基于卷积神经网络和微动特征的人体步态识别技术

摘要

重要军事设施、交通枢纽、保密机构等场所存在安全隐患,保证这些场所安全是人们面临的严峻问题,因此对人体目标进行身份认证和识别具有重要意义.针对敏感场所内的人体目标身份认证问题,提出了一种基于卷积神经网络和微动特征的身份认证方法.在数据样本较小的情况下,模型训练容易“过拟合”.运用迁移学习的思想,首先用MNIST数据集预训练得到卷积神经网络分类模型,使模型具有抽象特征能力;然后再用人体微动数据集训练模型的分类器以用于分类识别.实验结果表明,该方法在走路样本测试集上达到了较高的识别率.%There are security risks of important military facilities,transportation hubs,security agencies and other places.Using radar to collect human body echo signals for feature extraction and target classification is an efficient method to ensure the safety of these places.There is less data on human radar echoes that people can acquire in a limited time.In the case of smaller data samples,the problem of over-fitting is easy in the process of model training.And this will lead to the accuracy of the target classification decreased.In this paper,a method of identity authentication based on convolution neural network and micro-motion feature is proposed.We use the idea of transfer learning.First,the convolution neural network classification model is preliminarily trained with the MNIST data set.We make the model have the ability of abstract the features and enter the model of human micro-motion samples to obtain the feature.And then model classifier is further trained by the human body micro-motion data.Finally,we get the training sample test the accuracy of the model.The experimental results show that the accuracy of this method is greatly improved compared with other approaches.