Exploiting information geometry to improve the convergence of nonparametric active contours

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10 Citations (Scopus)
318 Downloads (Pure)


This paper presents a fast converging Riemannian steepest descent method for nonparametric statistical active contour models, with application to image segmentation. Unlike other fast algorithms, the proposed method is general and can be applied to any statistical active contour model from the exponential family, which comprises most of the models considered in the literature. This is achieved by first identifying the intrinsic statistical manifold associated with this class of active contours, and then constructing a steepest descent on that manifold. A key contribution of this paper is to derive a general and tractable closed-form analytic expression for the manifold's Riemannian metric tensor, which allows computing discrete gradient flows efficiently. The proposed methodology is demonstrated empirically and compared with other state of the art approaches on several standard test images, a phantom positron-emission-tomography scan and a B-mode echography of in-vivo human dermis.

Original languageEnglish
Article number6990574
Pages (from-to)836-845
Number of pages10
JournalIEEE Transactions on Image Processing
Issue number3
Publication statusPublished - Mar 2015


  • active contours
  • information geometry
  • level sets
  • variational methods on Riemannian manifolds

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Software


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