Page 35 of 51.
Title NetVu Uniplex Desktop NVR Advanced Installation Manual
NetVu Ltd.
No 1 Thellow Heath Park, Northwich Road, Northwich, Cheshire. CW9 6JB
Alarm
– VMD Setup page
Video Motion Detection enables a greater degree of control over detection settings and
configuration than the Activity Setup function. Each of the 16 VMD Zones can be directly sized and
configured to suit specific requirements.
Global Activity Mode: Controls the way in which activity detection will work:
•
Always Active: allows Activity mode to be in constant operation (for non-PTZ cameras).
•
Active while at Preset 1: will result in Activity mode functioning only when the camera is at
preset position 1 (for PTZ cameras).
•
Active while camera not in motion: allows Activity mode to function only when the camera
is still (for PTZ cameras).
The camera to be configured can be selected by clicking on the down arrow on the right-hand side
of the Camera field and then clicking on the camera name from the drop-down list.
There are 16 VMD zones within the image that can be individually configured.
VMD Zone: Select the desired zone from the drop-down list.
Mode: The zone mode controls when the reference image is taken for triggering. This can be one
of the following choices, selected from the drop-down list:
•
Normal: The reference image is updated approximately every second. This will only allow
small changes in the scene without triggering.
•
Last trigger: The reference image is only updated when the VMD is triggered and is best
used under controlled lighting to avoid false triggers due to ambient light changes.
•
Static: The reference image is collected on start-up and is never updated. This would be
used in "sterile" areas where there are no changes expected.
•
Pixel Count (%): Percentage of pixels in the selected zone that must change for the VMD
event to be triggered. Default is 20%.
