| 基于Rician分布的SAR图像MRG目标提取算法 |
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| 引用本文： | 孔莹莹,周建江,张焱.基于Rician分布的SAR图像MRG目标提取算法[J].宇航学报,2011(10). |
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| 作者姓名： | 孔莹莹 周建江 张焱 |
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| 作者单位： | 南京航空航天大学信息科学与技术学院; |
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| 基金项目： | 教育部研究生创新计划(CX08B_078Z) |
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| 摘 要： | 针对SAR图像特有的乘性噪声和非恒虚警统计特性很难正确提取目标的问题,本文提出了MRG算法对SAR目标进行检测。首先用MRF-ICM算法对SAR图像进行后向散射系数的复原,再在复原后的幅度上叠加相位信息后引入Rician分布寻找自适应的最佳局域Gabor滤波器参数对SAR图像进行目标提取。和以往的算法相比,MRG算法充分利用了SAR图像幅度和相位中所携带的信息,能更准确地提取目标。实验表明:该方法能取得很好的目标检测效果,后期提取出的目标更符合实际目标形态,具有较强的通用性。
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| 关 键 词： | SAR图像 MRG检测器 图像复原 Rician分布 目标提取 |
Rician Distribution-Based MRG Target Extract Algorithm for SAR Image |
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| KONG Ying-ying,ZHOU Jian-jiang,ZHAN Yan.Rician Distribution-Based MRG Target Extract Algorithm for SAR Image[J].Journal of Astronautics,2011(10). |
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| Authors: | KONG Ying-ying ZHOU Jian-jiang ZHAN Yan |
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| Institution: | KONG Ying-ying,ZHOU Jian-jiang,ZHAN Yan (College of Information Science and Technolog,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China) |
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| Abstract: | Due to SAR image inherent characteristics of multiplicative noise and statistical properties of non-constant false-alarm rate(CFAR),target extraction in synthetic aperture radar(SAR) images is extremely difficult.In this paper,a new target extractor for SAR images named MRG is proposed.First,the MRF-ICM model is used for recovering SAR backscattering coefficients.Second,by selecting the optimal filter parameters based on the outputs of Rician distribution,a Gabor filter is introduced to extract targets from... |
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| Keywords: | SAR image MRF-Rician-Gabor detector Image recovery Rician distribution Target extraction |
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