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2.2.11 Tampering
The Tampering setting can be found under this path:
System> Tampering
.
Tampering Alarm function helps the IP Camera against tampering such as
deliberate redirection, blocking, paint spray, and lens cover, etc through video
analysis and reaction to such events by sending out notifications or uploading
snapshots to the specified destination(s).
Detection of camera tampering is achieved by measuring the differences
between the older frames of video (which are stored in buffers) and more recent
frames.
Tampering Alarm
Users are able to turn on/off Tampering Alarm function in Tampering Alarm
setting page. The default setting is Off.
Tampering Duration
Minimum Tampering Duration is the time for video analysis to determine
whether camera tampering has occurred. Minimum Duration could also be
interpreted as defining the Tampering threshold; longer duration represents
higher threshold. Settable Tampering Duration time range is from 10 to 3600
seconds. The Default value is 20 seconds.
Triggered Action (Multi-option)
The Administrator can specify alarm actions that will take when tampering is
detected. All options are listed as follows:
Enable Alarm Output
Check the item and select the predefined type of alarm output to enable
alarm output when tampering is detected.
Record stream to SD Card
Select this item and the Tampering Alarm recording will be stored in
Micro SD/ SDHC card when tampering is detected.
Pre-trigger buffer recording function allows users to check what
happened to cause the trigger. The pre -trigger buffer time range is from
1 to 3 seconds.