Digital Watchdog MegaPix DWC-MVT4WiA User Manual page 44

2. The background color (like floor color) of the installation shall be light color.
3. The lens of the camera shall be adjusted straight down, allowed a little bit incline but
the whole head must be captured.
4. The installation height of the camera depends on the actual focal length of the lens.
The hallway shall take up over a half of the width of the entire image and the head of
the people shall be about 1/5 of the height of the entire image. Reserving certain space
on both sides makes the hallway lie in the center of the entire image.
The recommending height of installation as shown below:
5. More than two directions of people flow are not allowed in the scenes.
6. Various changeable lights will disturb the people counting and the darker scenes will
reduce the accuracy of counting.
7. If the camera is installed in a higher place, the head feature will not be traced
completely due to too little proportion of the head of the figure in the picture.
8. If the figure is moving at a high speed (passing the detected area within 2 seconds),
it may result in detection failure. If the figure is moving at a low speed, staying more
than 15 seconds in the detected area, the camera will give up tracing.
9. If the cloth color of the people is similar with the color of the background, it may
cause detection failure.
10. More headwears probably conceal the head features, which will lead to detection
failure.
Lens Mounting height
2.8mm 2.6 ~ 3.2m
3.3mm 3.0 ~ 4.0m
3.6mm 3.3 ~ 5.0m
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