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CONFIG. /INTELLIGENT ANALYSIS
3. Double Virtual Fence
Deployment Area Settings
Drawing a line: Move the cursor to the drawing interface, hold down the le mouse buon, and move the
cursor to draw a line. When you release the le mouse buon, two virtual fences are generated. Choose one
to set the direcon to Positve or Reverse.
Seng double virtual fence: Click one of the double virtual fences (and the virtual fence turns red) to select
this virtual fence and set the direcon to Posive or Reverse, or delte the selected line. You can also press
and hold le mouse buon at the endpoint of a virtual fence and move the mouse to modify the posion and
length of the virtual fence. You can do right-click to delete the double virtual fences as shown in Figure 6-9
Figure 6-9 Deployment Area Setting Interface
Note
• The two virtual fences are in sequenal order. An alarm is generated only when a target crosses virtual
fence 1 and then virtual fence 2 within the set maximum passing me.
• The double virtual fences are not within any deployment area, therefore, when an alarm is generated, the
trace always exists. Only when the target object moves out of the eld of view, the trace disappears.
• Try to draw double virtual fences in the middle, because the recognion of a target takes me aer target
appearance on the screen and an alarm is generated only when the object is recognized to have crossed
the double virtual fences.
• The double virtual fences which detect human shapes as the recognion target cannot be too short,
because short double virtual fences tend to miss targets.
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