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VIVOTEK
116 - User's Manual
► How does motion detection work?
There are two motion detection parameters: Sensitivity and Percentage. In the illustration above,
frame A and frame B are two sequential images� Pixel differences between the two frames are
detected and highlighted in gray (frame C) and will be compared with the sensitivity setting� Sensitivity
is a value that expresses the sensitivity to moving objects� Higher sensitivity settings are expected to
detect slight movements while smaller sensitivity settings will neglect them� When the sensitivity is set
to 70%, the Network Camera denes the pixels in the purple areas as “alerted pixels” (frame D).
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�
A
B D
C
NOTE: