融合注意力机制和课程式学习的人脸识别方法  

Face Recognition Method Based on Attention Mechanism and Curriculum Learning

作　　者：王海勇[1,2] 潘海涛 刘贵楠 WANG Haiyong;PAN Haitao;LIU Guinan(College of Computer Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;Smart Campus Research Center,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学计算机学院,南京210023 [2]南京邮电大学智慧校园研究中心,南京210023

出　　处：《计算机科学与探索》2023年第8期1893-1903,共11页Journal of Frontiers of Computer Science and Technology

基　　金：国家自然科学基金(61872190);赛尔网络下一代互联网技术创新项目(NGII20190612);江苏省博士后科研资助计划项目(2020Z058)。

摘　　要：针对当前人脸识别算法中提取的人脸特征可区分性不强、难易样本区分度不够的问题,提出一种融合注意力机制和课程式学习的人脸识别算法(ECACFace)。该算法提出一种高效的空间通道注意力模块(ESCA)并将其融入特征提取网络的基本模块中,使用高效的通道注意力模块(ECA)获取通道关注度并在ECA之后加入空间注意力模块,在关注图像通道信息的基础之上进一步获取空间关注度,从而得到信息更加丰富的人脸特征向量用于人脸分类。同时在训练时引入基于课程式学习的损失函数,做到在训练过程中区分难易样本,并在前期着重训练简单样本,后期着重训练困难样本,实现有区分度的样本学习。在CASIAWebFace数据集上训练基于轻量级网络和浅层网络的ECACFace,与原始网络相比有超过1.5个百分点的精度提升。在百万规模的MS1MV2数据集上训练基于深层网络的ECACFace,在CPLFW数据集上比ArcFace精度提升了1.14个百分点,实验结果表明,融合ESCA模块和基于课程式学习的损失函数能够进一步提升人脸识别性能。Aiming at the problems that the facial features extracted from current face recognition algorithms are not distinguishable and the discrimination of difficult and easy samples is not enough,a face recognition algorithm combining attention mechanism and curriculum learning is proposed,which is called efficient cooperative attention and curriculum face(ECACFace).The algorithm proposes an efficient spatial channel attention module(ESCA)and integrates it into the basic module of the feature extraction network.The efficient channel attention module(ECA)is used to obtain the channel attention,and the spatial attention module is added after the ECA.On the basis of paying attention to the image channel information,the spatial attention is further obtained,and the face feature vector with richer information is obtained for face classification.At the same time,the loss function based on curriculum learning is introduced to distinguish the difficult and easy samples in the training process.The simple samples are trained in the early stage and the difficult samples are trained in the later stage to realize the discriminative sample learning.Training ECACFace based on lightweight network and shallow network on CASIA-WebFace dataset and it has an accuracy improvement of more than 1.5 percentage points compared with the original network.ECACFace based on deep network is trained on MS1MV2 dataset which has millions of data,and the accuracy tested on CPLFW dataset is increased by 1.14 percentage points compared with ArcFace.Experimental results show that the cooperation of ESCA module and the loss function based on curriculum learning can further improve the perfor mance of face recognition.

关 键 词：人脸识别 特征提取 课程式学习 注意力机制 

分 类 号：TP181[自动化与计算机技术—控制理论与控制工程]