Using Fourier-based shape alignment to add geometric prior to snakes

Mohamed-Ali Chermi (1) , Faouzi Ghorbel (1) , Stéphane Derrode (2)

1 CRISTAL - Centre de Recherche Réseau Image SysTème Architecture et MuLtimédia
2 FRESNEL - Institut FRESNEL

In this paper, we present a new algorithm of snakes with geometric prior. A method of shape alignment using Fourier coefficients is introduced to estimate the Euclidean transformation between the evolving snake and a template of the searched object. This allows the definition of a new field of forces making the evolving snake to have a shape similar to the template one. Furthermore, this strategy can be used to manage several possible templates by computing a shape distance to select the best one at each iteration. The new method also solves some well-known limitations of snakes such as evolution in concave boundaries, and enhances the robustness to noise and partially occluded objects. A series of experimental results is presented to illustrate performances.

Domaines: Recherche d'information [cs.IR]

Mohamed-Ali Chermi, Faouzi Ghorbel, Stéphane Derrode. Using Fourier-based shape alignment to add geometric prior to snakes. ICASSP'09, Apr 2009, Taipei, Taiwan. ⟨hal-00437091⟩