Subspace Correction Methods for a Class of Nonsmooth and Nonadditive Convex Variational Problems with Mixed Data-Fidelity in Image Processing

M Hintermüller, A Langer - SIAM Journal on Imaging Sciences, 2013 - SIAM
The minimization of a functional composed of a nonsmooth and nonadditive regularization
term and a combined L^1 and L^2 data-fidelity term is proposed. It is shown analytically and …

Automated parameter selection for total variation minimization in image restoration

A Langer - Journal of Mathematical Imaging and Vision, 2017 - Springer
Algorithms for automatically selecting a scalar or locally varying regularization parameter for
total variation models with an L^ τ L τ-data fidelity term, τ ∈ {1, 2\} τ∈ 1, 2, are presented …

Convergence rate of overlapping domain decomposition methods for the Rudin--Osher--Fatemi model based on a dual formulation

H Chang, XC Tai, LL Wang, D Yang - SIAM Journal on Imaging Sciences, 2015 - SIAM
This paper is concerned with overlapping domain decomposition methods (DDMs), based
on successive subspace correction (SSC) and parallel subspace correction (PSC), for the …

Recent advances in domain decomposition methods for total variation minimization

CO Lee, J Park - Journal of the Korean Society for Industrial and Applied …, 2020 - dbpia.co.kr
Total variation minimization is standard in mathematical imaging and there have been
numerous researches over the last decades. In order to process large-scale images in real …

Non-overlapping domain decomposition methods for dual total variation based image denoising

M Hintermüller, A Langer - Journal of Scientific Computing, 2015 - Springer
In this paper non-overlapping domain decomposition methods for the pre-dual total variation
minimization problem are introduced. Both parallel and sequential approaches are …

Domain decomposition methods for nonlocal total variation image restoration

H Chang, X Zhang, XC Tai, D Yang - Journal of Scientific Computing, 2014 - Springer
Nonlocal total variation (TV) regularization (Gilboa and Osher in Multiscale Model Simulat 7
(3): 1005–1028, 2008; Zhou and Schölkopf in Pattern recognition, proceedings of the 27th …

Overlapping domain decomposition methods for total variation denoising

A Langer, F Gaspoz - SIAM Journal on Numerical Analysis, 2019 - SIAM
Alternating and parallel overlapping domain decomposition methods for the minimization of
the total variation are presented. Their derivation is based on the predual formulation of the …

Fast nonoverlapping block Jacobi method for the dual Rudin--Osher--Fatemi model

CO Lee, J Park - SIAM Journal on Imaging Sciences, 2019 - SIAM
We consider nonoverlapping domain decomposition methods for the Rudin--Osher--Fatemi
(ROF) model, which is one of the standard models in mathematical image processing. The …

[PDF][PDF] Subspace methods for nonlinear optimization

X Liu, Z Wen, YX Yuan - CSIAM Trans. Appl. Math., 2021 - global-sci.com
Subspace techniques such as Krylov subspace methods have been well known and
extensively used in numerical linear algebra. They are also ubiquitous and becoming …

Fast Non-overlapping Domain Decomposition Methods for Continuous Multi-phase Labeling Problem

Z Zhang, H Chang, Y Duan - Journal of Scientific Computing, 2023 - Springer
This paper presents the domain decomposition methods (DDMs) for achieving fast parallel
computing on multi-core computers when dealing with the multi-phase labeling problem. To …