基于DLT算法的微型无人机(MUAV)视频影像的几何纠正方法  

GEOMATRIC RECTIFICATION FOR VIDEO IMAGE FROM MUAV BASED ON DLT

作　　者：李朝奎[1] 周国清 

机构地区：[1]湖南科技大学地球空间信息科学研究所 [2]Department of Engineering and Tech-nology Old Dominion University Norfolk Virgina 23529USA

出　　处：《国土资源遥感》2006年第4期23-28,I0002,共7页Remote Sensing for Land & Resources

基　　金：地理空间信息工程国家测绘局重点实验室基金(1469990424233);美国国家自然科学基金(0131893)资助

摘　　要：高精度真正射影像在灾害监测、紧急救援与反恐决策等应用领域有着广泛的应用前景。利用微型低空无人飞机获取高精度的视频影像流,对影像流进行重采样,借助直接线性变换(DLT)方法,以GPS、INS集成系统获取的摄像机外方位元素为初始值进行内方位元素解算,以此进行视频影像分割后单幅影像的几何纠正,给出了纠正影像的拼接结果。研究表明,在DEM/DSM、DOQQ的精度与视频影像精度匹配条件下,可获得高精度(亚米级)的真正射影像。In recent years, the Unmanned Aerial Vehicles （UAVs） have aroused increasing interests among experts for such civilian applications as disaster monitoring, surveillance and spatial decision - making support. The highresolution orthoimage generated from the UAVs video image stream can be used as a basic map for planners and decision -makers to make decisions by obtaining high precision geospatial data through registering, compiling, measuring and analyzing the orthoimage. This paper presents the methods for producing the true orthoimage from UAVs streams. The IOPs are calculated by using iteration algorithm having the EOPs obtained from GPS and INS system as initial values, and these parameters are used for rectification of UAVs image. Experimental results show that all the orthoimages are of high accuracy under the condition that DEM/DSM, DOQQ and UAVs video image have the same resolution.

关 键 词：MUAV 视频影像流 几何纠正 DLT算法 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置] P208[自动化与计算机技术—控制科学与工程]