基于广义卫星立体像对的数字高程模型提取研究

Research on Extracting Digital Elevation Model fromGeneralized Stereoscopic Image Pair of Satellite

立足摄影测量立体成像基本原理,提出了基于高分辨率卫星遥感影像广义立体像对的数字高程模型提取,阐述了该工艺的流程和关键算法,评估分析了控制点数量对广义立体像对模型定位精度的影响,并成功基于不同传感器获取的高分辨率卫星遥感影像提取了符合1∶5000标准比例尺的数字高程模型。该方法能够降低当前数字高程模型制作所需数据源的成本,具有一定的工程化应用前景,能为数字高程模型的规模化快速获取和更新提供支撑。

A method of extracting digital elevation model in mountain are from generalized satellite stereoscopic image was proposed,which was based on the basic theory of photogrammetry,and then the workflow and key algorithm of this method was expounded,the influence of the number of control points on the positioning accuracy of the generalized stereoscopic images was evaluated and analyzed.The digital elevation model was successfully extracted from different kinds of high resolution satellite remote sensing images,which could meet the standard index of the 1∶5000 digital elevation model.This method could reduce the cost of the data sources used to make digital elevation mode,so it has a certain prospect of engineering application,and it could provide support for the acquisition and updating of the digital elevation model.