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86 en | Advanced Mode DinionHD 720p IP Camera
AR18-10-B013 | v1.52 | 2011.06 Installation and Operation Manual Bosch Security Systems
Tamper detection
Detect tampering of cameras and video cables by means of
various options. Run a series of tests at different times of the
day and night to ensure that the video sensor is operating as
intended.
Sensitivity and Trigger delay [s] can only be changed if
Reference check is selected.
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]
Set delayed alarm triggering here. 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 avoids false alarms triggered by short-term
changes, for example, cleaning activities in the direct field of
vision of the camera.
Global change (slider)
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. This option
allows detection, independently of motion alarms, manipulation
of the orientation or location of a camera resulting from turning
the camera mount bracket, for example.
Global change
Activate this function if the global change, as set with the
Global change slide control, should trigger an alarm.