Dahua NVR41 series User Manual

User's Manual
237
Table 4-44
Parameter
Description
Preset
Set the preset point for IVS detection according to the actual
needs.
Name
Customize the rule name.
Duration
Set the minimum time that the object stays until the alarm is
triggered.
Filter target
Click to filter the target. Check the blue wireframe and adjust
the size of the area with the mouse.
Each rule can set 2 target filters (maximum size and minimum
size), that is, when the passing target is smaller than the minimum
target or larger than the maximum target, no alarm will be
generated. The maximum size should not be smaller than the
minimum size.
3) Draw a rule. Left click mouse to draw a zone, until you draw a rectangle, you can
right click mouse.
4) Click
OK
to complete the rule setting.
Step 3 Click , you can refer to "4.7.2.4.1 Tripwire" to set other parameters.
Step 4 Click
Apply
to complete the setup.
4.7.2.4.7 Missing Object Detection
System generates an alarm when there is missing object in the specified zone.
Step 1 In the
Type
drop-down list, select
Missing Object
.
The interface is shown as below. See Figure 4-147.
Figure 4-147
Step 2 Draw the detection rule.

Dahua NVR41 series Specifications

General

Brand	Dahua
Model	NVR41 series
Category	Network Hardware
Language	English