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VIVOTEK
128 - User's Manual
Applications > Tampering detection
This section explains how to set up camera tamper detection. With tamper detection, the
camera is capable of detecting incidents such as
redirection
,
blocking or defocusing
, or
even
spray paint
.
1. Enter the tamper trigger duration. (10 sec. ~ 10 min.). The duraction species the set of
time before the tampering is considered as a real alarm. This helps avoid false alarms
by short-lived changes.
The tamper alarm will be triggered only when the tampering factor (the difference
between current frame and pre-saved background) exceeds the trigger threshold.
Conditions such as image too dark, too bright, or too blurry (defocused) can also be
configured as tampering conditions. The Trigger threshold determines how sensitive
your is tamper detection setting. Lower the threshold number, easier to trigger.
2. You can configure Tampering Detection as a trigger element to the proactive event
congurations in
Event -> Event settings -> Trigger.
For example, when the camera is
tampered with, camera can be congured to send the pre- and post-event video clips to
a networked storage device. Please refer to page 111 for detailed information.
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