To configure a measurement
1
In the VCA Settings section, click the button for the measurement you wish to configure.
The measurement's settings display.
2
Select the Enable box, if necessary.
3
Set the alarm threshold to your requirements.
Note that you can set two thresholds for Exposure (under- and overexposure) and
Contrast (low and high contrast).
4
Set the Hysteresis.
5
Click the Configure Alarms button and set the Min. event duration, if desired.
6
Click the Configure Evaluation Rate button and modify this setting, if desired.
11.10.5
Region of Interest (ROI)
Video > Image Monitor > ROI Settings
ROI preview
Pressing Show ROI>> in the ROI Settings section opens a preview with a grid overlay. You
can use it to mask portions of the image you wish to exclude from monitoring. Certain regions
can disrupt the measurements or be of no importance. You may want to filter out a bright
source of light, a region with low contrast, or differences in focus, for example. The part of the
image that you have not selected on creating the mask is called the Region of Interest (ROI).
To set a mask
● To edit the mask, click on the grid that is put over the image.
One or more mask elements at, and possibly around, that position, are produced.
● Hold the standard mouse button and drag, to 'brush' (i.e. mask) larger areas, with a
'Normal', 'Small', or 'Large' brush.
● Use the 'Invert Mask' button to reverse a selection.
● Hold the right mouse button and drag, to erase mask areas.
● Use the 'Save' button to store the mask in the unit.
Video
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