Vivotek VS8801 Specifications download pdf (Page 67)

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User's Manual - 67

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 79 for detailed information.

4. Click on Save to take effect.

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Vivotek VS8801 Specifications Page 67