Acroprint TQ600F Manual do Utilizador descarregar pdf (Página 26)

6.3 Face Parameters

• 1: 1 Threshold: Used to set the threshold of matching between the current face and the face template enrolled in the

device in the 1:1 verification mode. If the similarity between the current face and the face template enrolled in the device is

larger than this threshold, the matching is successful; otherwise, the matching is not successful. The valid value scope is

70-120. The higher the threshold, the lower the False Acceptance Rate (FAR) and the higher the False Rejection Rate (FRR)

are, and vice versa.

• 1: N Threshold: Used to set the threshold of matching between the current face and the face template enrolled in

the device in the 1: N verification mode. If the similarity between the current face and the face template enrolled in

the device is larger than this threshold, the matching is successful; otherwise, the matching is not successful. The

valid value scope is 80-120. The higher the threshold, the lower the FAR and the higher the FRR are, and vice

versa.

Recommended Thresholds Values

Threshold

(FRR) (FAR)

1: N 1: 1

High Low 45 25

Medium Medium 35 15

Low High 25 10

• Exposure: This parameter is used to set the exposure value of the camera.

• Quality: This parameter is used to set a min. quality (accuracy) threshold for a successful comparison. The device

captures face images and compares them to face templates stored in the terminal using a face algorithm. When

the accuracy of the comparison is higher than the threshold a successful punch is recorded.

Note: Improper adjustment of the Exposure and Quality parameters may severely affect the performance of the

device.

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Acroprint TQ600F Manual do Utilizador Página 26