Titre :
|
Speckle reduction and segmentation of synthetic aperture radar images
|
Auteurs :
|
D. Smith ;
UNIVERSITY OF BRISTOL GBR REMOTE SENSING UNIT
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
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1996
|
Format :
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p.2043-2057
|
Langues:
|
= Anglais
|
Catégories :
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TELEDETECTION
|
Mots-clés:
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TELEDETECTION
;
FILTRE OPTIQUE
;
RADAR
|
Résumé :
|
Two simple modifications to the established sigma filter are proposed, and demonstrated to improve both its efficiency at smoothing speckle noise and its ability to preserve fine features. A fully automatic, unsupervised segmentation algorithm, based on the iterative application of the new filter, is described and successfully applied to ERS-1 synthetic aperture radar (SAR) images of sea ice. The simplicity of this segmentation approach, together with its ability to segment classes separated by a gradual change in grey level intensity, may offer significant advantages over techniques based on edge-detection and region growing.
|
Source :
|
Int. j. remote sensing, vol. 17, n° 11
|