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2)
Check the checkbox for <Sudden Increase of Sound Intensity Detection> to detect a steep
rise of the sound in the surveillance scene. You can set the detection sensitivity and the
threshold for steep rise in the sound.
<Sensitivity>
: Range [1-100], the smaller the value is, the more severe the change should
be to trigger the detection.
<Sound Intensity Threshold>
: Range [1-100], it can filter the sound in the environment,
the louder the environmental sound, the higher the value should be. You can adjust it
according to the real environment.
3)
Check the checkbox for <Sudden Decrease of Sound Intensity Detection> to detect a steep
drop in the sound in the surveillance scene. You can set the detection sensitivity [1-100]
for a steep drop in the sound.
6.
Click <Apply> to activate the settings.
10.14 Defocus Detection
This function may not be available in each recorder model.
The image blur caused by a defocus of the lens can be detected and certain actions can be taken
when the alarm is triggered.
Note:
‒
Please refer to
Chapter 9.1 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.
10.15 Sudden Scene Change
This function may not be available in every recorder model.
The Scene Change detection function detects any change in the surveilled environment that is
affected by the external factors such as the intentional rotation of the camera. Certain actions
can be taken when the alarm is triggered.
Note:
‒
Please refer to
Chapter 9.1 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 the scene can trigger the alarm.
‒
For analog cameras, the line crossing detection and intrusion detection conflict with other VCA
detection such as Sudden Scene Change Detection, Face Detection and Vehicle Detection. You
can only enable one function. If you have enabled the Line Crossing Detection or the Intrusion
Detection, then an attention box will pop up whenever you try to enable the Sudden Scene
