Dahua NVR21-4KS3 Series User Manual page 268

2) Click
The system triggers an alarm only when the size of detected target is between the
maximum size and the minimum size.
3) Configure parameters.
Table 5-35 Parameters of abandoned object detection
Parameter
Preset
Name
Duration
4) Click OK.
Step 6 Configure alarm schedule and linkage.
Figure 5-141 Abandoned object rule
to draw the minimum size or maximum size to filter the target.
Description
Select a preset you want to use IVS.
Customize the rule name.
The system generates an alarm once the object is in the zone for the
defined period.
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User's Manual