arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.12834math.OCcs.NAmath.NA
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全广义变分的一种有效的增广拉格朗日方法及其半光滑牛顿解

An Efficient Augmented Lagrangian Method with Semismooth Newton Solver for Total Generalized Variation

Hongpeng Sun

摘要:

总广义变分(TGV)是一种非常强大和重要的正则化方法,用于各种反问题和计算机视觉任务。在本文中,我们提出了一个半光滑牛顿基增广拉格朗日方法来解决这个问题。增广拉格朗日方法(又称乘子法)被广泛应用于许多光滑或非光滑的变分问题。然而,其效率通常严重依赖于同时解决耦合和非线性系统,这是非常复杂的和高度耦合的总广义变化。利用有效的原始-对偶半光滑Newton方法求解包含广义变分的复杂线性子问题,研究了一种高效的半光滑Newton算法,并与一阶方法进行了比较.通过分析相应函数的度量子空间,给出了增广拉格朗日方法的整体收敛和局部线性收敛速率.

英文摘要:

Total generalization variation (TGV) is a very powerful and important regularization for various inverse problems and computer vision tasks. In this paper, we proposed a semismooth Newton based augmented Lagrangian method to solve this problem. The augmented Lagrangian method (also called as method of multipliers) is widely used for lots of smooth or nonsmooth variational problems. However, its efficiency usually heavily depends on solving the coupled and nonlinear system together and simultaneously, which is very complicated and highly coupled for total generalization variation. With efficient primal-dual semismooth Newton methods for the complicated linear subproblems involving total generalized variation, we investigated a highly efficient and competitive algorithm compared to some efficient first-order method. With the analysis of the metric subregularities of the corresponding functions, we give both the global convergence and local linear convergence rate for the proposed augmented Lagrangian methods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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