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基于极化合成孔径雷达数据的桥梁检测 被引量:11

Highway bridge detection based on polarimetric SAR data
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摘要 为了对遥感合成孔径雷达(SAR)图像中桥梁目标进行自动检测,在极化散射矩阵参数的基础上,提出了一种寻找河流地区对比参数的方法:将总功率、极化熵、相似性参数等参数进行加权组合,利用特征值分析方法求取最优加权系数,从而得到对河流特征敏感的参数组合表达式。进而利用该表达式对河流地区进行了分类实验,对分类结果应用图形形态学方法处理后形成水域模板。在此基础上将水域模板对敏感参数图像覆盖后,对河上桥梁目标进行了自动检测。采用PI-SAR型的雷达的全极化数据进行实验,获得了良好的检测效果,和只使用功率数据进行桥梁检测相比,原来检测不出来的桥梁目标都明显显现出来。实验结果表明,综合利用全极化SAR信息在遥感应用中可以更好的检测和识别目标。 A highway bridge detection method was developed for synthetic aperture radar (SAR) remote sensing data based on baekscattering polarimetric parameters such as span, entropy, and similarity. The optimal coefficients for a linear combination equation describing the bridge detection were obtained by solving the eigenvalue problem for the system. The river area is classified using a morphological method to build a template of the river geometry to automatically detect the bridges across the river. The system worked effectively with PI-SAR polarimetric data to efficiently recognize bridges.
出处 《清华大学学报(自然科学版)》 EI CAS CSCD 北大核心 2005年第7期888-891,共4页 Journal of Tsinghua University(Science and Technology)
基金 国家自然科学基金资助项目(40271077)
关键词 微波遥感 极化 桥梁检测 synthetic aperture radar (SAR) remote sensing polarimetry bridge detection
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参考文献6

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