共享内存环境下的并行质量引导相位解缠

发布时间：2018-04-15 22:24

本文选题：相位解缠 + 质量引导　；参考：《武汉大学学报(信息科学版)》2017年01期

【摘要】：提出了一种共享内存环境下的并行质量引导相位解缠算法。首先,分析了相邻相位点质量值计算的内在关系,采用行、列数组保存中间结果消除梯度的重复计算;然后,按行进行计算任务分配,简化相邻窗口内的行、列均值计算;最后,通过OpenMP指令实现计算任务分配,完成质量图的并行计算。对于质量引导过程内在的并行性进行了分析,但受限于重复的线程启动和退出时间开销,难以体现速度优势。对合成孔径雷达干涉(synthetic aperture radar interferometry,InSAR)和干涉合成孔径声纳(interferometric synthetic aperture sonar,INSAS)干涉相位图进行解缠实验,结果表明,所提方法提高了相位解缠效率,为在实时条件下进一步提高相位解缠精度奠定了基础。
[Abstract]:A parallel quality guided phase unwrapping algorithm in shared memory environment is proposed.Firstly, the internal relation of the mass value of adjacent phase points is analyzed, and the row and column array are used to save the intermediate result to eliminate the repeated calculation of gradient, then, the calculation task is allocated according to the row, which simplifies the calculation of the row in the adjacent window and the calculation of the average value of the column.Finally, the task assignment is realized by OpenMP instruction, and the parallel computation of quality diagram is completed.The inherent parallelism of the quality boot process is analyzed, but it is difficult to reflect the speed advantage due to the repeated thread startup and exit time overhead.The phase unwrapping experiments of synthetic aperture radar interferometry (aperture radar interferometry) and interferometric synthetic aperture sonar (INSAS) are carried out. The results show that the proposed method improves the efficiency of phase unwrapping.It lays a foundation for further improving the precision of phase unwrapping under real time conditions.
【作者单位】：海军工程大学海军水声技术研究所;
【基金】：国家自然科学基金(41304015,61671461) 中国博士后科学基金(2015M582313)~~
【分类号】：TN958;TB56

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