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share exactly one common edge. An object crossing this
edge must appear in each zone for at least 0.5 seconds to be
detected6. To satisfy the 0.5 second requirement, the size
and shape of each zone should be large enough to
accommodate the size and velocity of all targeted objects.
-Zone 1: User defined polygon with a maximum of 16 nodes.
Each node defined by fixed-point coordinate pair lying within
image boundaries. Must be defined before Zone 2. The first
and last nodes should be identical.
-Zone 2: User defined polygon with a maximum of 16 nodes.
Each node defined by fixed-point coordinate pair lying within
image boundaries. Must be defined after Zone 1. The first and
last nodes should be identical.
-Directionality:
Zone 1 to Zone 2: Event detected only if object moves from
zone 1 to zone 2.
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