Computer Science – Computer Vision and Pattern Recognition
Scientific paper
2008-05-21
Computer Science
Computer Vision and Pattern Recognition
4 pages, ICASSP 2006
Scientific paper
In this paper, we focus on statistical region-based active contour models where image features (e.g. intensity) are random variables whose distribution belongs to some parametric family (e.g. exponential) rather than confining ourselves to the special Gaussian case. Using shape derivation tools, our effort focuses on constructing a general expression for the derivative of the energy (with respect to a domain) and derive the corresponding evolution speed. A general result is stated within the framework of multi-parameter exponential family. More particularly, when using Maximum Likelihood estimators, the evolution speed has a closed-form expression that depends simply on the probability density function, while complicating additive terms appear when using other estimators, e.g. moments method. Experimental results on both synthesized and real images demonstrate the applicability of our approach.
Aubert Gilles
Fadili Jalal
Jehan-Besson Stéphanie
Lecellier François
Revenu Marinette
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