Efficient Iris Recognition Based on Optimal Subfeature Selection and Weighted Subregion Fusion

Table 4

Comparison of the computation complexity.

Methods	Feature extraction (ms)	Matching (ms)	Feature extraction + Matching (ms)	Others
Daugman [3]	682.5*	4.3*	686.8*	—
Wildes et al. [4]	210.0*	401.0*	611.0*	Registration
Boles and Boashash [5]	170.3*	11.0*	181.3*	—
Ma et al. [6]	260.2*	8.7*	268.9*	Feature reduction
Ma et al. [7]	244.2*	6.5*	250.7*	—
Roy and Bhattacharya [46]	80.3^∧	167.2^∧	247.5^∧	Feature reduction
Roy and Bhattacharya [47]	20.3^∧	130.4^∧	150.7^∧	Feature reduction
Proposed; (CASIA-V3 Interval)	89.6	48.7	138.3	Feature reduction & sub-region fusion
Proposed; (CASIA-V3 Lamp)	96.7	53.0	149.7	Feature reduction & sub-region fusion

Note. Data labeled by *come from Ma et al. [7] and ^∧come from Roy and Bhattacharya [47].