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Appendix D: Motion Detection Adjustment
After selecting “Motion detection” from the main settings screen, you may need to expand the size of the display
window towards the right to see the 4 controls for individual motion detection windows.
Each window can have individually adjustable sensitivity and threshold.
In general, motion detection works by comparing the current video frame with the averages of the previous video
frames. Any difference is considered to be motion, and the sensitivity adjustment can be used to make the camera
more aware or less aware of small amounts of motion.
Internet Explorer can show you a live indicator for motion: When there is motion, a blue level appears between
the sensitivity and threshold slider as shown in the picture. More blue means more motion. To trigger an alarm
(and hence send out emails or upload to an FTP server etc) the detected amount of motion needs to be larger
than the threshold setting. If the blue level does not reach the threshold setting the motion is ignored.
If you do not use the Internet Explorer you can adjust the settings by entering the desired coordinates for the
windows. A window covering the entire 640 x 480 screen would cover 0-639 horizontally and 479 because they
start at 0, not 1 ) an example covering just the top half of the screen would use top left of 0, 0 and bottom right
639, 239.
To reduce the chance of false alarms you would increase the threshold (move threshold slider to right) or decrease
sensitivity (move sensitivity slider to left) .
Typically, you would just observe the field of view of the camera through this motion detection menu for a while
and make adjustments to threshold, sensitivity, and placement f the motion detection windows until you are
pretty certain that you’ve turned everything exactly right.
Please note that it generally does not make sense to define windows if the camera is not mounted securely. If it is
just sitting on a desktop the slightest movement of the camera would invalidate your windows positions.
