首页 >  2008, Vol. 12, Issue (6) : 1993-2002

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10.11834/jrs.200806118

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汶川地震灾区无人机遥感影像获取与可视化管理系统研究
中国科学院遥感应用研究所,遥感科学国家重点实验室,北京 100101
摘要:

介绍无人机遥感影像获取、纠正、配准及可视化管理的关键技术与系统研发.论文设计无人机影像获取及三维可视化管理系统的框架结构,包括航迹规划、无人机影像获取、影像预处理及三维可视化4个子系统;讨论了基于高分辨率遥感影像的无人机影像配准、无人机影像的空间索引管理、基于四叉树的影像金字塔及细节层次模型等关键技术.基于自主研发的虚拟地理环境数字地球平台(VGE-3DGJobeEanh),构建了汶川地震应急三维可视化遥感影像管理系统,在"5·12"汶川地震的救援与次生灾害应急中进行了实践应用.同时该系统可继续服务于汶川地震灾后重建的信息共享管理、发布以及空间决策支持.

Study on UAV Remote Sensing Image Acquiring and Visualization Management System for the Area Affected by 5·12 Wenchuan Earthquake
Abstract:

The aerial remote sensing(RS) by unmanned aerial vehicles(UAV),which is flexible and quick, showed great benefits in data collection for the area mi pacted by 5·12Wenchuan earthquake. A framework of 3D visualizationmanage-ment system forUAV remote sensing mi age has been developed. There are fourparts in this3D visualization system: flight tracking design system, remote sensing mi age acquiring system, mi age processing system, and 3D visualizationmanagement system. The flight tracking system provides the tools to design flightpath forUAV in a 3-D visualization environments. The flightpath design can be loaded into theUAV flightpath controlsystem to control theUAV direction, speed, and so on. The remote sensing miage acquiring system is to acquire remote sensing mi agesby controlling the attitudes and camera actions of the aerial vehicles. The mi age processing system includes the functions of mi age distortion correction and registration. The 3Dmanagement system handles themanagement and 3D visualization ofUAV miages. The key technologies regarding the system are discussed. The high-resolution remote sensing mi ages are used as base mi ages, and the geometric correction and Gray-Scale transformmethods are employed to change originalUAV remote sensing mi ages to new ones in geographic coordi-nate system. UAV remote sensing mi agesaremanaged by spatial index in 3D visualization environment which hasmulti-scale remote sensing mi ages from different satellites. The paper establishes the quadtree pyramid and LOD model formanaging large volume remote sensing data, which can providemore fluentvisualizationwhen usersnavigate in the 3D virtual environ-ment. A 3D visualization management system forUAV remote sensing mi ages has been mi plemented based on the VGE-3DGlobe Earth platform. From the expermi ental results, the system workswellwhen itmanages and visualizes the UAV re-mote sensing mi ages in the areas mi pacted by5·12Wenchuan earthquake. With regard to the roles of UAV remote sensing in the5·12Wenchuan earthquake rescue, it is argued that UAV remote sensing mi ages acquiring and visualization manage-ment system can be a very mi portantsupporting tool forquick response ofemergentevents such as floods, earthquakes, forest fires, and environmental pollution earthquakes.

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