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20
3. Try changing the location of the device a few times
a. Please make sure that the height of the face of the person to be recognized is located at angle
no less than 15° down and no more than 15° up from the camera (see picture below), so that the
camera can most effectively recognize a person’s facial features.
b. Please be centered, do not move too far to the left or to the right (no farther away than a 30
°
angle on each side).
c. Please make sure that the face to be identified is within 1 to 3 meters away from from the
device, so that the features can be most effectively recognized.
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