TruVision NVR 22 Series, Руководство пользователя

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Chapter 10: Camera setup
TruVision NVR 22 (SP) User Manual 75
VCA setup
The configuration of each individual VCA (Video Content Analysis) event is done in the
camera browser. Within the recorder, you can 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 12 below.
Note: VCA events use event recording settings.
Table 12: 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
in a narrow corridor.
Audio Exception Detection Audio exception detection detects sounds that are above a selected
threshold.
Cross Line Detection 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.
Intrusion Detection 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.
Defocus Detection 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.
Scene Change You can configure the camera to trigger an alarm when the camera
detects a change in the scene caused by a physical repositioning of the
camera.
Enter Region Detection This function detects people, vehicles or other objects that enter a
designated region from outside the designated region.
Exit Region Detection 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 Detection Unattended baggage detection function detects the objects left in the
designated region such as baggage, a purse, dangerous materials, etc.
Object Removed Detection Object removal detection function detects objects removed from a
designated region, such as exhibits on display.