We propose a new synthetic aperture radar (SAR) despeckling technique based on nonlocal filtering and driven by a coregistered optical image. A preliminary homogeneous versus heterogeneous classification of the image is used to decide where the optical guide can be safely used, thus preventing any distortion of the SAR geometry. Even in regions where the use of optical data is enabled, despeckling is carried out exclusively in the SAR domain, and the optical guide is used only to improve the predictor selection in nonlocal filtering and, hence, in the estimation process. Experiments on real-world imagery confirm the potential of the proposed approach.

Optical-Driven Nonlocal SAR Despeckling / Verdoliva, Luisa; Gaetano, Raffaele; Ruello, Giuseppe; Poggi, Giovanni. - In: IEEE GEOSCIENCE AND REMOTE SENSING LETTERS. - ISSN 1545-598X. - 12:2(2015), pp. 314-318. [10.1109/LGRS.2014.2337515]

Optical-Driven Nonlocal SAR Despeckling

VERDOLIVA, LUISA;GAETANO, RAFFAELE;RUELLO, GIUSEPPE;POGGI, GIOVANNI
2015

Abstract

We propose a new synthetic aperture radar (SAR) despeckling technique based on nonlocal filtering and driven by a coregistered optical image. A preliminary homogeneous versus heterogeneous classification of the image is used to decide where the optical guide can be safely used, thus preventing any distortion of the SAR geometry. Even in regions where the use of optical data is enabled, despeckling is carried out exclusively in the SAR domain, and the optical guide is used only to improve the predictor selection in nonlocal filtering and, hence, in the estimation process. Experiments on real-world imagery confirm the potential of the proposed approach.
2015
Optical-Driven Nonlocal SAR Despeckling / Verdoliva, Luisa; Gaetano, Raffaele; Ruello, Giuseppe; Poggi, Giovanni. - In: IEEE GEOSCIENCE AND REMOTE SENSING LETTERS. - ISSN 1545-598X. - 12:2(2015), pp. 314-318. [10.1109/LGRS.2014.2337515]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/586479
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 29
  • ???jsp.display-item.citation.isi??? 25
social impact