天绘二号卫星双基SAR模式下海岸线提取研究  

Study on Coastline Extraction from TH-2 Satellite Bistatic SAR Data

作　　者：王赛 楼良盛 陈刚[1,2] 张笑微 WANG Sai;LOU Liangsheng;CHEN Gang;ZHANG Xiaowei(State Key Laboratory of Geo-information Engineering,Xi'an 710054,China;Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China)

机构地区：[1]地理信息工程国家重点实验室,陕西西安710054 [2]西安测绘研究所,陕西西安710054

出　　处：《测绘与空间地理信息》2024年第9期40-43,共4页Geomatics & Spatial Information Technology

基　　金：地理信息工程国家重点实验室基金项目(SKLGIE2021-ZZ-2)资助。

摘　　要：海岸线的长度及位置是国家海洋管理重要的基础数据,具有重要的开发和利用价值。本文以天绘二号卫星双基SAR影像为数据基础开展海岸线自动提取技术研究,针对单景SAR强度图含有斑点噪声阻碍判断水体边缘的问题,提出稳健的SAR影像滤波方法,并且联合主辅影像强度图、相干性图中水体区域数据特征进行海岸线识别,解决依赖单一判别信息不准确、不稳健的问题。利用区域生长法和数学形态学方法优化结果,获取最终海岸线提取结果。利用多幅天绘二号数据进行实验,结果表明,利用双基SAR数据本文方法可以改善海岸线提取的实际应用效果。The length and location of coastlines are important basic data for national ocean management.It has important development and utilization value.In this paper,the research on automatic coastline extraction technology is carried out using the bistatic SAR images of the TH-2 satellite.Aiming at the problem that speckle noise in the single SAR intensity image hinders the judgment of the water edge,a robust SAR image filtering method is proposed.In addition,the master and slave intensity images and the interferogram data features of the water area are combined to identify the coastline,which solves the problem of inaccurate and unstable information relying on a single determinant information.The results were optimized using the region-growing method and mathematical morphology method,and the final coastline extraction results were obtained.Experiments are carried out using multiple TH-2 data,and the results show that the method in this paper can improve the practical application effect of coastline extraction using bistatic SAR data.

关 键 词：天绘二号 SAR 海岸线 模糊聚类 

分 类 号：P228[天文地球—大地测量学与测量工程]