Manual

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, and the selected
areas are marked in yellow.
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.
70
en | Setting up VCA
Camera Browser
Interface
2015.06 | v1.610 | AM18-Q0691 Bosch Security Systems