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基于体散射约束的极化SAR相干变化检测方法

冀广宇 梁兴东 董勇伟 李焱磊

冀广宇, 梁兴东, 董勇伟, 李焱磊. 基于体散射约束的极化SAR相干变化检测方法[J]. 电子与信息学报, 2018, 40(10): 2461-2469. doi: 10.11999/JEIT180035
引用本文: 冀广宇, 梁兴东, 董勇伟, 李焱磊. 基于体散射约束的极化SAR相干变化检测方法[J]. 电子与信息学报, 2018, 40(10): 2461-2469. doi: 10.11999/JEIT180035
Guangyu JI, Xingdong LIANG, Yongwei DONG, Yanlei LI. Polarimetric SAR Coherent Change Detection Method Based on Volume Scattering Constraint[J]. Journal of Electronics & Information Technology, 2018, 40(10): 2461-2469. doi: 10.11999/JEIT180035
Citation: Guangyu JI, Xingdong LIANG, Yongwei DONG, Yanlei LI. Polarimetric SAR Coherent Change Detection Method Based on Volume Scattering Constraint[J]. Journal of Electronics & Information Technology, 2018, 40(10): 2461-2469. doi: 10.11999/JEIT180035

基于体散射约束的极化SAR相干变化检测方法

doi: 10.11999/JEIT180035
详细信息
    作者简介:

    冀广宇:男,1988年生,博士生,研究方向为机载合成孔径雷达信号处理

    梁兴东:男,1973年生,研究员,博士生导师,研究方向为阵列干涉SAR系统技术、微波光子成像雷达系统技术、片上雷达微系统技术

    董勇伟:男,1982年生,副研究员,硕士生导师,研究方向为高分辨率小型化合成孔径雷达系统技术、雷达低慢小目标探测技术

    李焱磊:男,1983年生,副研究员,硕士生导师,研究方向为穿墙雷达成像技术

    通讯作者:

    董勇伟  ywdong@mail.ie.ac.cn

  • 中图分类号: TP751.1

Polarimetric SAR Coherent Change Detection Method Based on Volume Scattering Constraint

  • 摘要: 相干变化检测(CCD)利用场景中变化区域的失相干特性进行检测,而场景中存在的体散射植被区域及低信噪比区域也呈现低相干特性,对待检测变化区域形成干扰。该文提出一种极化SAR CCD方法,首先利用变化前后SAR图像间的极化相干信息建立加权迹相干统计量,然后利用各个SAR图像内极化通道间的相干信息,通过建立混合GEV分布模型,采用改进EM算法求解各分量参数,建立体散射约束项,最后结合散射功率变化约束项构建极化CCD检验统计量。该方法可在不影响检测性能情况下排除干扰。该文采用变化前后的两幅L波段全极化SAR图像进行方法验证,实验结果及指标参数验证了该方法的正确性与有效性。
  • 图  1  极化CCD方法流程图

    图  2  极化CCD统计量

    图  3  场景示意图

    图  4  加权迹相干变化差异图(在0~1范围内取值)

    图  5  直方图与拟合分布模型对比结果

    图  6  约束项

    图  7  极化CCD相干变化差异图(根据统计量性质,各图均在0~1范围内取值)

    图  8  各极化CCD方法指标分析结果

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出版历程
  • 收稿日期:  2018-01-10
  • 修回日期:  2018-05-02
  • 网络出版日期:  2018-07-30
  • 刊出日期:  2018-10-01

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