Bosch VIP X1 Installation And Operating Manual page 76

EN | 76
Tamper detection
You can reveal the 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.
Note
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.
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 environ-
mental 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 (sec):
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 trig-
gered 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.
Scene too dark
Activate this function if tampering associated with covering the objective
(for instance, by spraying paint on it) should trigger an alarm. The average
brightness of the scene provides a basis for recognition.
Configuration using a Web browser
Installation and Operating Manual | VIP X1
Bosch Security Systems | 2006-12 | V2.5