SpeedFace-V5L Series
User Manual
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1:1 Match Threshold
Under 1:1 verification mode, the verification will only be successful when the
similarity between the acquired facial image and the user’s facial templates
enrolled in the device is greater than the set value.
The valid value ranges from 55 to 120. The higher the thresholds, the lower the
misjudgement rate and the higher the rejection rate, and vice versa. It is
recommended to set the default value of 63.
Face Enrollment
Threshold
During face enrollment, 1:N comparison is used to determine whether the user
has already registered before.
When the similarity between the acquired facial image and all registered facial
templates is greater than the set threshold, it indicates that the face has already
been registered.
Face Pitch Angle
It is the pitch angle tolerance of a face for facial template registration and
comparison.
If a face’s pitch angle exceeds the set value, it will be filtered by the algorithm,
i.e., ignored by the terminal thus no registration and comparison interface will
be triggered.
Face Rotation Angle
It is the rotation angle tolerance of a face for facial template registration and
comparison.
If a face’s rotation angle exceeds the set value, it will be filtered by the
algorithm, i.e., ignored by the terminal thus no registration and comparison
interface will be triggered.
Image Quality
It is the image quality for facial registration and comparison. The higher the
value, the clearer image is required.
Minimum Face Size
It sets the minimum face size required for facial registration and comparison.
If the minimum size of the captured image is smaller than the set value, then it
will be filtered off and not recognized as a face.
This value can also be interpreted as the face comparison distance. The farther
the individual is, the smaller the face, and the smaller number of pixels of the
face obtained by the algorithm. Therefore, adjusting this parameter can adjust
the farthest comparison distance of faces. When the value is 0, the face
comparison distance is not limited.
LED Light Trigger
Threshold
This value controls the turning on and off of the LED light. The larger the value,
the LED light will turn on or off more frequently.
Motion Detection
Sensitivity
It sets the value for the amount of change in a camera’s field of view known as
potential motion detection that wakes up the terminal from standby to the
comparison interface.
The larger the value, the more sensitive the system would be, i.e., if a larger
value is set, the comparison interface activates with much ease, and the motion
detection is frequently triggered.
Live Detection
It detects the spoof attempt using visible light images to determine if the
provided biometric source sample is of a real person (a live human being) or a
false representation.
Live Detection
Threshold
It facilitates judging whether the captured visible image is a real person (a live
human being). The larger the value, the better the anti-spoofing performance
using visible light.
