Table 2.

Recognition performance of symbolic modeling approach with GSGEF features in low resolution face images with different mask window size and integer polynomial order

Mask size	Computation time in seconds				Recognition accuracy at α = 2 in %
	AR	ORL	LFW	VISA Face	AR	ORL	LFW	VISA Face
F = 3 × 3	0.004	0.004	0.006	0.004	92.34	99.75	96.20	87.14
F = 5 × 5	0.003	0.003	0.006	0.004	91.88	97.86	95.83	85.01
F = 7 × 7	0.003	0.004	0.006	0.004	97.45	98.56	97.02	85.83
F = 11 × 11	0.003	0.004	0.006	0.004	85.03	97.88	99.73	84.71
F = 13 × 13	0.003	0.004	0.006	0.004	85.97	98.12	99.13	84.58

Bold values represents the best recognition rate and computation time for 3 × 3 mask size