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Table 2 Various behavioral, environmental, and operational factors that effect quality of biometric sample

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

Factors Possible causes
User traits Tiredness, distractions, motivation, cooperation, fear, makeup, appearance, facial hair, clothes, or hats
User-sensor interactions Indoor/outdoor, background, temperature, humidity, illumination, and ambient noise
Operational Familiarity, quality feedback, sensor cleaning, supervising operator, and time between acquisition