| 基于SAR相干系数图像的城市边界提取 |
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| 引用本文： | 张舞燕,;刘清臣,;孟秀军.基于SAR相干系数图像的城市边界提取[J].测绘与空间地理信息,2014(5):56-59. |
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| 作者姓名： | 张舞燕 ;刘清臣 ;孟秀军 |
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| 作者单位： | [1]河南理工大学矿山空间信息国家测绘地理信息局重点实验室,河南焦作454000; [2]中国地震局地质研究所地震动力学国家重点实验室,北京100029 |
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| 基金项目： | 河南理工大学研究生创新基金项目（2011-M-04）资助; 国家重点基础研究发展973计划：节能减排和新能源探索基础研究——煤矿区地质灾害与环境信息协同处理及预警基础研究（2009CB226107-1） |
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| 摘 要： | 相干系数图像对SAR散射体特性的变化十分敏感,对于城区表面特殊物理结构的探测、城市演化和灾害评估等有研究价值。采用豫北地区时间基线为70 d的ENVISAT ASAR雷达干涉相干系数图像,通过分析相干系数图像遥感物理特征,采用二值化、滤波去噪、连接外边界、区域填充、人工干预去噪、边界修整等一系列图像处理方法,最终用MATLAB软件的边界提取函数和算子提取出豫北地区8个县市的最外边界。经过与光学影像分类结果对比,吻合度较好。
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| 关 键 词： | 合成孔径雷达干涉测量 干涉相干系数图像 城市边界 永久散射体 |
City Boundary Extraction Based on Interferometric Coherent Image |
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| Institution: | ZHANG Wu -yan , LIU Qing - chen, MENG Xiu -jun (1. Key Laboratory of Mine Spatial Information Technologies of SBSM (State Bureau of Surveying ＆ Mapping), Henan Polytechnic University, Jiaozuo 454000, China; 2. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China) |
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| Abstract: | Coherence image,with sensitive to SAR scatter changes,can be used for the detection of the special physical structure of the city surface,urban evolution and disaster assessment,and it has a unique research value. This paper is based on radar interferometry coherence images with 70 d time-baseline. By analyzing the remote sensing physical characteristics of coherence images,to judge the feasibility of extracting urban boundary,by means of binarization,filtering de-noising,connecting outer boundary,filling area,de-noising with manual intervention,trimming border et al. Finally using boundary extraction functions of MATLAB,8 built city boundary were extracted successfully. Compassion with optical image it has higher goodness of fit. |
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| Keywords: | SAR interferometry（InSAR） interferometric coherence image city boundary permanent caterers |
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