A Local Normal-Based Region Term for Active Contours

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 1 . 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.

• Type: Conference
• Year: 2009
• Where: EMMCVPR
• Authors: Julien Mille, Laurent D. Cohen
• Keywords: EMMCVPR 2009, Global Region Features, Region-based Active Contours, flexible Local Region