一种基于LZD的DEM漏洞修补方法  

A Method for filling voids in DEM based on LZD

作　　者：巩丹超[1,2] 黄艳 尹姣[3] GONG Danchao;HUANG Ya;YIN Jiao(Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China;State Key Laboratory of Geo-Information Engineering,Xi'an 710054,China;Unit 32023,Dalian 116031,China)

机构地区：[1]西安测绘研究所,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054 [3]32023部队,辽宁大连116031

出　　处：《测绘科学与工程》2019年第6期1-5,共5页Geomatics Science and Engineering

摘　　要：利用天绘一号立体卫星影像进行匹配生成DEM时,经常由于云的影响使得生成的DEM中存在漏洞,这种漏洞严重影响了DEM的实际应用效果。针对DEM漏洞的修补,设计提出了一种基于LZD的DEM漏洞修补方法,并利用实际的天绘一号卫星影像数据进行了试验。试验结果表明,该方法能够通过配准消除已有DEM数据和待修补DEM之间的系统误差,实现两种不同来源或者不同规格DEM数据的无缝融合,从而实现了对漏洞区域的精细修补;在保证产品精度的同时,确保了DEM成果的完整性。Due to the influence of clouds,there are always voids in the DEM generated from the stereo imagery of Tianhui-1 satellite,which seriously affect the applications of DEM.To fill these voids,a method based on LZD is proposed in this paper,and an experiment was carried out using the real stereo imagery of Tianhui-1 satellite.The experimental results show that this method can eliminate the systematic errors between the existing DEM data and the DEM to be repaired through registration,and seamlessly fuse two different sources or types of DEM data.Besides,the product accuracy and the integrity of DEM results are ensured at the same time.

关 键 词：DEM 漏洞修补 LZD ICP SRTM 

分 类 号：P237[天文地球—摄影测量与遥感]