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Communication Dans Un Congrès Année : 2018

Geometric Multi-Wavelet Total Variation for SAR Image Time Series Analysis

Résumé

—A time series issued from modern synthetic aperture radar satellite imaging sensors is a huge dataset composed by many hundreds of million pixels when observing large-scale earth structures such as big forests or glaciers. A concise monitoring of these large scale structures for anomaly spotting thus requires loading and analyzing huge spatio/polarimetric multi-temporal image series. The contributions of the present paper for the sake of parsimonious analysis of such huge datasets are associated with a framework having two main processing stages. The first stage is the derivation of an index called geometric multi-wavelet total variation for fast and robust anomaly spotting. This index is useful for identifying significant abnormal patterns appearing as geo-spatial non-stationarities in multi-wavelet total variation map. The second stage consists in the proposal of a concise asymmetric multi-date change information matrix on regions associated with significant multi-wavelet total variations. This stage is necessary for a fine characterization of change impacts on existing geo-spatial structures. Experimental tests based on Sentinel-1 data show relevant results on a wide Amazonian forest surrounding the Franco-Brazilian Oyapock Bridge.
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Dates et versions

hal-01794292 , version 1 (17-05-2018)

Identifiants

  • HAL Id : hal-01794292 , version 1

Citer

Abdourrahmane Atto, Anoumou Kemavo, Jean-Paul Rudant, Grégoire Mercier. Geometric Multi-Wavelet Total Variation for SAR Image Time Series Analysis. International Conference on Information Fusion (FUSION 2018), Jul 2018, Ccambridge, United Kingdom. ⟨hal-01794292⟩
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