Fast mosaicking method of InSAR-generated multi-stripe digital elevation model
Fast mosaicking method of InSAR-generated multi-stripe digital elevation model
复制标题
InSAR生成多条纹数字高程模型的快速镶嵌方法
DOI：
10.11972/j.issn.1001-9014.2022.02.016
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发表时间：
2022
影响因子：
0.7
通讯作者：
Liu Shijie
中科院分区：
文献类型：
--
作者：
Hong Zhonghua;Sun Pengfei;Zhou Ruyan;Tong Xiaohua;Feng Yongjiu;Liu Shijie
提出了一种大规模快速DEM镶嵌方法。该方法利用块匹配策略从DEM重叠区提取密集结点，并通过块平差修正平面和高程的系统误差。因此，采用先沿轨道后跨轨道的镶嵌策略生成完整的DEM集。采用计算策略加快处理速度，提高了整个拼接过程的效率。实验结果表明，本文提出的CPU/GPU异步并行方法的处理效率是单CPU的18倍以上，实现了多条DEM的无缝拼接。
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.