DS2 Setup Guide

Dedicated Micros ©2007
86
DS2
Camera 01
VMD zones
VMD grid
VMD test
Edit
Setup
Walktest
A
dvanced VMD Zones
VMD Zones
This option allows the VMD Zone conguration options to be accessed.
Zone
Zone 01 Mode
Zone 01 pixel count
Zone 01 pixel change
01
Normal
20%
20%
01 - 16
Normal, Last trigger, Static, Zone disabled
02 - 100%
02 - 100%
C
amera
0
1 VMD Zones
Zone
There are settings that can be congured for each of the 16 advanced VMD zones, each can be
selected for conguration within this option. Use the or buttons to scroll through the zones.
Zone XX Mode
The Zone Mode identies when the reference image is taken for triggering VMD. The options
available are:
• Normal - the reference image is updated approx. every second to allow small changes in
the scene without triggering.
• Last trigger - the reference image is only updated when the VMD is triggered, and would
be used under controlled lighting conditions to avoid false triggers due to ambient light
changes.
• Static - the reference image is collected on startup and is never updated. This would be
used in a “sterile” area where there are no changes expected.
• Zone disabled - this will disable the zone mode.
Zone XX Pixel Count
This value equates to the percentage of pixels that must change in the selected zone for the VMD
event to be triggered.
Note:
This should be tested after conguration.
Zone XX Pixel Change
This setting is a percentage value of the overall change required in the greyscale to be included in
the pixel count. The percentage change is dened over the complete range of black to white, 100%
pixel change would be a change from black to peak white.
Note:
This setting should be tested after conguration to ensure the settings are sufcient to
trigger a VMD event.