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d.
Adjust or move the created target area if necessary
2.
Name the specified Gate. In this example, Gate No. 1 is labeled as "Gate1"
3.
Set the Background Refresh Time (1s - 1800s). Same as Surveillance target zone (Area).
4.
Configure Detection Size (10p - 100p). Same as Surveillance target zone (Area).
5.
Configure Detection Sensitivity (10% - 97%). Same as Surveillance target zone (Area).
6.
Configure Object Speed (20p - 300p). The Object Speed value determines the speed
at which the object has to be moving in order to be counted by the Count option.
Object Speed:
When motion occurs on the screen, DVMS analyzes consecutive frames, in which motion
has occurred, and decides whether the occurred motion(s) represents one same object.
The only way this could be determined is by the speed with which the object moves
across the screen. In the diagram on the left, two consecutive frames are analyzed. The
distance that the object has traveled between two consecutive frames equals d.
In order to be counted as a single object, the distance that the object travels between 2
frames has to be smaller than the Object Speed parameter value. If the distance traveled
exceeds the Object Speed, the motion will not be counted as an object. Since DVMS
analyzes digital images, the distance is measured in pixels (20 pixel - 300 pixel).
If the Object Speed is set to 40 pixels, and the moving car has traveled 45 pixels on the
screen in 2 consecutive frames, it will not be counted. The Object Speed has to be set
based on experiment. The value will depend on the environment and customer needs.
7.
Set the Activity Weight (1-10) The Activity Weight option is for adjusting the number
of blocks that will set off the alarm. For example, if the Detection Size of one block is set
to10 pixels, and the Activity Weight is set to 3, it will take at least 3 blocks (30 pixel) for
the alarm to go off.
8.
The Gate is represented with the green arrow pointing in one direction with the number
in the middle. The number shows how many times the motion was detected in the spe-
cified direction. To reset the number, click Reset.
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