Dahua HDBW2831R-ZAS, Operation Manual

Page: 165 / 256

Operation Manual
152
Table 5-8 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 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.
Table 5-9 Description of IVS parameters
Parameter Description
Direction
Set the direction of rule detection.
●
When setting cross fence detection and tripwire, select A->B ,
B->A , or A<->B .
●
When setting intrusion, select Enters , Exits , or Enter&Exit .
Action When setting intrusion action, select
Appears
or
Cross
.
Object tracking
Select Object Tracking to enable this function. When alarm is
triggered by a moving object, select 1P+3 or 1P+5 as the object
tracking display mode in the
Live interface. Then the tracking scene
follows the moving object until the object is out of the camera range.
For details, see "4.2.4 Window Adjustment Bar".
This function is available on some select models.
Track linkage
Select AlarmTrack and set the tracking time. When alarm is