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SAR ATR for Limited Training Data Using DS-AE Network

Although automatic target recognition (ATR) with synthetic aperture radar (SAR) images has been one of the most important research topics, there is an inherent problem of performance degradation when the number of labeled SAR target images for training a classifier is limited. To address this proble...

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Autores principales: Park, Ji-Hoon, Seo, Seung-Mo, Yoo, Ji-Hee
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8271368/
https://www.ncbi.nlm.nih.gov/pubmed/34283072
http://dx.doi.org/10.3390/s21134538
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author Park, Ji-Hoon
Seo, Seung-Mo
Yoo, Ji-Hee
author_facet Park, Ji-Hoon
Seo, Seung-Mo
Yoo, Ji-Hee
author_sort Park, Ji-Hoon
collection PubMed
description Although automatic target recognition (ATR) with synthetic aperture radar (SAR) images has been one of the most important research topics, there is an inherent problem of performance degradation when the number of labeled SAR target images for training a classifier is limited. To address this problem, this article proposes a double squeeze-adaptive excitation (DS-AE) network where new channel attention modules are inserted into the convolutional neural network (CNN) with a modified ResNet18 architecture. Based on the squeeze-excitation (SE) network that employs a representative channel attention mechanism, the squeeze operation of the DS-AE network is carried out by additional fully connected layers to prevent drastic loss in the original channel information. Then, the subsequent excitation operation is performed by a new activation function, called the parametric sigmoid, to improve the adaptivity of selective emphasis of the useful channel information. Using the public SAR target dataset, the recognition rates from different network structures are compared by reducing the number of training images. The analysis results and performance comparison demonstrate that the DS-AE network showed much more improved SAR target recognition performances for small training datasets in relation to the CNN without channel attention modules and with the conventional SE channel attention modules.
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spelling pubmed-82713682021-07-11 SAR ATR for Limited Training Data Using DS-AE Network Park, Ji-Hoon Seo, Seung-Mo Yoo, Ji-Hee Sensors (Basel) Article Although automatic target recognition (ATR) with synthetic aperture radar (SAR) images has been one of the most important research topics, there is an inherent problem of performance degradation when the number of labeled SAR target images for training a classifier is limited. To address this problem, this article proposes a double squeeze-adaptive excitation (DS-AE) network where new channel attention modules are inserted into the convolutional neural network (CNN) with a modified ResNet18 architecture. Based on the squeeze-excitation (SE) network that employs a representative channel attention mechanism, the squeeze operation of the DS-AE network is carried out by additional fully connected layers to prevent drastic loss in the original channel information. Then, the subsequent excitation operation is performed by a new activation function, called the parametric sigmoid, to improve the adaptivity of selective emphasis of the useful channel information. Using the public SAR target dataset, the recognition rates from different network structures are compared by reducing the number of training images. The analysis results and performance comparison demonstrate that the DS-AE network showed much more improved SAR target recognition performances for small training datasets in relation to the CNN without channel attention modules and with the conventional SE channel attention modules. MDPI 2021-07-01 /pmc/articles/PMC8271368/ /pubmed/34283072 http://dx.doi.org/10.3390/s21134538 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Park, Ji-Hoon
Seo, Seung-Mo
Yoo, Ji-Hee
SAR ATR for Limited Training Data Using DS-AE Network
title SAR ATR for Limited Training Data Using DS-AE Network
title_full SAR ATR for Limited Training Data Using DS-AE Network
title_fullStr SAR ATR for Limited Training Data Using DS-AE Network
title_full_unstemmed SAR ATR for Limited Training Data Using DS-AE Network
title_short SAR ATR for Limited Training Data Using DS-AE Network
title_sort sar atr for limited training data using ds-ae network
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8271368/
https://www.ncbi.nlm.nih.gov/pubmed/34283072
http://dx.doi.org/10.3390/s21134538
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