UAVRS影像空中三角测量实验研究

无人飞行器低空遥感系统(UAV Low Altitude Remote Sensing System简称UAVRS系统)适合于在阴云山区低空获取高分辨率垂直和倾斜影像,但获取的影像存在像幅小、数量多、基线短、重叠度不规则且倾角过大等问题,而这些问题,都是国内外现有的数字摄影测量系统面临的新问题。本文提出以带权观测值光束法平差解决UAVRS复杂影像区域网的空中三角测量问题的方法。其技术要点在于,从提高单模型定向的精度出发,以单模型定向元素为基础构建自由区域网,为带权观测值光束法平差提供有效初值。经试验表明,空三加密点的平面精度为0.386m,高程精度为0.525m,基本能达到1∶2000地形图测图的要求。

A Reseach on aerotriangulation in UAVRS Image

Unmanned Aerial Vehicle Low Altitude Remote Sensing System(simply as UAVRS System)is suitable to acquire high image of uprightness and incline on low altitude of a mountainous area.But images are small format, excessive quantities,short,over tilt angle and irregular overlap etc. These are also new problem of the Digital Photogrammetric System that both national and international are facing.This paper provided to resolve the problem of Aerotriangulation in UAVRS image by bundle adjustment with weights observation data. We get valid initial values for bundle adjustment with weights observation data by making block on single model orientation and from improving the accuracy of single model orientation elements. The experiment results have verified that plan accuracy of aerotriangulation is 0.386m and Elevation accuracy is 0.525m. Its accuracy is achieved the need of mapping for 1:2000 DLG.basically.