Edge location in SAR images: performance of the likelihood ratio filter and accuracy improvement with an active contour approach

Author

Germain, Olivier ; Réfrégier, Philippe

Author_Institution

Lab. Signal et Image, Ecole Nat. Superieure de Phys. de Marseille, France

Volume

10

Issue

1

fYear

2001

fDate

1/1/2001 12:00:00 AM

Firstpage

72

Lastpage

78

Abstract

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

Keywords

digital filters; edge detection; image segmentation; radar imaging; synthetic aperture radar; SAR images; accuracy improvement; active contour approach; biased location; edge location; likelihood ratio edge detector; likelihood ratio filter; orientation; phenomenological model; segmentation; statistical active contour; synthetic aperture radar images; window; Active contours; Detectors; Filters; Image edge detection; Image segmentation; Layout; Optical sensors; Radar applications; Radar detection; Synthetic aperture radar;

fLanguage

English

Journal_Title

Image Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7149

Type

jour

DOI

10.1109/83.892444

Filename

892444