基于SAR相干系数图像的城市边界提取  

City Boundary Extraction Based on Interferometric Coherent Image

作　　者：张舞燕 刘清臣 孟秀军[1,2] 

机构地区：[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

出　　处：《测绘与空间地理信息》2014年第5期56-59,共4页Geomatics & Spatial Information Technology

基　　金：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)

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。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.

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 

分 类 号：P237[天文地球—摄影测量与遥感]