NVR-3304POE, NVR-3308POE, NVR-3408POE-H2, NVR-3416
User’s manual ver.1.1.1
All rights reserved © AAT Holding S. A.
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To configure the settings you can choose the following fields :
FACE CHANNEL - information about the channel number for which you apply settings
FACE TRACK ENABLE - activates face tracking function
MIN - Change size for the blue rectangle to sets the minimum area for face detection. Faces smaller
than the minimum size set will not be detected.
MAX - Change size for the green rectangle to sets the maximum area for face detection. Faces bigger
the maximum size set will not be detected.
RESOLUTION - sets the resolution of the analyzed stream. Available resolutions depend on the
model and camera settings.
Field detection area is determined using the red square. To change the size of click on the corner of
the rectangle and move mouse pointer to change the size. To change position of the rectangle press
left mouse button, position of the area. The proportion of face in the screen is a critical factor for face
detection. The minimum height of face should be more than 8% of the screen and recommended
height is 20% of the screen. It is recommended not to exceed 30 degrees of horizontal and vertical an-
gle between camera and face plane.
There are several cases in which face detection may not work properly :
Strong backlight -
In strong backlight scenes, it’s better to choose good wide dynamic cameras
Strong point light source - When there is strong point light source in scene, you can turn off
automatic electronic shutter in camera to ensure normal of face brightness.
Image blur - Blurred image will lead to a decline in success rate of detection.
Low brightness - When the image brightness is too low, it is recommended to use a camera with
infrared supplemental lighting function
Image noise - Image noise is harmful factor which should be avoided.
Camera lens deformation - When the obvious image deformation caused by the lens will cause a
decline in the successful rate.
Black and White Image - When colour information of the image is lost, the success rate of face
detection will fall.
5.8.2. Preview of current face recognition.
Select on taskbar INTELLIGENCE EVENTS to display face recognition preview. Press left
muse button on face from list to display bigger preview windows.
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