Network Video Recorder User Manual
136
Step 6
Follow these steps to set the detection rules and detection areas.
1)
Select an Arming Region to configure. Up to 4 regions are selectable.
2)
Drag the sliders to set Time Threshold and Sensitivity.
Time Threshold:
The time of the objects removed from the region. If the value is 10,
alarm will be triggered after the object disappears from the region for 10s. Its range is
[5s-20s].
Sensitivity:
The similarity degree of the background image. If the sensitivity is high, a very
small object taken from the region will trigger the alarm.
3)
Click
Draw Region
and draw a quadrilateral in the preview window by specifying four vertices of
the detection region.
Step 7
Set the arming schedule. Refer to Chapter 11.1 Configure Arming Schedule.
Step 8
Set the linkage actions. Refer to Chapter 11.2 Configure Alarm Linkage Actions.
Step 9
Click
Apply
.
12.9 Audio Exception Detection
Purpose
Audio exception detection detects abnormal sounds in the surveillance scene, such as a sudden
increase/decrease in sound intensity.
Step 1
Go to
System > Event > Smart Event
.
Step 2
Click
Audio Exception
.
Figure 12-9
Audio Exception Detection
Step 3
Select a
camera
to configure.
Step 4
Optionally, check
Save VCA Picture
to save the captured audio exception detection pictures.
Step 5
Set the detection rules: