Note For Face Detection - GeoVision GV-IP Series User Manual

Note for Face Detection

To use the camera's built-in face detection feature (see 4.6.7 Face Detection), not supported
by GV-SD2322-IR, it is recommended to install the camera according to the criteria listed
below:
Surveillance Condition
•
The camera shall be installed at a site with uniform, sufficient lighting, where the
face(s) to be detected are fully illuminated.
Example of Recommended Scene
Camera Position
•
The camera shall be mounted at a recommended height of 2.5 ~ 3 m (8.2 ~ 9.84).
•
The camera shall be mounted with a recommended depression angle of around 10°.
•
The camera shall be positioned so that the face(s) to be detected are directly aligned
with the lens of the camera, with a horizontal deviation of no greater than 30°, a
vertical deviation of no greater than 15° and a face size of at least 120 pixels.
Surveillance
area width
viii
Example of Non-recommended Scene
Horizontal line
Depression angle α
Optical axis of
the camera
Pedestrian walking direction
(straight along the center of
the ground)
Horizontal surveillance distance