Bosch VCD Series, Руководство по установке

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HD Conference Dome Configuring the HD Conference Dome | en 129
Bosch Security Systems, Inc. Installation Manual F.01U.265.806 | 1.0 | 2012.03
Sensitivity
The basic sensitivity of the tamper detection can be adjusted
for the environmental conditions to which the camera is
subject.
The algorithm reacts to the differences between the reference
image and the current video image. The darker the observation
area, the higher the value that must be selected.
Trigger delay (s)
You can set delayed alarm triggering. The alarm is only triggered
after a set time interval in seconds has elapsed and then only if
the triggering condition still exists. If the original condition has
been restored before this time interval elapses, the alarm is not
triggered. This allows you to avoid false alarms triggered by
short-term changes, for example cleaning activities in the direct
field of vision of the camera.
Global change
You can set how large the global change in the video image
must be for an alarm to be triggered. This setting is
independent of the sensor fields selected under Select Area .
Set a high value if fewer sensor fields need to change to trigger
an alarm. With a low value, it is necessary for changes to occur
simultaneously in a large number of sensor fields to trigger an
alarm.
NOTICE!
The options for tamper detection can only be set for fixed
cameras. Dome cameras or other motorized cameras cannot be
protected in this manner as the movement of the camera itself
causes changes in the video image that are too great.
NOTICE!
This and the following parameter are only accessible if the
reference check is activated.