摘要
以青南高原三江源试验区为例,采用SPOT-5 HRS立体影像和HRS/HRG三立体像对生成试验区1∶5万25 m间隔DEM,并利用大量外业和内业检查点对自动提取的DEM进行精度分析。试验结果表明,利用所提出的影像匹配方法可以从SPOT-5卫星影像中全自动生成1∶5万DEM。另外,SPOT-5 HRS/HRG三影像立体条带数据适用于地势起伏较大的深切割山地区域。采用此方法,可以同时保持自动生成的DEM的精度和可靠性,大大减少自动生成的DEM中存在的粗差和人工后处理的工作量。
An advanced matching approach for automatic digital elevation model（DEM） generation from high-resolution satellite images is presented. The DEMs are generated by combination of matching results of feature points, grid points and edges. The new method is applied to SPOT-5 HRS/HRG images over a testfield in Zone of Headstream of Three Rivers, Tibet Plateau, China with variable terrain geomorphologic type. The RMS errors for the whole area are 2-6 m, while for flat/hilly areas the accuracy is about 2-3 m or even better. It is shown that with the proposed automatic DEM generation approach, by using SPOT-5 HRS/HRG imagery, 1 ： 50 000 DEMs can be completed with better accuracy .
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2008年第9期943-946,989,共5页
Geomatics and Information Science of Wuhan University
基金
国家西部1:5万地形图空白区测图工程资助项目(F2543)
关键词
高分辨率卫星影像
匹配基元
几何约束的多基线影像匹配
DEM
high-resolution satellite imagery
matching primitive
geometrical constrained multiple-baseline image matching
DEM
