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匹配滤波在SAR目标单个散射部件检测中的应用

DOI: 10.11834/jig.20150307

Keywords: 散射部件,部件级电磁散射模型,检测,匹配滤波,3维滑动,CLEAN

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Abstract:

目的目标部分缺失是SAR(syntheticapertureradar)ATR(automatictargetrecognition)中的难点问题,实现SAR目标散射部件级别的检测可以有效解决这一问题。方法基于目标的部件级别3维电磁散射模型提出了一种基于匹配滤波的单个散射部件检测方法。该方法通过模型预测单个散射部件的图像构造匹配滤波器,并通过在模型3维参数域的调整实现了匹配滤波器在3维空间的滑动,得到最佳的部件检测位置和最大相关系数。为克服方位角估计不准的限制,采用了领域搜索寻找最佳检测结果。按照散射部件的强度由强至弱序惯检测各个散射部件。采用CLEAN算法去除部件之间的相互干扰。结果在简易坦克部件级3维电磁散射模型基础上,利用电磁仿真数据、暗室数据以及MSTAR(movingandstationarytargetacquisitionandrecognition)干扰数据进行了单个散射部件检测实验,实验结果表明,本文方法可以很好地检测出实测图像中存在的目标散射部件,并且可以检测出缺失的散射部件。结论本文提出了基于匹配滤波器的散射部件检测方法,实验证明了该方法的有效性。

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