Fast mosaicking method of InSAR-generated multi-stripe digital elevation model

1.The College of Information Technology, Shanghai Ocean University, Shanghai 201306, China;2.College of Surveying and Geo-Informatics, Tongji University, Shanghai 200092, China

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Supported by the National Key R&D Program of China (2018YFB0505400), and National Natural Science Foundation of China (41871325)

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    A large-scale rapid DEM mosaicking method was proposed. In this method, dense tie-points were extracted from the DEM overlap areas using a block matching strategy, and the systematic errors of plane and elevation were corrected through block adjustment. Thus, an entire DEM set was generated using the mosaicking strategy of first along-track followed by cross-track. A computing strategy was adopted to accelerate the processing speed to improve the efficiency of the entire mosaicking process. The experimental results showed that the CPU/GPU asynchronous parallel method proposed in this study improves the processing efficiency by more than 18 times that of a single CPU, and realises the seamless mosaicking of multi-stripe DEMs.

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HONG Zhong-Hua, SUN Peng-Fei, ZHOU Ru-Yan, TONG Xiao-Hua, FENG Yong-Jiu, LIU Shi-Jie. Fast mosaicking method of InSAR-generated multi-stripe digital elevation model[J]. Journal of Infrared and Millimeter Waves,2022,41(2):493~500

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  • Received:August 05,2021
  • Revised:March 31,2022
  • Adopted:January 06,2022
  • Online: March 31,2022
  • Published: