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Applied Numerical Mathematics
Article . 2018 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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zbMATH Open
Article . 2018
Data sources: zbMATH Open
https://dx.doi.org/10.48550/ar...
Article . 2016
License: arXiv Non-Exclusive Distribution
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Parameter selection for HOTV regularization

Authors: Toby Sanders;

Parameter selection for HOTV regularization

Abstract

Popular methods for finding regularized solutions to inverse problems include sparsity promoting $\ell_1$ regularization techniques, one in particular which is the well known total variation (TV) regularization. More recently, several higher order (HO) methods similar to TV have been proposed, which we generally refer to as HOTV methods. In this letter, we investigate problem of the often debated selection of $λ$, the parameter used to carefully balance the interplay between data fitting and regularization terms. We theoretically argue for a scaling of the parameter that works for all orders for HOTV methods, based off of a single selection of the parameter for any one of the orders. We also provide numerical results which justify our theoretical findings.

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Keywords

Numerical Analysis, Numerical solutions of ill-posed problems in abstract spaces; regularization, Linear operators and ill-posed problems, regularization, inverse problems, Numerical solution to inverse problems in abstract spaces, Numerical Analysis (math.NA), image reconstruction, regularization, numerical result, Numerical solutions to equations with linear operators, Numerical aspects of computer graphics, image analysis, and computational geometry, parameter selection, FOS: Mathematics, higher-order total variation

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
7
Top 10%
Average
Average
Green
bronze