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FRINGE '96 Workshop: ERS SAR Interferometry, 30 September - 2 October 1996
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Linear feature extraction from ERS SAR scenes using INSAR coherence maps

Olaf Hellwich Technical University Munich, Chair for Photogrammetry and Remote Sensing, 80290 Munich, Germany


A Bayesian approach to the extraction of linear features from SAR scenes is proposed. The SAR data evaluated are the intensity and the coherence from interferometric processing. Both are analysed using a rotating template. The results are combined in the likelihood function of Bayes' theorem. Prior knowledge about the continuity of thin curvilinear structures is formulated as a Markov random field. The object parameters are determined by an approximate maximum a posteriori estimate using simulated annealing or by local highest confidence first estimation.
Keywords: line extraction, Markov random fields, SAR, coherence data

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry