A nonconvex model to remove multiplicative noise

  • Authors:
  • Gilles Aubert;Jean-François Aujol

  • Affiliations:
  • Laboratoire J.A. Dieudonné, UMR, CNRS;CMLA, ENS Cachan, CNRS, PRES UniverSud

  • Venue:
  • SSVM'07 Proceedings of the 1st international conference on Scale space and variational methods in computer vision
  • Year:
  • 2007

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Abstract

This paper deals with the denoising of SAR images. We draw our inspiration from the modeling of multiplicative speckle noise. By using a MAP estimator, we propose a functional whose minimizer corresponds to the denoised image we want to recover. Although the functional is not convex, we prove the existence of a minimizer. Then we study a semi-discrete version of the associated evolution problem, for which we derive existence and uniqueness results for the solution. We prove the convergence of this semi-discrete scheme. We conclude with some numerical results.