):1427-1429,1499. |
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| Authors: | ZHU Changqing REN Na |
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| Institution: | ZHU Changqing1 REN Na1(1 Key Laboratory of Virtual Geographic Environment of Ministry of Education,Nanjing Normal University,1 Wenyuan Road,Nanjing 210046,China) |
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| Abstract: | According to the basic requirements of digital watermark for remote sensing image,an algorithm for digital watermark based on pseudo-random sequence and DCT for remote sensing image was proposed.Firstly,the original image was segmented,and the image blocks were selected by the pseudo-random sequence.Then,the low frequency coefficients after DCT were got,and the watermark information was embedded in the low frequency coefficients of each image block using the quantitative method.Finally,the errors of embedde... |
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| Keywords: | pseudo-random sequence DCT remote sensing image watermark |
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