The Methods Of DEM Construction Based On Image Matching Dataset

With the development of the related technologies of measurement satellite,TheThree-Line-Array CCD data collection equipment become one of the main sensor intranslation satellite,the explaination of observed object based on CCD measurement data isan important research content in the field.This paper made research on the registration ofCCD image data and the key technology of DEM construction based on Chang’E1lunarorbiter Three-Line-Array image data,the main research content include:1Combined the development of photogrammetry and the photogrammetric approach,the imaging of the Three-Line-Array CCD carame and the mapping of Three-Line-Arrayimage is introduced synthetically.And propose the layered image matching algorithm basedon mismatch elimination strategy on the top of pyramid level and search window ofcorresponding image points determine strategy on the bottom of pyramid leve after anaylisingimage matching algorithm classification and the advantages and disadvantages of all kinds ofalgorithms comprehensively.The algorithm generate pyramid image through waveletdecomposition using the characteristic of multi-resolution analysis firstly,construct mismatchelimination strategy and search window determine strategy secondly,improve matchingefficiency by reducing matching time and searching time of the non-corresponding imagepoints,realize the image matching from low resolution to high resolution.And show that thisalgorithm has high precision and matching efficiency through simulation experiment.2Put forward the main processing flow of DEM generation based on image matchingdata,and calculated the DEM dataset based on a group of Chang’E1Three-Line-Array CCDimage according the processing flow,then eliminating the blunders,finally generate part oflunar surface DEM through moving curved surface fitting method.