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Figure 5-22 Tripwire
Step 3 Click Draw Rule to draw rule line in the image. Right-click to finish drawing.
For requirements of drawing rules, see Table 5-7. After drawing rules, drag corners of
the detection area to adjust the area range.
Table 5-7 Description of IVS analysis
Draw a detection area.
During the detection of abandoned object, 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 the 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.
Step 4 (Optional) Click Draw Target at the right side of Target Filter, and then draw the target
in the image.
When the rule of crowd gathering is configured, you do not need to set target filter,
but draw the minimum gathering area. Click Draw Target 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 area and the duration.
Click Clear to delete all drawn detection lines.
Click Draw Target at the right side of Pixel Counter, and then press and hold the
left mouse button to draw a rectangle, the Pixel Counter then displays its pixel.
Step 5 Set rule parameters for IVS. For details, see Table 5-8.
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