Table 5-7 Description of IVS functions
Rule
Description
Applicable Scene
Tripwire
When the target crosses
the virtual tripwire from
the defined motion
direction, the IPC will
trigger an event.
Scenes with sparse targets and no
occlusion among targets.
Intrusion
When the target enters,
leaves, or appears in the
detection area, IPC will
trigger an event
Abandoned object
When
an
(non-human)
object is left abandoned
in the detection area over
a set time,
IPC will
trigger an event.
Scenes with sparse targets and
without obvious and frequent light
change. A simple scene in the
detection area is recommended.
●
Missed alarms may increase
in scenes with dense
targets, frequent occlusion,
and people staying.
●
In scenes with complex
foreground and background,
false alerts may be triggered
for abandoned or missing
object.
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