Table 10. Confusion matrix of the proposed FER system that is trained on USTC-NVIE dataset and tested on CK+, JAFFE, MUG, IMFDB, and AFEW datasets of facial expressions (Unit: %).

Expressions	Happy	Anger	Sad	Surprise	Fear	Disgust
Happy	91	1	3	2	0	3
Anger	4	85	2	2	4	3
Sad	3	2	88	3	3	1
Surprise	1	2	3	90	2	2
Fear	3	2	2	3	86	4
Disgust	1	1	2	3	5	88
Average	88.00