Bosch AutoDome Junior HD VJR Series, Руководство по эксплуатации

Страница: 89 / 114

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.
This option allows you to detect, independently of motion alarms, manipulation of the
orientation or location of a camera resulting from turning the camera mount bracket, for
instance.
Global change
Activate this function if the global change, as set with the Global change slide control, should
trigger an alarm.
Scene too bright
Activate this function if tampering associated with exposure to extreme light (for instance,
shining a flashlight directly on the lens) should trigger an alarm. The average brightness of the
scene provides a basis for recognition.
Scene too dark
Activate this function if tampering associated with covering the lens (for instance, by spraying
paint on it) should trigger an alarm. The average brightness of the scene provides a basis for
recognition.
Scene too noisy
Activate this function if tampering associated with EMC interference (noisy scene as the result
of a strong interference signal in the vicinity of the video lines), as an example, should trigger
an alarm.
Select Area
You can select the image areas in the reference image that are to be monitored. The video
image is subdivided into 858 square fields. Each of these fields can be activated or
deactivated individually.
Notice!
Select only those areas for reference monitoring in which no movement takes place and that
are always evenly lit, as false alarms could otherwise be triggered.
1. Click Select Area to configure the sensor fields. A new window will open.
2. If necessary, click Clear All first to clear the current selection (fields marked yellow).
3. Left-click the fields to be activated. Activated fields are marked yellow.
4. If necessary, click Select All to select the entire video frame for monitoring.
5. Right-click any fields you wish to deactivate.
6. Click OK to save the configuration.
AutoDome Junior HD Series Configuring the AutoDome Junior HD | en 89
Bosch Security Systems, Inc. Operation Manual 2014.11 | 6.1 | F.01U.275.803