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142
Figure 8-14 Tripwire
Step 5 Click to draw rule lines in the image. Right-click to finish drawing.
Different rules have slightly different drawing requirements. After drawing rules, drag
corners of the detection area to adjust the area range.
Figure 8-15 Drawing rule
Table 8-5 Description of IVS analysis drawing rules
Rule Description
Crossing virtual
fence
Draw a detection line.
Tripwire
Intrusion Draw a detection area.
●
During the detection of abandoned objects, the alarm is also triggered
if pedestrian or vehicle stays for a long time. If the abandoned object is
smaller than pedestrian and vehicle, set the target size to filter
pedestrian and vehicle or properly extend duration to avoid false alarm
triggered by transient staying of pedestrian.
●
During the detection of crowd gathering, false alarm might be
triggered by low installation height, large percentage of single person
in an image or obvious target occlusion, continuous shaking of the
camera, shaking of leaves and tree shade, frequent opening or closing
of retractable door, or dense traffic or people flow.
Abandoned object
Missing object
Fast moving
Parking detection
Crowd gathering
Loitering detection
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