Bosch AUTODOME IP starlight 5000i IR, Руководство пользователя

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50 en | Alarm AUTODOME IP starlight 5000i IR
2019.11 | 1.2 | User 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.
Reference check
Save a reference image that can be continuously compared with the current video image. If
the current video image in the marked areas differs from the reference image, an alarm is
triggered. This detects tampering that would otherwise not be detected, for example, if the
camera is turned.
1.
Click Reference to save the currently visible video image as a reference.
2. Click Add mask and select the areas in the reference image that are to be ignored. Click
Set to apply.
3. Check the box Reference check to activate the on-going check. The stored reference
image is displayed in black and white below the current video image.
4. Select the Disappearing edges or Appearing edges option to specify the reference check
once again.
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.
Disappearing edges
The area selected in the reference image should contain a prominent structure. If this
structure is concealed or moved, the reference check triggers an alarm. If the selected area is
too homogenous, so that concealing and moving the structure would not trigger an alarm,
then an alarm is triggered immediately to indicate the inadequate reference image.
Appearing edges
Select this option if the selected area of the reference image includes a largely homogenous
surface. If structures appear in this area, then an alarm is triggered.
Global change
Activate this function if the global change, as set with the Global change slide control, should
trigger an alarm.
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
Mask... . 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.