| 基于双阈值法的地基合成孔径雷达影像永久散射体选取方法研究 |
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| 引用本文： | 夏磊凯,付五洲,黄其欢,夏晨翔.基于双阈值法的地基合成孔径雷达影像永久散射体选取方法研究[J].勘察科学技术,2016(5). |
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| 作者姓名： | 夏磊凯 付五洲 黄其欢 夏晨翔 |
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| 作者单位： | 河海大学地球科学与工程学院 南京市210098 |
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| 摘 要： | 为了有效探测地基合成孔径雷达(GB-SAR)干涉测量中的永久散射体(PS),该文利用GB-SAR影像具有高相干性特点,基于以往雷达影像PS点选取理论提出一种平均相干系数阈值与振幅离差指数阈值的“双阈值法”自动探测法,并对阈值参数进行优化,以挑选出GB-SAR影像中精确可靠的PS点.经过实验验证,证实了该方法是有效可靠的,并得到大量数据,比少量数据选取PS点更有效、可靠.
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| 关 键 词： | GB-SAR 永久散射体(PS) 双阈值法 |
Research on PS Selection Method of GB-SAR Images Based on Dual-thresholding Algorithm |
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| Abstract: | In order to detect permanent scatterers(PS) in ground-based SAR (GB-SAR) interferometry effectively,using the characteristic of high coherence of GB-SAR images and based on the previous theory of radar image PS detecting,this paper proposed a "dual-thresholding algorithm" automatic detecting method that combined with the average correlation coefficient thresholding and the amplitude dispersion index thresholding,At the same time,the paper also optimizes the thresholding parameter to get precise and reliable PS point in GB-SAR images.After experiment verification,the results show the DTA is effective and reliable.In addition,the experiment shows a large amount of data is more effective and reliable than a small amount of data to choose PS point. |
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| Keywords: | GB-SAR permanent scatterers (PS) dual-thresholding algorithm (DTA) |
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