Figure 11: The result of using classifiers including the KNN, Regression Tree, SVM, Classification Tree, Naive Bayes, SVM-Regression, Ensemble Regression classifier for driver drowsiness detection based on single-channel C3, single-channel C4, single-channel P3, single-channel P4, single-channel O1, single-channel O2, and data of all channels {C3, C4, P3, P4, O1, O2} together