Table 12. Confusion matrix of the proposed FER system that is trained on AFEW dataset and tested on CK+, JAFFE, MUG, USTC-NVIE, and IMFDB datasets of facial expressions (Unit: %).

Expressions	Happy	Anger	Sad	Surprise	Fear	Disgust
Happy	80	3	5	3	4	5
Anger	3	85	4	2	4	2
Sad	3	3	84	4	2	4
Surprise	3	2	4	83	3	5
Fear	3	4	3	2	82	6
Disgust	4	1	4	2	3	86
Average	83.33