Edge location in SAR images: performance of the likelihood ratio filter and accuracy improvement with an active contour approach.
The likelihood ratio edge detector is an efficient filter for the segmentation of synthetic aperture radar (SAR) images. We show that this filter provides biased location of the edge, when the window does not have the same orientation as the edge. A phenomenological model is proposed to characterize this bias. We then introduce an efficient technique to refine edge location: the statistical active contour. The combination of these two methods permits to achieve accurate and regularized edge location.
Germain
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Laboratoire Signal et Image, Ecole Nationale Supérieure de Physique de Marseille, 13 397 Marseille cedex 20, France.
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