Sobolev gradients and joint variational image segmentation, denoising and deblurring

Miyoun Jung*, Ginmo Chung, Ganesh Sundaramoorthi, Luminita A. Vese, Alan L. Yuille

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We consider several variants of the active contour model without edges,4 extended here to the case of noisy and blurry images, in a multiphase and a multilayer level set approach. Thus, the models jointly perform denoising, deblurring and segmentation of images, in a variational formulation. To minimize in practice the proposed functionals, one of the most standard ways is to use gradient descent processes, in a time dependent approach. Usually, the L2 gradient descent of the functional is computed and discretized in practice, based on the L2 inner product. However, this computation often requires theoretically additional smoothness of the unknown, or stronger conditions. One way to overcome this is to use the idea of Sobolev gradients.8,13,19 We compare in several experiments the L2 and H1 gradient descents for image segmentation using curve evolution, with applications to denoising and deblurring. The Sobolev gradient descent is preferable in many situations and gives smaller computational cost.

Original languageEnglish (US)
Article number72460I
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume7246
DOIs
StatePublished - 2009
Externally publishedYes

Keywords

  • Functional minimization
  • Gradient descent
  • Image restoration
  • Image segmentation
  • Implicit representation
  • Sobolev gradients

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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