PID
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9.1.4.3
Shapes
To establish the exact dimensions and position of the area(s) to be monitored for events, you
overlay shapes over the preview.
Shapes come in three categories.
trigger shape
ignore shape
helper shape
Trigger shapes are used to define the area where objects can trigger an event. Ignore shapes do
the opposite. They suppress the triggering of events. Helper shapes are used to provide a visual
(graphical) input for object size.
The following overlays are available.
Detection zone (trigger)
Detection line (trigger
Ignore line (ignore)
Perspective (helper)
Minimum object size filter (helper)
Detection zone
A detection zone shape is initially drawn as a box, but nodes can be added to allow for more
complex shapes. Trigger conditions can be set through the context menu of the zone.
Detection zone shape
Detection line
A detection line is a single line between two points which triggers when an object crosses it. Extra
nodes can be added to provide a more flexible line. Trigger conditions can be set through the
context menu of the line.
