A simple primal-dual method for total variation image restoration

A simple primal-dual method for total variation image restoration
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一种简单的全变分图像恢复原对偶方法

DOI:
10.1016/j.jvcir.2016.04.025
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发表时间:
2016-07-01
影响因子:
2.6
通讯作者:
Wang, Shuo
Wang, Shuo
中科院分区:
计算机科学3区
文献类型:
--
作者:
Zhang, Benxin;Zhu, Zhibin;Wang, Shuo

文献摘要

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在这项研究中,我们提出了一个简单的原始-对偶方法的总变差最小化问题。在算法中采用了对偶变量的预估-校正格式,并证明了算法的收敛性。我们还证明了迭代格式在遍历意义下具有O(1/N)的收敛速度,其中N表示迭代次数。图像去模糊和CT重建的数值结果表明了新算法的有效性。(C)2016 Elsevier Inc. All rights reserved.
In this study we propose a simple primal-dual method for total variation minimization problems. A predictor-corrector scheme to the dual variable is used in our algorithms and convergence of the method is proved. We also show that the iterative scheme has O(1/N) convergence rate in the ergodic sense, where N denotes the iteration number. Numerical results including image deblurring and computerized tomography reconstruction demonstrate the efficient of the new algorithms. (C) 2016 Elsevier Inc. All rights reserved.