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6.2.17 Sudden Scene Change Detection
Scene change detection detects the change of the surveillance environment affected by external
factors, such as the intentional rotation of the camera.
Steps
1. Go to Smart Analysis → Smart Event Settings → Other Events.
2. Select a camera.
3. Click Sudden Scene Change.
4. Check Enable.
5. Optional: Check Save VCA Picture to save the captured sudden scene change detection pictures.
6. Set the detection sensitivity.
Sensitivity
Ranges from 1 to 100, the higher the value, the more easily the change of scene can trigger
the alarm.
7. Set the arming schedule. Refer to Configure Arming Schedule.
8. Set the linkage actions. Refer to Configure Linkage Actions.
9. Click Apply.
6.2.18 PIR Alarm
A PIR (Passive Infrared) alarm is triggered when an intruder moves within the detector vision field.
The heat energy dissipated by a person or any other warm blooded creature such as dogs, cats,
Network Video Recorder User Manual
Figure 6-18 Sudden Scene Change
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