Table 1. Recognition results with different parameters in the weighted Fisher criterion.

	RA (%)
	δ = 4	δ = 5	δ = 6	δ = 7	δ = 8
k = 3	68.00	68.67	70.03	67.77	70.53
k = 4	87.33	82.97	85.00	86.64	85.33
k = 5	93.67	92.34	91.80	93.00	91.67
k = 6	98.87	99.50	98.53	97.23	97.23