多通道特征融合改进DenseNet的人体姿态识别方法

    Human Posture Recognition Method with Multi-channel Feature Fusion and Improved DenseNet

    • 摘要: 针对现有基于毫米波雷达的人体姿态识别泛化能力差、识别精度低的问题,提出了一种基于毫米波雷达多通道特征(MCF)融合改进密集连接网络(DenseNet)的多通道密集特征选择网络模型(MCF-SE-DenseNet)模型。根据天线布局对雷达回波进行处理,得到微多普勒信息、俯仰信息、方位信息,将多通道特征融合成三维矩阵,更加准确地在空间上体现人体姿态特征。将注意力机制嵌入DenseNet,注意力机制模块选用压缩激励(SE)模块,多通道特征融合后的三维矩阵转换为特征图作为改进DenseNet的输入,使得重要特征的权重增加,提高人体姿态识别准确率。实验表明,多通道特征融合与SE模块的嵌入可以使识别准确率提高6.2% 以上,可以有效提升网络模型性能,MCF-SE-DenseNet模型最终识别准确率可达98% 以上。

       

      Abstract: To address the issues of poor generalization and low recognition accuracy in existing millimeter-wave radar-based human pose recognition methods, we propose a multi-channel feature selection dense network (MCF-SE-DenseNet). This model integrates multi-channel feature (MCF) fusion to improve the DenseNet architecture. Leveraging the antenna array configuration, radar echoes are processed to extract micro-Doppler information, elevation information and azimuth information. These multi-channel features are fused into a 3D matrix to spatially characterize human posture with higher fidelity. The Squeeze-and-Excitation (SE) module, an attention mechanism, is embedded into the densely connected network. The fused 3D matrix is converted into feature maps as input for the enhanced DenseNet, which dynamically amplifies the weights of critical features, thereby significantly improving pose recognition accuracy. Experimental results demonstrate that the combined use of multi-channel feature fusion and the SE module increases recognition accuracy by more over 6.2%, effectively enhancing model performance. The final recognition accuracy of the MCF-SE-DenseNet model exceeds 98%.

       

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