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140
Sensitivity: Adjust the filter sensitivity. With higher value, it is easier to trigger an alarm
when low-contrast object and small object are captured, and the false detection rate is
higher.
Figure 8-13 Global configuration (IVS)
Step 6 Click
Apply
.
Related Operations
1. Select the verification type, and then click
Calibration Verification
.
To verify vertical ruler and horizontal ruler, respectively select
Height Verification
and
Width
Verification
.
2. Draw a straight line in the image to verify whether the rulers are correctly set.
In case of major difference between the estimated value and the actual one, fine-tune or reset
parameters until the error requirement is met.
8.2.2.2 Rule Configuration
This section introduces the rules used on IVS, including tripwire, intrusion, abandoned object,
missing object, fast moving, parking detection, crowd gathering, crossing virtual fence and loitering
detection.
Prerequisites
The global configuration for IVS has been completed.
Background Information
The roles and applicable scenes of various rules are as follows. The following section uses tripwire as
an example to introduce the rule configuration of IVS.
Table 8-4 Description of IVS functions
Rule Functions Applicable Scene
crossing
virtual fence
When a target crosses the fence
toward the defined direction, the
alarm is triggered and the linkage is
executed.
Scenes such as roads, airports and
other isolation zones.
Tripwire
When a target crosses the line toward
the defined direction, the alarm is
triggered and the linkage is executed.
Scenes with sparse targets and no
occlusion among targets, such as the
perimeter protection of unattended
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