A convergent overlapping domain decomposition method for total variation minimization

Massimo Fornasier, Andreas Langer, Carola-Bibiane Schönlieb

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

In this paper we are concerned with the analysis of convergent sequential and parallel overlapping domain decomposition methods for the minimization of functionals formed by a discrepancy term with respect to the data and a total variation constraint. To our knowledge, this is the first successful attempt of addressing such a strategy for the nonlinear, nonadditive, and nonsmooth problem of total variation minimization. We provide several numerical experiments, showing the successful application of the algorithm for the restoration of 1D signals and 2D images in interpolation/inpainting problems, respectively, and in a compressed sensing problem, for recovering piecewise constant medical-type images from partial Fourier ensembles. © 2010 Springer-Verlag.
Original languageEnglish (US)
Pages (from-to)645-685
Number of pages41
JournalNumerische Mathematik
Volume116
Issue number4
DOIs
StatePublished - Jun 22 2010
Externally publishedYes

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