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21.04.2020
Version 1.18.0
Structure and function
APS-90, APS-180 and APS-90-Outdoor-PoE
3.2.1
Counting
3.2.1.1
Counting lines
A counting line is represented by a colored polyline with lettered points at floor level.
Fig. 17: Counting lines
Counting is bidirectional and achieved by drawing polylines with triangular markers
pointing inwards, indicating counting direction.
Higher counting accuracy can only be gained if people are already being tracked approxi-
mately 30 to 50 cm before reaching the counting line.
It is also possible to count people using a digital input, e. g. with an infrared detector. In
this mode the device counts the input signals from an external sensor. No counting line is
displayed in the camera view.
3.2.1.2
Re-entry and re-exit detection
In many cases you do not want to count persons crossing a counting line if they turn
around within the monitored area and cross the counting line again.
An example for such a situation would be a floor which can be accessed by two escalators.
People who come from an escalator and go to the next one should not be counted
(Fig. 18 /A), but people who leave the escalator on that floor (Fig. 18 /B) should be.
