Operation Manual

34 en | IVA 4.0 IVA 4.0
DOC | 4.0 | 2009.06 Operating Manual Bosch Security Systems
Next Step - Define the Conditions
You limit the number of objects that trigger an alarm event by precisely defining properties
such as size, aspect ratio, speed and direction.
These settings are described here: Section Next Step - Define the Conditions, page 25.
Next Step - Define the Color
You limit the number of objects that trigger an alarm event by defining the color properties
more precisely.
These settings are described here: Section Next Step - Define the Color, page 28.
Final Step - Define the Head Detection Conditions
In this step, you define whether an alarm should be triggered according to whether or not
detected objects have a head. This enables you to set the surveillance to focus on people or
exclude them completely.
These settings are described here: Section Final Step - Define the Head Detection Conditions,
page 29.
4.5.7 Tampering
This task generates an alarm event if it must be assumed that the video source (camera) has
been tampered with.
Here, you can only activate the filter for the relevant events. You cannot alter the settings for
tamper detection. Only the settings from the standard configuration page apply.
An alarm event is generated if one of the activated events occurs (logical connective = OR).
– Global change
Activate this function if the global change, as set with the Global change slide control on
the standard configuration page, 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.
– Signal loss
Activate this function if the interruption of the video signal should trigger an alarm.
– Reference check
Activate this function if a deviation from the reference image on the standard
configuration page should trigger an alarm.