Dahua Technology DH-IPC-EBW81242N-AS-S2 12MP Outdoor Network Panoramic Fisheye Camera with Night Vision - Manual (Page 132)

Operation Manual
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Table 8-8 Description of IVS analysis
Rule Description
Tripwire Draw a detection line.
Intrusion 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.
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 target, and click to draw the maximum
size of the 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 do not need to set target filter, but
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 area and 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.
Table 8-9 Description of IVS parameters
Parameter Description
Direction
Set the direction of rule detection.
● When setting tripwire, select A->B , B->A , or A<->B .
● When setting intrusion, select Enter , Exit , or Both .
Action When setting intrusion action, select Appears or Cross .
Target Filter
Click to enable this function.
● When you select Human as the alarm target, an alarm will be
triggered when the system detects that persons trigger the rule.
● When you select Motor Vehicle as the alarm target, alarm will be
triggered when the system detects that vehicle triggers the rule.