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Table 6 Various representative quality metrics considered in this study

From: Biometric quality: a review of fingerprint, iris, and face

Abbreviation Quality metric
SE Spectral energy
ES Edge spread
B Blockiness
A Activity
ZC Zero count
DF Defocus
M Motion
O Occlusion
L Lighting
S Specular reflectance
PC Pixel count
Q Fused iris quality
RE Ridge energy
NFIQ NIST fingerprint image quality
P Pose
F Focus