DMS 80 / DMS 160 / DMS 240 / DMS 240 HSR
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69
If required the current reference data can be discard with Forget. The image analysis starts
automatically and generates new reference data.
SEDOR
®
Sabotage
The SEDOR
®
Sabotage module detects the manipulation of a camera by e. g defocusing,
repositioning or covering. A sabotage event can trigger a system message, sending of a
message to an alarm host or switching of a relay.
Note that...
... the function is not suitable for dome / PTZ cameras.
... the camera has to be mounted vibration-free.
.... new reference data will be generated after every event.
.... displaying and sending of a message has to be activated separately.
.... alternating ambient conditions (brightness, precipitation) can cause false messages.
Fig. 6-50 : SEDOR
®
sabotage configuration
¾
Select the
Sabotage
tab if required.
¾
Observe the explanations given below.
¾
Set the
Limit
for the acceptable deviance.
¾
Set the
Minimum learning phase
.
¾
Set the
Minimum alarm delay
.
¾
Finally confirm with
Close
.
Limit
The
Limit
is the acceptable deviance between current image and reference data.
If the
Limit
is set very low, a minor deviance is enough to trigger a message. In this case
slight defocusing of the camera can be detected. But minor deviances often are caused by
alternating ambient conditions (passerby, brightness, precipitation). Many false messages
have to be anticipated.
If the
Limit
is set very high, the current image may differ very much from the reference
data. Only almost total repositioning or covering of the camera will be rated as a sabotage
event. But only few false messages can be anticipated.
