SpeedFace M4
User Manual
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1:1 Threshold Value
Under 1:1 verification mode, the verification will only be successful when the
similarity between the acquired facial image and the facial templates enrolled
in the device is greater than the set value.
The valid value ranges from 0 to 100. 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 this 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 this 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 this 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
Image quality for facial registration and comparison. The higher the value, the
clearer the image will be.
Minimum Face Size
Required for facial registration and comparison.
If an object’s size is smaller than this set value, the object will be filtered and not
recognized as a face.
This value can be understood as the face comparison distance. The farther the
person is, the smaller the face is, and the smaller face pixel will be 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 Triggered
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.
