User Manual

VIVOTEK
User's Manual - 63
A green bar indicates that even though motions have been detected, the event has not been triggered
because the image variations still fall under the dened threshold.
This motion detection window will also be displayed on the Event Settings page� You can go to
Application > Event Settings > Trigger to choose it as a trigger source� Please refer to page 76 for
detailed information
.
NOTE
► 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 Video Server denes the pixels in the purple areas as “alerted pixels” (frame D).