“…In the machine learning studies [ 29 , [173] , [174] , [175] , [176] , [177] , [178] ], SVM are employed for emotion recognition. KNN [ 179 , 180 ], ANN [ 181 , 182 ], RF [ 31 ], Decision Tree (DT) [ 183 ], MLP [ 184 ], RGNN, FG-SVM [ 185 ], LSSVM [ 186 ], MC-SVM [ 184 ] are employed for recognize the human emotions (see Fig. 20 Overview of the ER based on ML mothed).…”