Table 3. Accuracy comparison of different techniques on the CK+ dataset. The best records are highlighted in bold.

Model	Baseline	CED	HOG	Proposed
SGD	0.8528	0.8477	0.8629	0.9035
RF	0.8274	0.8121	0.8680	0.9086
ET	0.8375	0.8121	0.8731	0.9086
HGB	0.8426	0.8324	0.8528	0.9188