Bosch ltc-0335-28 Installation Instruction

Bosch Video Management System

 Encoders / Decoders page | en

Bosch Sicherheitssysteme GmbH

Configuration Manual

Configuration Client | V3 | 2010.07

trigger an alarm. Set a low value if changes that occur simultaneously in a large number of 

areas should lead to trigger an alarm. This setting allows you to detect, independently of 

motion alarms, manipulation of the orientation or location of a camera resulting from turning 

the camera mount bracket.

This setting is independent of the areas selected in the Select Area window (see 

Section 18.8.2 Select Area diaog box, page 118).

Select the check box if covering the objective (for instance, by spraying paint on the 

objective) should trigger an alarm. The average brightness of the scene provides a basis for 

recognition.

Select the check box if EMC interferences (noisy scene as the result of a strong interference 

signal) should trigger an alarm.

Allows you to compare the current video image with the reference image that is stored.

If the current video image differs from the reference image in the marked areas, an alarm is 

triggered. This function detects tampering that would otherwise not be detected, for example 

if the camera is turned.

Select the check box to activate the reference check.

Click to configure the areas for tamper detection. The Select Area dialog box is displayed (see 

Section 18.8.2 Select Area diaog box, page 118).

Click to save the currently visible video image as reference image.

Move the slider to set the basic sensitivity of the tamper detector. The tamper detector 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.

Sensitivity can only be changed if Reference check is enabled.

Enter the time for delayed alarm triggering. The alarm is only triggered if the triggering 

condition still exists after this time. if the triggering condition does not exist after this time, 

the alarm is not triggered. The delay avoids false alarms triggered by short-term changes, for 

example, cleaning activities in the direct field of vision of the camera.

Trigger delay (s) can only be changed if Reference check is enabled.

Select an item from the list to specify the reference check.

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.