基于注意力机制的行人重识别特征提取方法

针对真实环境中非重叠多摄像头的行人重识别受到不同摄像机场景、视角、光照等因素的影响导致行人重识别精度低的问题，提出一种基于注意力机制的行人重识别特征提取方法。首先，使用随机擦除法对输入的行人图像进行数据增强，提高网络的鲁棒性；然后，通过构建自上而下的注意力机制网络增强空间像素特征的显著性，并将注意力机制网络嵌入ResNet50网络提取整个行人的显著特征；最后，将整个行人的显著特征进行相似性度量并排序得到行人重识别的结果。该注意力机制的行人重识别特征提取方法在Market1501数据集上Rank1达到88.53%，平均精度均值（mAP）为70.70%；在DukeMTMC-reID数据集上Rank1达到77.33%，mAP为59.47%。所提方法在两大行人重识别数据集上性能都有明显提升，具有一定的应用价值。

Pedestrian re-identification feature extraction method based on attention mechanism

Aiming at the problem of the low pedestrian re-identification accuracy with disjoint multiple cameras in real environment caused by different camera scenes, perspectives, illuminations and other factors, a pedestrian re-identification feature extraction method based on attention mechanism was proposed. Firstly, the random erasure method was used to enhance the data of the input pedestrian image in order to improve the robustness of the network. Then, by constructing a from-top-to-bottom attention mechanism network, the saliency of the spatial pixel feature was enhanced, and the attention mechanism network was embedded in the ResNet50 network to extract the entire pedestrian salient features. Finally, the similarity measurement and ranking were performed on the entire salient features of pedestrians in order to obtain the accuracy of pedestrian re-identification. The pedestrian re-identification feature extraction method based on attention mechanism has Rank1 of 88.53% and mAP （mean Average Precision） of 70.70% on the Market1501 dataset, and has Rank1 of 77.33% and mAP of 59.47% on the DukeMTMC-reID dataset. The proposed method has significantly improved performance on the two major pedestrian re-identification datasets, and has certain application value.