一种DSM提取及TDOM生产的新方法

A New Framework for DSM Extraction and TDOM Production

针对目前数字表面模型(Digital Surface Model,DSM)提取及真正射影像(True Digital Orthophoto Map,TDOM)生产工艺繁琐、效率低下、精度较差的问题,以高分辨率无人机影像为实验对象,采用PhotoScan、Bingo、PCI三款软件联动处理的方式,提出了一种DSM提取和TDOM生产的新框架。通过PhotoScan快速匹配连接点,结合Bingo软件进行严密的空三解算,将Bingo空三结果导入PCI软件中,提取DSM,再利用其纠正影像,生产TDOM。实验结果显示,平面位置中误差为60 mm,高程中误差为75.7 mm;提取的DSM整体完整纯净,植被、建筑物、道路轮廓清晰完整;生产的TDOM图案纹理细节完好,色彩真实。实验证明,该框架生产效率和精度较传统生产方案均有所提高。

Taking high-resolution UAV images as the experimental object and adopting the linkage processing mode of PhotoScan,Bingo,and PCI,a new framework of DSM extraction and TDOM production is proposed to solve the problems of tedious craft,low efficiency and poor precision of the current Digital Surface Mode(DSM)extraction and True Digital Orthophoto Map(TDOM)production in this paper.First,PhotoScan is used to quickly match the connection points and in combination with Bingo software,rigorous aerial triangulation calculations is performed.Then,Bingo aerial triangulation results are imported into PCI software and DSM is extracted to correct images for producing TDOM.Experimental results show as follows:The medium error in the plane is 60mm and the medium error in the elevation is 75.7 mm;The extracted DSM is complete and pure,with clear and complete outlines of vegetation,buildings,and roads;The texture details of the produced TDOM patterns are intact and the colors are real.Experiments prove that the production efficiency and accuracy of the framework have been improved when compared with that of traditional production schemes,which is of certain reference value.