SKYROS Corporation VideoNet 8.4 User guide
78
11.If the system detects left objects correctly, release
Test
button to complete
setup.
After you have configured and saved
left objects detection
parameters, the system
will gather information, necessary for work of the detector – will remember
non-
alarm
state in the guarded zone,
which will be considered to be
sample
state. It takes several
seconds to save a
sample
state (for switchable cameras it takes a little more –
upto 10 seconds).
During detector working the
current
state in the guarded zone will be compared
with the
sample
state according to configured detection parameters. If the difference
between states exceeds allowable variation limit (determined by detection
parameters), then the system will state
alarm
by camera-detector.
It is important to understand that, if some state change occurred in the guarded
zone (for example, a chair or any other object appears), and the system considered
this state change to be
non-alarm
, then the
sample
state of the zone will be
automatically renewed.
The same will happen after expiration of the
alarm
reset
time
by camera-detector.
For example, if some valuables will be stolen in guarded zone, the system will
establish the fact of objects disappearance and will inform about the
alarm
on the
guarded territory until
reset
time
is elapsed. After that the informing about alarm
situation will be stopped and zone
sample
state will be renewed. In this new state
there will be no stolen valuables.
Attention!
If alarm object occupies more than 80% of detection zone, then
camera-detector won’t state
alarm object
. This enables to avoid false alarm,
when an object, size of which exceeds 80% of the detection zone, appears
in this detection zone. For example, a bird, flew in front of camera lens, or
sudden outage, etc. In this connection it is strongly recommended at detection
zones configuring to take into account sizes of guarded objects or those
objects, appearance of which is possible in this zone.
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