Page 72 of
102.
Title NetVu Uniplex Appliance NVR Advanced Installation Manual
UK and EMEA: NetVu Ltd.
No 1 Thellow Heath Park, Northwich Road, Northwich, Cheshire. CW9 6JB
•
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%.
•
Pixel Change (%): Percentage value of the overall change required, over the complete range
of black to white, to be included in the pixel count. A 100% pixel change would be from
black to peak white. Default is 20%.
To create a VMD zone:
1.
Select the desired zone.
2.
Position the mouse pointer at the top left-hand corner of the zone and then left click.
3.
Move the mouse to the bottom right-hand corner of the zone and then right click.
A rectangle will then be displayed based on these two selected points.
Clicking Reload Img (Red) will reload the image behind the grid editor.
Clicking Clear All (Green) will clear (i.e. de-select) all the zones in the grid editor.
Clicking Default Grid (Yellow) will create 16 equally sized zones in a 4 x 4 grid with zone 1 in the
top left-hand corner and zone 16 in the bottom right-hand corner.
Click the Save button when you have finished, in order to save the changes that you have made.
Alarm
– Schedule page
The page configures how the NVR will move between two modes, SET and UNSET.
