3.3 Re-entry and re-exit detection ('Repassing' / 'U-turns')
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.
A
A
1
2
A
A
B
Fig. 10: Example
1
Floor area
2
Counting line
An example for such a situation would be someone who goes out
to make place for other people. People who goes out and re-entry
should not be counted (A), but people who leave (B) should be.
There are three modes for counting persons who turn around in the
monitored floor area:
n
No delay
Counts every time a person crosses the counting line, without
suppressing U-turns (immediate result after crossing the
counting line).
n
Infinity
Count only once if no U-turn was made (result delayed until
person leaves the floor area).
n
Time period (e.g. 10 sec)
Count if the person stay longer than the time period and
without an U-turn in this time (result delayed until time period is
over or until person leaves floor area before end of time
period).
These modes can be defined separately for each counting line and
each direction of them.
Structure and function
Re-entry and re-exit detection ('Repassing' / 'U-turns')
16
09.06.2017
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