Production of DSM Based on Image Located at Edge of View of Sub Meter WFV Satellite
The Wide-Field-of-View(WFV)satellite imagery is introduced to produce large-area orthophoto images under the condition of small side roll angles.Aiming at its characteristics of wide field of view,a method of combining the edge field of wide field of view and small side roll angles to make stereo pairs and produce DSM is proposed.This method analyzes the characteristics of the WFV satellite image,selects the framed image of the standard scene of the edge field of view and combines the side roll angle to construct the satellite stereo image pair,and describes the data processing technical process.The DSM result production experiment is carried out through the"Jilin1"WFV satellite images,and the texture quality comparison test of the DSM results produced by the images captured under different sun altitude angles is compared.The experimental results show that the method can realize the stereo condition with the base-height ratio greater than 0.5,and obtain high-precision DSM results,and the accuracy can meet the requirements of DSM mapping with a scale of 1∶10 000.The comparative experiments also show that the larger the sun altitude angle,the clearer the texture of DSM results.
field angleroll anglestereo pairDSM productWFV satellite imageryJilin1
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