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Unsupervised Spatiotemporal Mining of Satellite Image Time Series Using Grouped Frequent Sequential Patterns

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8 Author(s)
Julea, A. ; Lab. d''Inf., Syst., Traitement de l''Inf. et de la Connaissance, Univ. de Savoie, Annecy-le-Vieux, France ; Méger, N. ; Bolon, P. ; Rigotti, C.
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An important aspect of satellite image time series is the simultaneous access to spatial and temporal information. Various tools allow end users to interpret these data without having to browse the whole data set. In this paper, we intend to extract, in an unsupervised way, temporal evolutions at the pixel level and select those covering at least a minimum surface and having a high connectivity measure. To manage the huge amount of data and the large number of potential temporal evolutions, a new approach based on data-mining techniques is presented. We have developed a frequent sequential pattern extraction method adapted to that spatiotemporal context. A successful application to crop monitoring involving optical data is described. Another application to crustal deformation monitoring using synthetic aperture radar images gives an indication about the generic nature of the proposed approach.

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:49 ,  Issue: 4 )