Extraction de motifs spatio-temporels dans des séries d'images de télédétection : application à des données optiques et radar

Abstract : The Satellite Image Time Series (SITS), aiming the same scene in evolution, are of high interest as they capture both spatial and temporal information. The extraction of this infor- mation to help the experts interpreting the satellite data becomes a stringent necessity. In this work, we expound how to adapt frequent sequential patterns extraction to this spatiotemporal context in order to identify sets of connected pixels sharing a same temporal evolution. The original approach is based on the conjunction of support constraint with different constraints based on pixel connectivity that can filter or prune the search space in order to efficiently ob- tain Grouped Frequent Sequential (GFS) patterns that are meaningful to the end user. The proposed extraction method is unsupervised and pixel level based. To verify the generality of GFS-pattern concept and the proposed method capability to offer interesting results from SITS, real data experiments on optical and radar data are presented.
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Andreea Maria Julea. Extraction de motifs spatio-temporels dans des séries d'images de télédétection : application à des données optiques et radar. Autre. Université de Grenoble, 2011. Français. ⟨NNT : 2011GRENA013⟩. ⟨tel-00652810⟩

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