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DIGIOP® 3D Camera User Manual
SECTION 6: CONFIGURING QUEUING APPLICATIONS
6.1.8 About the Queue Wait Time Metric
The queue wait time metric returns the length of time between the time a person enter the queue count area and the time they
cross the pink line on the queue count area. Note that not all tracks that enter the queue, even those included in the queue length
metric, will have a queue wait time. For a track to have a queue wait time, it must:
•
Pass all counting constraints (minimum height, maximum height, and cart filter).
•
Start outside of the queue count area or within the tail zone.
•
Be tracked continuously through the queue.
•
Cross the pink queue exit line on the queue count area.
If a track meets all of these conditions, its wait time is sent in a metric packet at the aggregation level you selected in the Data
Delivery tab. Otherwise, the wait time is discarded. The following drawings show how the D3D-2500 handles various queue wait
time scenarios:
Queue wait time examples
In the following diagrams, the circles represent the Track Distance area.
In the representation above, the individual has a valid wait time because the
track started outside of the count area. If the Debug check box is selected on
the Queue page, the person has a track ID, and wait time displayed next to
them. When the track crosses the pink line, the wait time is finalized and sent
in a metric packet. Then the track ID and wait time change to a green dot.
Although all tracks are within the track distance threshold, there is no one in
the queue head, meaning that the queue is closed and all tracks within the
queue count area are ignored. If the Debug check box is selected, the display
will not show any indicator for these tracks.
