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Table 1 Mean area, standard deviation (S. D.), and % coefficient of variation (% C.V.) of four pores, taken from fingerprints obtained from the left thumb of four individuals on glass, recorded on ten consecutive days, show % C. V. to be beyond the normal acceptable level (with 5% confidence level in analytical work), thereby demonstrating that pore area is not a reproducible feature for matching fingerprints

From: Reproducibility of fingerprint microfeatures

Pore Mean area (μm2) S. D. % C. V.
Individual 1 Pore 1 8693.00 4153.93 47.78
Pore 2 5622.57 2708.89 48.18
Pore 3 6249.84 3724.90 59.60
Pore 4 2325.52 1810.10 77.84
Individual 2 Pore 1 10414.51 5041.71 48.41
Pore 2 11558.77 3697.71 31.99
Pore 3 9512.30 4919.25 51.71
Pore 4 6235.20 4779.94 76.66
Individual 3 Pore 1 14472.17 6724.79 46.47
Pore 2 13626.06 7352.19 53.96
Pore 3 10455.74 4306.36 41.19
Pore 4 6852.05 6062.52 88.48
Individual 4 Pore 1 15944.53 8125.33 50.96
Pore 2 13277.69 7301.54 54.99
Pore 3 13472.14 8225.55 61.06
Pore 4 13874.03 6822.22 49.17