Dahua NVR52-4KS2 Series User Manual page 288

2. Click to draw the minimum size or maximum size to filter the target.
The system triggers an alarm only when the size of detected target is between the
maximum size and the minimum size.
3. Configure parameters.
Parameter
Preset
Name
Duration
4. Click OK.
Step 6 Configure alarm schedule and linkage.
Figure 5-154 Missing object
Table 5-39 Parameters of missing object detection
Description
Set the preset point for IVS detection according to the actual needs.
Customize the rule name.
Set how long the object stays until the alarm is triggered.
272
User's Manual