激光与光电子学进展, 2019, 56 (14): 141504, 网络出版: 2019-07-12   

基于多尺度卷积特征融合的行人重识别 下载: 1645次

Person Reidentification Based on Multiscale Convolutional Feature Fusion
作者单位
江南大学物联网工程学院物联网应用技术教育部工程中心, 江苏 无锡 214122
摘要
针对现有的基于卷积神经网络的行人重识别方法对于遮挡和复杂背景引起的判别信息缺失问题,提出了一种基于多尺度卷积特征融合的行人重识别算法。在训练阶段,使用金字塔池化方法对卷积特征图进行分块和池化,获得包含全局特征和多尺度局部特征的多个特征向量;对每一个特征向量进行独立分类,并在各个分类的最后内积层上归一化权重和特征,以提升分类性能;最后使用梯度下降法优化全部的分类损失。在识别阶段,将池化后的多个特征向量融合成一个新向量,使用新向量在库中进行相似性匹配。在Market-1501、DukeMTMC-reID数据库上对所提算法的有效性进行实验验证。结果表明,本文模型提取的特征具有更好的识别效果,Rank-1精度和平均准确率也优于大多数先进算法。
Abstract
Existing methods of person reidentification based on convolutional neural network lack discriminative information, due to occlusion and complex backgrounds. To solve these problems, a method based on multi-scale convolutional feature fusion is proposed herein. In the training phase, pyramid pooling is used to extract multiple eigenvectors containing global features and multi-scale local features for blocking and pooling of the convolutional feature map. Afterward, each feature vector is classified independently, and the weights and features on the last inner layer of each class are normalized to improve the classification performance. Finally, a gradient descent algorithm is applied to optimize the sum of losses for each classification. In the recognition phase, pooled multiple feature vectors are concatenated into a new vector for similarity matching. The efficiency of the proposed algorithm is verified on datasets Market-1501 and DukeMTMC-reID, in which the results indicate that features obtained by the proposed model are more discriminative and that the Rank-1 accuracy and average accuracy are both better than most state-of-the-art algorithms.

徐龙壮, 彭力. 基于多尺度卷积特征融合的行人重识别[J]. 激光与光电子学进展, 2019, 56(14): 141504. Longzhuang Xu, Li Peng. Person Reidentification Based on Multiscale Convolutional Feature Fusion[J]. Laser & Optoelectronics Progress, 2019, 56(14): 141504.

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