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3.1.2
Person position / coordinate mode
The PC-Series sensor uses one specific position per person to evaluate the counting on lines
and zones. This position is either located at the head of a person or at its feet. Figure 5
illustrates the two possible positions.
Figure 5: Person position
Due to the visual perspective of the overhead mounted sensor, the head and foot positions
are congruent directly underneath (in the plump) of the sensor but at different positions at
the scene borders. The user can choose which position shall be used on the sensor by
defining the coordinate mode. This coordinate mode, which can either be “foot” or “head”,
then defines where to show the tracking of a person.
The displaying of the person tracks (paths) on the other hand influences the definition of the
counting elements: When choosing foot coordinates, the person paths will first be displayed
after an offset from the border, as persons get detected by the sensor first, when their head
is seen by the sensor. And, due to the visual perspective, the feet of a person will be seen by
the sensor long before the head of the same person is seen. Or, in other words, when a
persons head is seen by the sensor, its feet will be located within the sceen with a certain
distance to the border / to the head of the person. The following situation demonstrates this
fact:
Figure 6: Different tracking areas depending on the coordinate mode
Summary of Contents for PC Series
Page 1: ...PC Series User manual...
