6.4 Face Parameters

 1: 1 Threshold: This parameter is 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 55─120. The higher the threshold, the lower the FAR and the higher the FRR are, and vice versa.
1:1: N Threshold: This parameter is 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 65─120. The higher the threshold, the lower the FAR and the higher the FRR are, and vice versa.

The recommended thresholds are as follows:
 Exposure: This parameter is used to set the exposure value of the camera.
Gain: This parameter is used to set the gain value of the camera.
Quality: This parameter is used to set a quality threshold for the face images obtained. The device accepts the face images and processes them by adopting the face algorithm when their quality is higher than the threshold; otherwise, it filters these face images.

Note: Improper adjustment of the Exposure, Gain and Quality parameters may severely affect the performance of the device. Please adjust the Exposure parameter only under the guidance of the aftersales service personnel from our company.