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Sensitivity Analysis of the Scattering-Based SARBM3D Despeckling Algorithm

Synthetic Aperture Radar (SAR) imagery greatly suffers from multiplicative speckle noise, typical of coherent image acquisition sensors, such as SAR systems. Therefore, a proper and accurate despeckling preprocessing step is almost mandatory to aid the interpretation and processing of SAR data by hu...

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Autor principal: Di Simone, Alessio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4970023/
https://www.ncbi.nlm.nih.gov/pubmed/27347971
http://dx.doi.org/10.3390/s16070971
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author Di Simone, Alessio
author_facet Di Simone, Alessio
author_sort Di Simone, Alessio
collection PubMed
description Synthetic Aperture Radar (SAR) imagery greatly suffers from multiplicative speckle noise, typical of coherent image acquisition sensors, such as SAR systems. Therefore, a proper and accurate despeckling preprocessing step is almost mandatory to aid the interpretation and processing of SAR data by human users and computer algorithms, respectively. Very recently, a scattering-oriented version of the popular SAR Block-Matching 3D (SARBM3D) despeckling filter, named Scattering-Based (SB)-SARBM3D, was proposed. The new filter is based on the a priori knowledge of the local topography of the scene. In this paper, an experimental sensitivity analysis of the above-mentioned despeckling algorithm is carried out, and the main results are shown and discussed. In particular, the role of both electromagnetic and geometrical parameters of the surface and the impact of its scattering behavior are investigated. Furthermore, a comprehensive sensitivity analysis of the SB-SARBM3D filter against the Digital Elevation Model (DEM) resolution and the SAR image-DEM coregistration step is also provided. The sensitivity analysis shows a significant robustness of the algorithm against most of the surface parameters, while the DEM resolution plays a key role in the despeckling process. Furthermore, the SB-SARBM3D algorithm outperforms the original SARBM3D in the presence of the most realistic scattering behaviors of the surface. An actual scenario is also presented to assess the DEM role in real-life conditions.
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spelling pubmed-49700232016-08-04 Sensitivity Analysis of the Scattering-Based SARBM3D Despeckling Algorithm Di Simone, Alessio Sensors (Basel) Article Synthetic Aperture Radar (SAR) imagery greatly suffers from multiplicative speckle noise, typical of coherent image acquisition sensors, such as SAR systems. Therefore, a proper and accurate despeckling preprocessing step is almost mandatory to aid the interpretation and processing of SAR data by human users and computer algorithms, respectively. Very recently, a scattering-oriented version of the popular SAR Block-Matching 3D (SARBM3D) despeckling filter, named Scattering-Based (SB)-SARBM3D, was proposed. The new filter is based on the a priori knowledge of the local topography of the scene. In this paper, an experimental sensitivity analysis of the above-mentioned despeckling algorithm is carried out, and the main results are shown and discussed. In particular, the role of both electromagnetic and geometrical parameters of the surface and the impact of its scattering behavior are investigated. Furthermore, a comprehensive sensitivity analysis of the SB-SARBM3D filter against the Digital Elevation Model (DEM) resolution and the SAR image-DEM coregistration step is also provided. The sensitivity analysis shows a significant robustness of the algorithm against most of the surface parameters, while the DEM resolution plays a key role in the despeckling process. Furthermore, the SB-SARBM3D algorithm outperforms the original SARBM3D in the presence of the most realistic scattering behaviors of the surface. An actual scenario is also presented to assess the DEM role in real-life conditions. MDPI 2016-06-25 /pmc/articles/PMC4970023/ /pubmed/27347971 http://dx.doi.org/10.3390/s16070971 Text en © 2016 by the author; 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
Di Simone, Alessio
Sensitivity Analysis of the Scattering-Based SARBM3D Despeckling Algorithm
title Sensitivity Analysis of the Scattering-Based SARBM3D Despeckling Algorithm
title_full Sensitivity Analysis of the Scattering-Based SARBM3D Despeckling Algorithm
title_fullStr Sensitivity Analysis of the Scattering-Based SARBM3D Despeckling Algorithm
title_full_unstemmed Sensitivity Analysis of the Scattering-Based SARBM3D Despeckling Algorithm
title_short Sensitivity Analysis of the Scattering-Based SARBM3D Despeckling Algorithm
title_sort sensitivity analysis of the scattering-based sarbm3d despeckling algorithm
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4970023/
https://www.ncbi.nlm.nih.gov/pubmed/27347971
http://dx.doi.org/10.3390/s16070971
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