Table 10.

Comparison of proposed works with ECNR technique and other works on AR dataset

Method	Illumination variation(S1)	Expression changes (S2)	Occlusion (S3)	Occlusion and illumination (S4 + S5)
ECNR	98.75	88.33	92.50	82.50
Symbolic approach + PFFT	98.54	98.81	89.79	95.67
Symbolic approach + DGM	91.67	95.24	96.94	94.00
Symbolic approach + SGEF	96.46	97.14	90.82	92.67
Symbolic approach + GSGEF	96.46	95.48	88.78	94.33
NN + PFFT	100	100	98.98	88.00
NN + DG	91.88	96.91	68.37	84.67
NN + SGEF	97.71	98.33	84.69	96.67
NN + GSGEF	92.29	94.29	76.53	91.33
SVM + PFFT	99.58	99.52	90.82	95.00
SVM + DG	95.00	99.05	90.82	93.67
SVM + SGEF	95.42	96.90	80.61	90.33
SVM + GSGEF	89.90	92.86	80.61	87.33
PNN + PFFT	93.54	96.19	72.45	87.33
PNN + DG	96.04	95.00	84.69	86.33
PNN + SGEF	93.54	93.33	77.55	91.33
PNN + GSGEF	91.05	93.81	82.65	88.67