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    基于动态分界点计算的并行几何校正算法

    A Parallel Geometric Correction Algorithm Based on Dynamic Division-Point Computing

    • 摘要: 近年来,遥感图像几何校正的并行处理成为重点研究的对象.但现有的并行算法尚存在一些问题,这些算法不具备负载平衡能力或者全局计算量大,而且局部操作非常耗时.针对以上不足提出了一种基于动态分界点计算的并行几何校正算法PIWA-DDC. 通过LogP模型,推导出PIWA-DDC算法具有良好的可扩展性.通过在MPP上的测试数据,验证了该算法具有良好的负载平衡能力和高效处理几何畸变的能力.

       

      Abstract: Recently, parallelization of geometry correction on remote-sensing image has become an important research area. But there exist some problems in current parallel algorithms: They do not have the capability of load-balance, or the global computation is very large. What's more, local operation is time-consuming. Therefore, a parallel geometry correction algorithm based on dynamic division-point computing, called PIWA-DDC, is proposed. By means of the LogP model, it is deduced that PIWA-DDC has good scalability. The results from experiments on MPP show that this algorithm has good capability of load-balance and high efficiency of geometry aberration processing.

       

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