The Evaluation of Classifier Performance during Fitting Wrist and Finger Movement Task Based on Forearm HD-sEMG

Figure 8

Confusion matrix (serial numbers at the bottom represent the number of the real acquired coordinated actions in Figure 2, and the numbers on the left represent actions compounded by the fingers and wrist actions after fitting corresponding to the numbered actions in Figure 2). For example, in the confusion matrix of the LDA classifier in Figure 8(a), the number “3.57” on the left indicates that the percentage probability for the classifier LDA to classify action No.7 (“wrist flexion with hand close”) in Figure 2 to be action No.10 (wrist ulnar with hand close) is 3.57%. (a) LDA, (b) KNN, (c) SVM, (d) RF.

(a)

(b)

(c)

(d)