基于边缘特征引导学习的SAR目标检测
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南京邮电大学

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国家自然科学基金项目(编号:62101280);江苏省自然科学基金项目(编号:BK20210588);中国博士后科学基金资助项目(编号:2023M731781);江苏省航空对地探测与智能感知工程中心开放基金项目(编号:JSECF2023-05);雷达成像与微波光子技术教育部重点实验室(南京航空航天大学)基金项目(编号:NJ20230005);


SAR Object Detection Based on Edge Feature Guided Learning
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Nanjing University of Posts and Telecommunications

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National Natural Science Foundation of China(No.62101280), Natural Science Foundation of Jiangsu Province(No.BK20210588), Project funded by China Postdoctoral Science Foundation(No.2023M731781), Open Foundations of Jiangsu Province Engineering Research Center of Airborne Detecting and Intelligent Perceptive Technology(No.JSECF2023-05), Key Laboratory of Radar Imaging and Microwave Photonics, Nanjing University of Aeronautics and Astronautics, Ministry of Education(No.NJ20230005)

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    摘要:

    合成孔径雷达(Synthetic Aperture Radar,SAR)图像目标通常具有不明显的边缘特征,且不同尺度的下的目标边缘特征并不完全相同,现有的SAR目标检测方法并没有对于边缘特征进行学习,导致模型对于边缘特征的感知能力有待提高。基于此,本文提出一种基于边缘特征引导学习(Edge Feature Guided Learning, EFGL)的SAR目标检测方法,该方法基于FCOS(Fully Convolutional One-Stage Object Detection)目标检测框架,主要将利用目标边缘特征引导特征金字塔网络(Feature Pyramid Networks, FPN)的特征学习,通过在FPN中引入边缘算子模块,显式增强网络对不同尺度目标边缘特征的学习能力;另外,在多尺度特征融合过程中,构建边缘特征引导融合模块,利用融合边缘特征的空间注意力模块实现边缘特征引导的相邻层级特征融合。在MSAR数据集和SAR-Aircraft-1.0数据集上,本文方法在AP’07标准下分别达到了68.68%和67.44%的检测精度,比基础网络提升了1.34%和4.81%。与其他相关算法相比,本文方法能够更好地进行目标定位,且SAR目标检测性能更优。

    Abstract:

    Synthetic Aperture Radar (SAR) image targets usually have unobvious edge features, and target edge features at different scales are not exactly the same. Existing SAR target detection methods do not learn edge features, resulting in The model's ability to perceive edge features needs to be improved. Based on this, this paper proposes a SAR target detection method based on Edge Feature Guided Learning (EFGL). This method is based on the FCOS (Fully Convolutional One-Stage Object Detection) target detection framework and mainly uses the target edge features to guide Feature learning of Feature Pyramid Networks (FPN) explicitly enhances the network’s ability to learn edge features of targets at different scales by introducing an edge operator module into FPN; in addition, during the multi-scale feature fusion process, edges are constructed The feature-guided fusion module uses the spatial attention module that fuses edge features to achieve adjacent-level feature fusion guided by edge features. On the MSAR dataset and SAR-Aircraft-1.0 dataset, this method achieved detection accuracy of 68.68% and 67.44% respectively under the AP’07 standard, which was 1.34% and 4.81% higher than the basic network. Compared with other related algorithms, this method can perform better target positioning and has better SAR target detection performance.

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  • 收稿日期:2024-04-26
  • 最后修改日期:2024-10-17
  • 录用日期:2024-10-30
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