Defocus Detection - HIKVISION iDS-9664NXI-M8/X User Manual

5. Set the detection rules.
1) Select Exception Detection.
2) Check Audio Loss Exception, Sudden Increase of Sound Intensity Detection, and/or Sudden
Decrease of Sound Intensity Detection.
Audio Loss Exception
Detects a steep sound rise in the scene. Set Sensitivity and Sound Intensity Threshold for
the steep sound rise.
Sensitivity
The smaller the value is, the more severely the change would trigger the detection. Range
[1-100].
Sound Intensity Threshold
It can filter the sound in the environment. The louder the environment sound is, the higher
the value should be. Adjust it according to the environment. Range [1-100].
Sudden Decrease of Sound Intensity Detection
Detects a steep sound drop in the scene. Detection sensitivity [1-100].
6. Set the arming schedule. Refer to Configure Arming Schedule .
7. Set the linkage actions. Refer to Configure Linkage Actions .
8. Click Apply.

6.2.10 Defocus Detection

Image blur caused by lens defocus can be detected.
Steps
1. Go to Smart Analysis → Smart Event Settings → Other Events .
2. Select a camera.
3. Click Defocus.
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