EN
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Bosch Security Systems | 2006-05 | V2.0
Dinion IP
| Installation Manual
the movement of the camera itself causes changes in the video image that
are too big.
Global change %
You can define the percentage of sensor fields that must register a change
simultaneously before generating an alarm. This setting is independent of the
sensor fields selected under Select area.
This option allows you to detect, independently of motion alarms, manipulation
of the orientation or location of a camera resulting from turning the camera
mounting bracket, for instance.
Sensitivity
Note
This and the following parameter are only accessible if the reference check
is activated.
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
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.
Scene too bright
Activate this function if tampering associated with exposure to extreme light (for
instance, shining a flashlight directly on the objective) should trigger an alarm.
The average brightness of the scene provides a basis for recognition.
