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arXiv 0912.3522math.OCcs.NAmath.NA
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信号处理中的近端分裂方法

Proximal Splitting Methods in Signal Processing

UPMC Université Paris 06(巴黎第六大学);Laboratoire Jacques-Louis Lions – UMR CNRS 7598(雅克-路易·利翁斯实验室);Laboratoire d’Informatique Gaspard Monge, UMR CNRS 8049, Université Paris-Est(加斯帕尔·蒙日计算机实验室)

Patrick L. Combettes, Jean-Christophe Pesquet

AI总结:

本文综述了凸函数的近端算子在信号处理中的基本性质,并提出了基于这些算子的优化方法(近端分裂方法),这些方法统一并扩展了多种已知算法,应用于信号恢复与合成。

摘要:

凸函数的近端算子是投影算子到凸集上的自然推广。该工具在凸优化问题的分析和数值求解中起着核心作用,最近被引入信号处理领域,并变得越来越重要。本文回顾了与信号处理相关的近端算子的基本性质,并提出了基于这些算子的优化方法。这些近端分裂方法被证明能够在一个统一的框架中捕捉和扩展几种著名的算法。讨论了近端方法在信号恢复和合成中的应用。

英文摘要:

The proximity operator of a convex function is a natural extension of the notion of a projection operator onto a convex set. This tool, which plays a central role in the analysis and the numerical solution of convex optimization problems, has recently been introduced in the arena of signal processing, where it has become increasingly important. In this paper, we review the basic properties of proximity operators which are relevant to signal processing and present optimization methods based on these operators. These proximal splitting methods are shown to capture and extend several well-known algorithms in a unifying framework. Applications of proximal methods in signal recovery and synthesis are discussed.

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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