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Tracking area:
Tracking area means scope of tracking teacher. When the tracking target goes
out of the tracking area, it will be considered tracking target losing. The tracking area can be
set into polygon according to certain environment conditions, or set student area outside of
tracking area. See Figure 5.2-4:
Mask area:
Mask area is usually the area which may impact result of teacher tracking, such
as places which may have dynamic changes such as TV, projector, doors and windows. See
Figure 5.2-5:
