A Local Normal-Based Region Term for Active Contours

Authors:
Julien Mille;Laurent D. Cohen
Affiliations:
CEREMADE, CNRS UMR 7534, Université Paris Dauphine, Paris, France 75775;CEREMADE, CNRS UMR 7534, Université Paris Dauphine, Paris, France 75775
Venue:
EMMCVPR '09 Proceedings of the 7th International Conference on Energy Minimization Methods in Computer Vision and Pattern Recognition
Year:
2009

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Abstract

Global region-based active contours, like the Chan-Vese model, often make strong assumptions on the intensity distributions of the searched object and background, preventing their use in natural images. We introduce a more flexible local region energy achieving a trade-off between local features of gradient-like terms and global region features. Relying on the theory of parallel curves, we define our region term using constant length lines normal to the contour. Mathematical derivations are performed on an explicit curve, leading to a form allowing efficient implementation on a parametric snake. However, we provide implementations on both explicit and implicit contours.