Table 9. Confusion matrix of the proposed FER system that is trained on MUG dataset and tested on CK+, JAFFE, USTC-NVIE, IMFDB, and AFEW datasets of facial expressions (Unit: %).

Expressions	Happy	Anger	Sad	Surprise	Fear	Disgust
Happy	89	2	3	1	2	3
Anger	3	87	2	4	1	3
Sad	4	3	84	3	4	2
Surprise	3	4	3	83	2	5
Fear	1	2	3	3	88	3
Disgust	2	2	4	3	3	86
Average	86.17