Time-frequency analysis of point target behaviour in high resolution single polarization SAR images
Conference: EUSAR 2008 - 7th European Conference on Synthetic Aperture Radar
06/02/2008 - 06/05/2008 at Friedrichshafen, Germany
Proceedings: EUSAR 2008
Pages: 4Language: englishTyp: PDF
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Authors:
Spigai, Marc (Thales Alenia Space, 26, avenue J.F. Champollion, BP 33787, 31037 Toulouse cedex 1,France)
Tison, Céline; Souyris, Jean-Claude (CNES, Altimetry and Radar Department, BPI 601, 18, Avenue Edouard Belin, 31401 Toulouse Cedex 9, France)
Abstract:
In high resolution Synthetic Aperture Radar (SAR) images, backscattering may vary over the integration time. Such fluctuations provide additional information on the illuminated objects. A Time-Frequency Analysis (TFA) allows tracking of such instability for instance through a spectrogram. This method is developed in this paper in order to lead to a classification scheme of different backscattering behaviours. A base of canonical targets is identified and, from their TFA behaviours, a set of parameters has been defined which allows classification of pixels on this base. Moreover, classification performances are evaluated on real high resolution images.