作者:\n\t李靖宇，程卫月，林克正，苗壮，李骜\n

Authors:\n\tLI Jingyu, CHENG Weiyue, LIN Kezheng, MIAO Zhuang, LI Ao \n
摘要:\n\t为了增强神经网络特征提取能力进一步提高人脸表情识别准确率，提出了一种联合损失下深度可分离残差网络模型DSResNet-JLoss(deeply separable residual network under joint loss)，该网络是基于深度可分离卷积与残差学习方法的轻量级网络模型。使用逐通道卷积和逐点卷积的方法取代常规卷积运算，解决了传统卷积神经网络参数冗余大，训练时间长收敛慢，且易过拟合的问题。并在网络中加入残差单元，使用shortcut连接，通过恒等映射，来解决因网络模型层数过多导致的梯度爆炸或衰减问题。提出联合损失函数，充分结合了交叉熵损失，中心损失和对比损失的优点，以减小表情特征的类内距离，增大类间距离。实验表明，该模型在FERPlus和RAF-DB两个公开数据集上均取得较好的成绩，表现出良好的泛化能力和鲁棒性。\n

Abstract:\n\tIn order to enhance the feature extraction ability of neural network and further improve the accuracy of facial expression recognition, this paper proposes a deep separable residual network model under joint loss DSResNet-Jloss.This network is a lightweight network model based on deep separable convolution and residual learning methods.The method of channel-by-channel convolution and point-by-point convolution is used to replace the conventional convolution operation, which solves the problems of traditional convolutional neural network with large parameter redundancy, long training time, slow convergence, and easy overfitting.And add residual unit to the network, use shortcut connection, through identity mapping, to solve the problem of gradient explosion or attenuation caused by too many layers of the network model.A joint loss function is proposed, which fully combines the advantages of cross-entropy loss, center loss and contrast loss to reduce the intra-class distance of expression features and increase the inter-class distance.Experiments show that the model has achieved good results on the two public data sets of FERPlus and RAF-DB, showing good generalization ability and robustness.\n


PDF全文下载地址:

可免费Download/下载PDF全文