Deep Covariance Descriptors for Facial Expression Recognition
N.Otberdout,A.Kacem,M.Daoudi,L.Ballihi,andS.Berretti,“Deepcovariancedescriptorsforfacialexpressionrecognition,”inBMVC,2018Abstract本文利用协方差矩阵对深度卷积神经网络(DCNN)特征进行编码,用于人脸表情识别。协方差矩阵的空间几何是对称正定矩阵的空间几何。通过在SPD流