Network Video Recorder User Manual
141
Follow these steps to set the detection rules and detection areas.
Select Arming Region. Up to 4 regions are selectable.
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.
Click Draw Region and draw a quadrilateral in the preview window by specifying four vertices
of the detection region.
Set the arming schedule. Refer to Chapter 11.1 Configure Arming Schedule.
Set the linkage actions. Refer to Chapter 11.2 Configure Alarm Linkage Actions.
Click Apply.
Audio Exception Detection
Purpose
Audio exception detection detects abnormal sounds in the surveillance scene, such as a sudden
increase/decrease in sound intensity.
Go to System > Event > Smart Event.
Click Audio Exception.
Audio Exception Detection
Select a camera to configure.
Optionally, check Save VCA Picture to save the captured audio exception detection pictures.
Set the detection rules:
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