| 极化SAR图像中非平稳目标的检测与区分方法研究 |
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| 引用本文： | 王海江,皮亦鸣.极化SAR图像中非平稳目标的检测与区分方法研究[J].测绘科学,2009,34(6). |
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| 作者姓名： | 王海江 皮亦鸣 |
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| 作者单位： | 1. 电子科技大学电子工程学院,成都,610054;成都信息工程学院电子工程系,成都,610225
2. 电子科技大学电子工程学院,成都,610054 |
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| 基金项目： | 国家自然科学基金，四川省青年科技基金会资助项目 |
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| 摘 要： | 在合成孔径雷达(SAR)极化测量中,通常认为雷达视角相对于目标是不变的。然而实际上SAR通常具有较宽的方位向波束,在孔径合成过程中,所成的全分辨率SAR图像包含多个斜视角下的目标回波。极化参数的子孔径分析可以用来对成像过程表现出非平稳散射行为的媒质进行检测。本文提出了一套基于子孔径分解和对散射矩阵及参数进行统计分析的方法,来检测两类非平稳目标。仿真结果表明,这种方法具有较好的非平稳目标检测和区分性能。
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| 关 键 词： | 极化SAR 子孔径分析 非平稳目标 极大似然比 Bragg 谐振 |
Detection and discrimination of nonstationary objects in polarimetric SAR images |
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| WANG Hai-jiang,PI Yi-ming.Detection and discrimination of nonstationary objects in polarimetric SAR images[J].Science of Surveying and Mapping,2009,34(6). |
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| Authors: | WANG Hai-jiang PI Yi-ming |
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| Institution: | WANG Hai-jiang,PI Yi-ming(School of Electronics Engineering,University of Electronic Science , Technology of China,Chengdu 610054,China,Electronic Engineering Department,Chengdu University of Information Technology,Chengdu 610225,China) |
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| Abstract: | In synthetic aperture radar(SAR) polarimetry,it is generally assumed that the sensor has a fixed orientation with respect to the objects.However,SAR sensors usually have a wide azimuth beamwidth,i.e.,during the formation of the synthetic aperture,multiple squint angles are integrated to build the full-resolution SAR image.Subaperture analysis of polarimetric parameters can be used to discriminate media showing a nonstationary behavior during SAR integration.In this paper,a method based on subaperture decomp... |
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| Keywords: | Bragg polarimetric SAR subaperture analysis nonstationary objects maximum likely-hood ratio (MLR) bragg resonance |
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