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Multitemporal SAR Image Despeckling Based on a Scattering Covariance Matrix of Image Patch

This paper presents a despeckling method for multitemporal images acquired by synthetic aperture radar (SAR) sensors. The proposed method uses a scattering covariance matrix of each image patch as the basic processing unit, which can exploit both the amplitude information of each pixel and the phase...

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Detalles Bibliográficos
Autores principales: Ma, Xiaoshuang, Wu, Penghai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6678814/
https://www.ncbi.nlm.nih.gov/pubmed/31373333
http://dx.doi.org/10.3390/s19143057
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author Ma, Xiaoshuang
Wu, Penghai
author_facet Ma, Xiaoshuang
Wu, Penghai
author_sort Ma, Xiaoshuang
collection PubMed
description This paper presents a despeckling method for multitemporal images acquired by synthetic aperture radar (SAR) sensors. The proposed method uses a scattering covariance matrix of each image patch as the basic processing unit, which can exploit both the amplitude information of each pixel and the phase difference between any two pixels in a patch. The proposed filtering framework consists of four main steps: (1) a prefiltering result of each image is obtained by a nonlocal weighted average using only the information of the corresponding time phase; (2) an adaptively temporal linear filter is employed to further suppress the speckle; (3) the final output of each patch is obtained by a guided filter using both the original speckled data and the filtering result of step 3; and (4) an aggregation step is used to tackle the multiple estimations problem for each pixel. The despeckling experiments conducted on both simulated and real multitemporal SAR datasets reveal the pleasing performance of the proposed method in both suppressing speckle and retaining details, when compared with both advanced single-temporal and multitemporal SAR despeckling techniques.
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spelling pubmed-66788142019-08-19 Multitemporal SAR Image Despeckling Based on a Scattering Covariance Matrix of Image Patch Ma, Xiaoshuang Wu, Penghai Sensors (Basel) Article This paper presents a despeckling method for multitemporal images acquired by synthetic aperture radar (SAR) sensors. The proposed method uses a scattering covariance matrix of each image patch as the basic processing unit, which can exploit both the amplitude information of each pixel and the phase difference between any two pixels in a patch. The proposed filtering framework consists of four main steps: (1) a prefiltering result of each image is obtained by a nonlocal weighted average using only the information of the corresponding time phase; (2) an adaptively temporal linear filter is employed to further suppress the speckle; (3) the final output of each patch is obtained by a guided filter using both the original speckled data and the filtering result of step 3; and (4) an aggregation step is used to tackle the multiple estimations problem for each pixel. The despeckling experiments conducted on both simulated and real multitemporal SAR datasets reveal the pleasing performance of the proposed method in both suppressing speckle and retaining details, when compared with both advanced single-temporal and multitemporal SAR despeckling techniques. MDPI 2019-07-11 /pmc/articles/PMC6678814/ /pubmed/31373333 http://dx.doi.org/10.3390/s19143057 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ma, Xiaoshuang
Wu, Penghai
Multitemporal SAR Image Despeckling Based on a Scattering Covariance Matrix of Image Patch
title Multitemporal SAR Image Despeckling Based on a Scattering Covariance Matrix of Image Patch
title_full Multitemporal SAR Image Despeckling Based on a Scattering Covariance Matrix of Image Patch
title_fullStr Multitemporal SAR Image Despeckling Based on a Scattering Covariance Matrix of Image Patch
title_full_unstemmed Multitemporal SAR Image Despeckling Based on a Scattering Covariance Matrix of Image Patch
title_short Multitemporal SAR Image Despeckling Based on a Scattering Covariance Matrix of Image Patch
title_sort multitemporal sar image despeckling based on a scattering covariance matrix of image patch
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6678814/
https://www.ncbi.nlm.nih.gov/pubmed/31373333
http://dx.doi.org/10.3390/s19143057
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