Feature Enhancement Pyramid and Shallow Feature Reconstruction Network for SAR Ship Detection

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Abstract

Recently, convolutional neural network based methods have been studied for ship detection in optical remote sensing images. However, it is challenging to apply them to microwave synthetic aperture radar (SAR) images. First, most of the regions in the inshore scene include scattered spots and noises, which dramatically interfere with ship detection. Besides, SAR ship images contain ship targets of different sizes, especially small ships with dense distribution. Unfortunately, small ships have fewer distinguishing features making it difficult to be detected. In this article, we propose a novel SAR ship detection network called feature enhanced pyramid and shallow feature reconstruction network (FEPS-Net) to solve the above problems. We design a feature enhancement pyramid, which includes a spatial enhancement module to enhance spatial position information and suppress background noise, and the feature alignment module to solve the problem of feature misalignment during feature fusion. Additionally, to solve the problem of small ship detection in SAR ship images, we design a shallow feature reconstruction module to extract semantic information from small ships. The effectiveness of the proposed network for SAR ship detection is demonstrated by experiments on two publicly available datasets: SAR ship detection dataset and high-resolution SAR images dataset. The experimental results show that the proposed FEPS-Net has advantages in SAR ship detection over the current state-of-The-Art methods.

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APA

Bai, L., Yao, C., Ye, Z., Xue, D., Lin, X., & Hui, M. (2023). Feature Enhancement Pyramid and Shallow Feature Reconstruction Network for SAR Ship Detection. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 16, 1042–1056. https://doi.org/10.1109/JSTARS.2022.3230859

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