| 干涉SAR图像数据压缩 |
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| 作者姓名： | 张清娟 李道京 |
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| 作者单位： | 1. 中国科学院电子学研究所微波成像技术国家重点实验室, 北京 100190;
2. 中国科学院研究生院, 北京 100049 |
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| 基金项目： | 国家"973"计划(2009CB72400)资助 |
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| 摘 要： | 研究干涉SAR图像数据压缩问题,提出将干涉SAR的数据压缩转化为一个幅度图像的压缩和一个干涉相位图的压缩. 设计机上信号处理流程,给出基于DCT和DWT的2种机上数据压缩方法,并对其数据压缩性能进行分析. 针对相干斑对干涉相位影响较大的问题,在对干涉相位图进行压缩前,插入回转中值滤波. 不同信噪比下干涉SAR仿真数据和实际数据的处理结果,表明了本文方法的有效性.
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| 关 键 词： | 干涉SAR 图像数据 数据压缩 回转中值滤波 误差分析 |
| 收稿时间： | 2012-05-02 |
| 修稿时间： | 2012-05-22 |
InSAR image data compression |
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| Authors: | ZHANG Qing-Juan LI Dao-Jing |
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| Institution: | 1. National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | The compression problem of InSAR image data is investigated. A new InSAR data compression method is presented, and it consists of an amplitude image compression and an interferogram compression. We provide the signal processing flow and two data compression methods on board which are based on DCT and DWT, respectively. The compression performance of InSAR image data is analyzed. In order to reject the speckles impact on interferogram, the pivoting median filter is applied before the interferogram is compressed. The processing results of real data and simulation data under different signal-to-noise ratios show the validity of our method. |
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| Keywords: | InSAR image data data compression pivoting median filter error analysis |
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