Vivotek FD8133V User Manual page 64

VIVOTEK
NOTE
► How does motion detection work?
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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
is a value that expresses the sensitivity to moving objects. Higher sensitivity settings are expected to
to 70%, the Network Camera defines 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 identified as "alerted pixels". When the percentage is
set to 30%, the motions are judged to exceed the defined threshold; therefore, the motion window will
64 - User's Manual
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