User Manual

Chapter 10: Camera setup
TruVision NVR 22 (S/P) User Manual 67
VCA setup
The configuration of each individual VCA (Video Content Analysis) event is done in the
camera browser. Within the recorder, you are able to link actions to a VCA alarm from
IP cameras that support this feature.
There are several types of VCA events to select. A series of linkage methods can be
triggered if a VCA event is detected. See Table 13 below.
Note: VCA events do not trigger recordings; they are marked in the recorder and allow
you to easily find the assisted video. It is recommended to use continuous recording or
to enable motion detection in combination with VCA events.
Table 13: VCA types
VCA event types Description
Face Detection When this function is enabled, the camera can detect a moving
object that is moving towards it, triggering a configurable response.
The camera can only detect a face looking directly into the camera,
not side views. This feature is best suited when the camera is in
front of a door or is located in a narrow corridor.
Cross Line Detected This function can be used to detect people, vehicles and objects
crossing a pre-defined line or an area on-screen. The line crossing
direction can be set as unidirectional or bidirectional. Unidirectional
is crossing the line from left to right or from right to left.
Bidirectional is crossing the line from both directions.
Perimeter Intrusion Detected You can set up an area in the surveillance scene to detect when
intrusion occurs. If someone enters the area, a set of alarm actions
can be triggered.
Enter Region Detected This function detects people, vehicles or other objects that enter a
designated region from outside the designated region.
Exit Region Detected Region exiting detection function detects people, vehicle or other
objects that exit from a designated region, and certain actions can
be configured to occur when the alarm is triggered.
Object Left Behind Detected Unattended baggage detection function detects the objects left in
the designated region such as baggage, a purse, dangerous
materials, etc.
Object Taken Detected Object removal detection function detects objects removed from a
designated region, such as exhibits on display.
Audio Input Exception Audio exception detection detects sounds that are above a
selected threshold.
Defocus Detected The camera can detect image blur caused by defocusing of the
lens, triggering a series of alarm actions.
The sensitivity level determines how much blur is tolerated by the
camera before triggering an alarm. When enabled, the camera
regularly checks the level of image focus (to allow for variations in
light during the day) and then compares the current image to that
of the reference image to see if there is a difference. A high
sensitivity level means that there cannot be a large variance
between the reference and current image.