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Table 8-6 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
Step 6 (Optional) Click other icons at the right side of the image to filter targets in the image.
●
Click to draw the minimum size of the detection target and click to draw the
maximum size of the detection target. Only when the target size is between the
maximum size and the minimum size, can the alarm be triggered.
●
When the rule of crowd gathering is configured, you need to draw the minimum
gathering area. Click to draw the minimum gathering area in the scene. The alarm
is triggered when the number of people in the detection area exceeds the minimum
and the time exceeds the duration.
●
Click , and then press and hold the left mouse button to draw a rectangle, the pixel
size is displayed.
●
Click to delete the detection line.
Step 7 Set rule parameters for IVS.
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