A Dual-Polarization Information-Guided Network for SAR Ship Classification

Synthetic aperture radar (SAR) is an advanced active microwave sensor widely used in marine surveillance. As part of typical marine surveillance missions, ship classification in synthetic aperture radar (SAR) images is a significant task for the remote sensing community. However, fully utilizing pol...

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Bibliographic Details
Published in:Remote sensing (Basel, Switzerland) Switzerland), 2023-04, Vol.15 (8), p.2138
Main Authors: Shao, Zikang, Zhang, Tianwen, Ke, Xiao
Format: Article
Language:English
Subjects:
Accuracy
Artificial satellites in remote sensing
Classification
Deep learning
Design
Dual polarization radar
Feature extraction
Information processing
Machine learning
Microwave sensors
Neural networks
Polarization
Polarization characteristics
polarization-guided
Radar
Radar imaging
Remote sensing
Sensors
ship classification
Surveillance
Synthetic aperture radar
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Summary:Synthetic aperture radar (SAR) is an advanced active microwave sensor widely used in marine surveillance. As part of typical marine surveillance missions, ship classification in synthetic aperture radar (SAR) images is a significant task for the remote sensing community. However, fully utilizing polarization information to enhance SAR ship classification remains an unresolved issue. Thus, we proposed a dual-polarization information-guided network (DPIG-Net) to solve it. DPIG-Net utilizes available dual-polarization information from the Sentinel-1 SAR satellite to adaptively guide feature extraction and feature fusion. We first designed a novel polarization channel cross-attention framework (PCCAF) to model the correlations of different polarization information for feature extraction. Then, we established a novel dilated residual dense learning framework (DRDLF) to refine the polarization characteristics for feature fusion. The results on the open OpenSARShip dataset indicated DPIG-Net’s state-of-the-art classification accuracy compared with eleven other competitive models, which showed the potential of DPIG-Net to promote effective and sufficient utilization of SAR polarization data in the future.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs15082138