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Network Video Recorder User Manual
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Please refer to the Chapter 9.2 Face Detection for operating steps to configure the scene
change detection.

The Sensitivity in the Rule Settings ranges from 1 to 100, and the higher the value is, the
more easily the change of scene can trigger the alarm.
11.12 Defocus Detection
Purpose:
The image blur caused by defocus of the lens can be detected, and some certain actions can be
taken when the alarm is triggered.

Please refer to the Chapter 9.2 Face Detection for operating steps to configure the defocus
detection.

The Sensitivity in the Rule Settings ranges from 1 to 100, and the higher the value is, the
more easily the defocus image can trigger the alarm.
11.13 PIR Alarm
Purpose:
A PIR (Passive Infrared) alarm is triggered when an intruder moves within the detector's field of
view. The heat energy dissipated by a person, or any other warm blooded creature such as dogs,
cats, etc., can be detected.
Step 1 Go to Menu > Camera > VCA .
Step 2 Select the camera to configure the VCA.
You can click the checkbox of Save VCA Picture to save the captured pictures of VCA
detection.
Step 3 Select the VCA detection type to PIR Alarm .
Step 4 Click to configure the trigger channel, arming schedule and linkage action for the PIR
alarm.
Step 5 Click the Rule Settings button to set the rules. Please refer to the Chapter 9.2 Face Detection
for instructions.
Step 6 Click Apply to activate the settings.