摘要
在抗震救灾行动中,航空摄影测量可提供高分辨的正射影像图、精确的DEM和三维景观图等测绘产品,并能提供各种直观、精确的可视化量测工具,帮助救援队伍及时制定出有效的救援计划并进行合理的人员调度。但在应急响应中,航空摄影必须沿着主要道路、河流、桥梁等重要交通干线进行,甚至在城市上空还需进行盘旋飞行,以获取居民区更多的地面信息。因此,如何能快速、高效地对这种"非常规"海量航空摄影数据进行处理,及时生成各类测绘产品,成为抗震救灾中航空摄影测量应急响应的关键。结合中国自主研发的数字摄影测量网格(DPG rid)系统对震区海量"非常规"航空影像快速处理的流程,介绍了航空摄影测量在应急响应中的应用。
The aerial photogrammetry can provide not only high resolution ortho images,accurate Digital Elevation Models and 3D Landscape Maps,but also all kinds of accurate and visualized measuring tools for the fast response to the disaster rescue.These applications of aerial photogrammetry can help the breakdown gang design effective rescue plans and dispatch salvagers rationally shortly after the disaster.However,in the emergency response,the aerial images can not be taken according to the conventional aerial photography in the limited time.That means the airplane should fly along the main traffic lines,e.g.roads,rivers and bridges,and when the airplane fly above a county it should circle around in the air to acquire the detailed information of the county.At the same time,although there are POS(GPS/IMU)data,the precision of POS is very low,because there are neither reference stations for GPS nor ground control points for calibrating the POS system at emergency time.So for the disaster rescue,it is very important to process the mass unconventional aerial images accurately and quickly in a highly efficient way.DPGrid is a haerial photogrammetry software developed by Wuhan University.It utilizes the blade severs as the computing nodes and applies the robust digital photogrammetry arithmetic and parallel computing to realize quick processing of mass aerial data.In the China Earthquake Rescue DPGrid processed 4393 unconventional aerial photography DMC images in 111 hours and provided many timely and accurate surveying and mapping products for the rescue organization.This paper introduces the applications of aerial photogrammetry in the emergency response through discussing the method of how DPGrid processed the mass aerial images in China Earthquake Rescue.The main content includes: the architecture of DPGrid;the robust stereo image matching for the images with large rotation angle;the bundle adjustment with POS but without ground control points for removing the POS relative error;the DPGrid parallel computing for generating
出处
《遥感学报》
EI
CSCD
北大核心
2008年第6期852-857,共6页
NATIONAL REMOTE SENSING BULLETIN
基金
国家自然科学基金资助项目(编号:40771177)
国家高技术研究与发展计划(863)资助项目(编号:2006AA12Z136)
