| 基于模糊CFAR的SAR图像非均匀背景目标检测算法 |
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| 引用本文： | 徐晶,张弓.基于模糊CFAR的SAR图像非均匀背景目标检测算法[J].宇航学报,2011,32(7). |
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| 作者姓名： | 徐晶 张弓 |
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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,南京,210016 |
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| 基金项目： | 教育部留学回国人员科研启动基金 |
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| 摘 要： | CFAR是目前应用最为广泛且实时有效的SAR图像目标检测算法,在非均匀背景情况下,一般的CFAR检测都会存在大量虚警.引入模糊逻辑的概念,提出了一种非均匀背景的SAR图像模糊CFAR目标检测算法.基于Weibull分布,分别推导出模糊CA-CFAR和模糊OS-CFAR的隶属函数,并根据相应的模糊融合准则进行融合处理,得到模糊CFAR检测器的中心门限.仿真结果表明,模糊CFAR检测算法在非均匀背景的SAR图像目标检测中,具有较高的检测概率,且虚警少,具备一定的实用价值.
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| 关 键 词： | 恒虚警检测 模糊逻辑 单元平均 有序统计 模糊融合 |
A Fuzzy CFAR-Based Target Detection Algorithm for SAR Images under Non-Homogenous Background |
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| XU Jing,ZHANG Gong.A Fuzzy CFAR-Based Target Detection Algorithm for SAR Images under Non-Homogenous Background[J].Journal of Astronautics,2011,32(7). |
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| Authors: | XU Jing ZHANG Gong |
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| Institution: | XU Jing,ZHANG Gong (College of Information Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China) |
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| Abstract: | CFAR is an available and widespread used algorithm in target detection in SAR images,but it may produce a large number of false alarms under non-homogenous background.A fuzzy CFAR algorithm is proposed for target detection of SAR images under non-homogenous background.Based on Weibull distribution,the membership functions of fuzzy CA-CFAR and fuzzy OS-CFAR are obtained and combined via fuzzy fusion rules to produce a threshold of fusion centre.The simulation results show a great improvement to efficiency of... |
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| Keywords: | CFAR detection Fuzzy rules Cell average Order statistics Fuzzy data fusion |
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