VIVOTEK
120 - 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.
Please follow the steps below to set up the camera tamper detection function:
1. Click to select the checkbox before tampering conditions: Tampering detection, Image
too dark, Image too bright, and Image too blurry. Enter the tamper trigger duration.
(10 sec. ~ 10 min.) 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.
Too bright: shining a flash light. The average lighting level of the scene is taken into
consideration.
Too dark: covering the objective or spraying paint.
Too blurry: blurry scene can be the result of strong interference on the device, such as
EMI interference.
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 103 for detailed information.
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