基于注意力网络的地基SAR永久散射体选取方法

GBSAR Permanent Scatterer points selection algorithm based on attention network

  • 摘要: 永久散射体法(Permanent Scatterer,PS)是地基合成孔径雷达(Ground-Based Synthetic Aperture Radar,GBSAR)形变监测的技术支撑,但使用传统多阈值法选取PS点时,会存在各个区域对阈值敏感性不同的问题。为解决选取PS点时漏选或错选的问题,本文提出一种注意力网络模型对GBSAR时序数据进行PS点筛选,并将该模型与循环神经网络(Recurrent Neural Network,RNN)和长短期记忆网络(Long Short-Term Memory,LSTM)进行对比实验,应用于三个不同场景的监测来比较选取PS点的结果。实验结果表明:基于注意力网络的模型的实时性比RNN模型更好,准确度比LSTM模型更高。因此基于注意力网络的模型在PS点选取上更具优势。

     

    Abstract: The selection of Permanent Scatterer (PS) points is the key technology of Ground Based Synthetic Aperture Radar (GBSAR) deformation inversion. However, when using the traditional threshold method to select PS points, there is a problem that each region has different sensitivity to the threshold. To solve the problem of missing or wrong selection when selecting PS points, this paper proposes a model based on attention network to process radar sequence data for PS point selection, compared with the recurrent neural network (RNN) and long short term memory (LSTM) by screening PS point of three regions. The experimental results show that the real-time performance of the attention network based model is better than that of the RNN model, and its accuracy is higher than that of the LSTM model. Therefore, the model based on attention network has more advantages in PS point selection.

     

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