高分辨率遥感影像自动生成DEM的研究

以三江源测区为研究对象,采用传统法和影像自动匹配法进行DEM制作。通过试验研究及对比分析发现:两种方法制作的DEM均能满足精度要求,传统法精度高,过程流畅,工艺纯熟,不足之处是工期较长;影像自动匹配法制作的DEM精度虽不及传统法高,但其工期短,工效是传统法的5倍左右。考虑到在满足精度要求的前提下,作为提高作业效率的一种方法,影像自动匹配法大规模制作DEM可应用于实际生产。

Research on Auto-Generation of DEM by Using High-Resolution Remote Sensing Images

This paper adopts “Traditional Method” and “Image Auto-Matching Method” to produce DEM , taking Shan -Jiang-Yuan as the object of study .The results were as follows:both methods can meets accuracy requirements , comparing with“Image Auto-Matching Method”,“Traditional Method” is high precision, more smoother, more skillful, and longer period in DEM production;Though “Image Auto-Matching Method” precision is not as high but its efficiency is five -times compared with “Traditional Meth-od”.Considering the precondition that accuracy satisfying the request , as a way to improve work efficiency in large -scale production of the DEM,“Image Auto-Matching Method” can be applied to actual production .