Florence Tupin

SEMINAIRE DU 4 JUIN 2015 – 16H @ MAP5 – SALLE DU CONSEIL

Joint phase denoising and unwrapping for 3D reconstruction in
multi-channel SAR interferometry: combining patch-based non-local
filtering and total variation regularization

SAR (Synthetic Aperture Radar) systems are powerful imaging systems allowing height retrieval thanks to interferometric phase measurements (InSAR). While a single interferometric phase implies a phase unwrapping step, multi-channel InSAR systems reduce ambiguities for height retrieval but still provide very noisy measurements.

In this work we investigate how the combination of patch-based approaches and total variation minimization (TV) improve 3D InSAR reconstruction.
After a brief introduction to SAR imagery and InSAR acquisition, the adaptation of non-local methods to complex vectorial data will be presented. Then a non local likelihood term is introduced in the TV regularization framework, and optimized thanks to a graph-cut minimization approach. Results on synthetic and real InSAR data will be discussed.

This work is a joint work with C. Deledalle (IMB), L. Denis (Laboratoire Hubert Curien), and G. Ferraioli (Parthenope University, Naples, Italy).

 

L’ORATRICE

Florence Tupin est professeur au LTCI, et responsable de l’équipe Traitement et Interprétation des Images.