Journal of Northeastern University(Natural Science) ›› 2024, Vol. 45 ›› Issue (4): 474-482.DOI: 10.12068/j.issn.1005-3026.2024.04.003

• Information & Control • Previous Articles    

Lightweight Ship Recognition Algorithm Based on SNN in SAR Images

Hong-tu XIE1, Jia-xing CHEN1, Lin ZHANG2, Nan-nan ZHU3   

  1. 1.School of Electronics and Communication Engineering,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China
    2.Air Force Early Warning Academy,Wuhan 430019,China
    3.School of Systems Science and Engineering,Sun Yat-sen University,Guangzhou 510275,China. Corresponding author: ZHU Nan-nan,E-mail: zhunn25@mail. sysu. edu. cn
  • Received:2022-12-09 Online:2024-04-15 Published:2024-06-26

Abstract:

Due to the more parameters and higher energy-consumption in the traditional methods for the synthetic aperture radar (SAR) image target recognition, this paper proposes a lightweight ship recognition algorithm based on the spiking neural network (SNN) in SAR images. Firsty, the visual attention mechanism is adopted to extract the visual saliency map from SAR images, and the Poisson encoder is adopted for the spike train encode, which can suppress the background noise interference. Then, combined with the leaky integrate-and-fire(LIF) spiking neuron and convolutional neural network, the SNN model integrating the time series information is constructed, which can realize the ship recognition in SAR images. Finally, the SNN model is optimized by using the arctangent function as the surrogate gradient function of the spiking emission function during the backpropagation, which can solve the problem that the SNN model is difficult to train. The experiment results show that the proposed algorithm has higher accuracy, fewer parameters, higher efficiency, and lower energy-consumption, which can achieve efficient and accurate ship recognition in SAR images.

Key words: synthetic aperture radar(SAR) image, ship recognition, spiking neural network (SNN), lightweight

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