User's Manual

Linux Visible Light Product User Manual 39
Item
Description
1:N Match Threshold
Under 1:N verification mode, the verification will only be successful when the
similarity between the acquired facial image and all registered facial templates is
greater than the set value. The valid value ranges from 65 to 120. The higher the
thresholds set, the lower the misjudgment rate, the higher the rejection rate, and vice
versa.
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 facial templates enrolled in the
device is greater than the set value. The valid value ranges from 55 to 120. The higher
the thresholds set, the lower the misjudgment rate, the higher the rejection rate, and
vice versa.
Face enrollment
threshold
During face registration, 1:N verification is used to determine whether the user has
been registered. The current face is registered
when the similarity between the
acquired facial image and all registered facial templates is greater than the set value.
Face pitch angle
To limit the pitch angle of face in face recognition, the recommended threshold is 20.
Face rotation angle
To limit the rotation angle of face in face recognition, the recommended threshold is
20.
Image Quality
To get the quality threshold of facial images. When the value of image quality is
greater than the set value, the device will accept the facial images and start the
algorithm processing, otherwise, the device will filter the facial images out.
LED light triggered
threshold
Detect ambient light intensity. When the ambient brightness is less than the
threshold, the fill light is turned on; When ambient brightness is greater than this
threshold, the fill light does not turn on. The default value is 80.
Motion Detection
Sensitivity
During face verification, the moving facial images collected in time are compared
with all the facial images in the device by the corresponding algorithm. If the value is
greater than or equal to the set value, it means that the verification passes; otherwise,
it means that the verification fails.
Live detection
If enabled, it will automatically detect whether there is a moving person in front of
the device.
Live detection
threshold
Detect whether there is a moving person in front of the device to determine whether
face recognition is enabled. The default value is 100. The valid value ranges from 0 to
100.
Notes
Improper adjustment of the exposure and quality parameters may severely affect the
performance of the device. Please adjust the exposure parameter only under the
guidance of the after-sales service personnel of our company.