Estimation of the Initial Image's Contributions to the Iterative Landweber Reconstruction.
Estimation of the Initial Image's Contributions to the Iterative Landweber Reconstruction.
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DOI：
10.1109/trpms.2017.2774834
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发表时间：
2018-01
影响因子：
4.4
通讯作者：
Zeng GL
中科院分区：
文献类型：
--
作者：
Zeng GL
本文提出了一种闭合形式的频域传递函数来预测在给定迭代次数的迭代Landweber重建中初始图像的贡献。传递函数表明，当迭代算法在收敛前停止时，初始图像的高频分量起着重要作用。如果成像矩阵具有满秩数，则初始图像的贡献随着迭代次数的增加而减小。
This paper develops a closed-form frequency-domain transfer function to predict the initial image’s contributions in an iterative Landweber reconstruction for a given number of iterations. The transfer function shows that the initial image’s high frequency components play an important role when the iterative algorithm is stopped before convergence. The contributions from the initial image diminish as the iteration number increases if the imaging matrix has full rank.