發(fā)布時間：2018-04-15 22:24

  本文選題：相位解纏 + 質(zhì)量引導��； 參考：《武漢大學學報(信息科學版)》2017年01期

【摘要】：提出了一種共享內(nèi)存環(huán)境下的并行質(zhì)量引導相位解纏算法。首先,分析了相鄰相位點質(zhì)量值計算的內(nèi)在關(guān)系,采用行、列數(shù)組保存中間結(jié)果消除梯度的重復(fù)計算;然后,按行進行計算任務(wù)分配,簡化相鄰窗口內(nèi)的行、列均值計算;最后,通過OpenMP指令實現(xiàn)計算任務(wù)分配,完成質(zhì)量圖的并行計算。對于質(zhì)量引導過程內(nèi)在的并行性進行了分析,但受限于重復(fù)的線程啟動和退出時間開銷,難以體現(xiàn)速度優(yōu)勢。對合成孔徑雷達干涉(synthetic aperture radar interferometry,InSAR)和干涉合成孔徑聲納(interferometric synthetic aperture sonar,INSAS)干涉相位圖進行解纏實驗,結(jié)果表明,所提方法提高了相位解纏效率,為在實時條件下進一步提高相位解纏精度奠定了基礎(chǔ)。
[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.
【作者單位】： 海軍工程大學海軍水聲技術(shù)研究所;
【基金】：國家自然科學基金(41304015,61671461) 中國博士后科學基金(2015M582313)~~
【分類號】：TN958;TB56

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本文編號：1756073