User Manual

VIVOTEK
64 - User's Manual
Percentage is a value that expresses the proportion of “alerted pixels” to all pixels in the motion
detection window. In this case, 50% of pixels are identied as “alerted pixels”. When the percentage is
set to 30%, the motions are judged to exceed the dened threshold; therefore, the motion window will
be outlined in red�
For applications that require a high level of security management, it is suggested to use higher
sensitivity settings and smaller percentage values�
Camera tampering detection
This section explains how to set up camera tempering detection� With tampering 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 tampering detection function:
1� Check Enable camera tampering detection�
2� Enter the trigger duration� (10 sec� ~ 10 min�) The alarm will be triggered only when the tampering
factor (the difference between current frame and pre-saved background) exceeds the trigger threshold�
3� Set up the event source as Camera tampering detection on Application > Event settings > Trigger�
Please refer to page 76 for detailed information�
4� Click on Save to take effect�