Operation Manual

36 en | IVA 4.0 IVA 4.0
DOC | 4.0 | 2009.06 Operating Manual Bosch Security Systems
4.5.10 Entering field
This task generates an alarm event if an object enters an area. The area is highlighted by a
field in the camera image.
The alarm event is triggered if an object that was previously detected outside a field crosses
the field boundary.
First Step - Define the Field
1. Select one of the fields.
To do this, use the list field or click a field in the camera image.
You can also create a new field, edit an existing one or select Whole screen.
2. Debounce time [s]
If a value other than 0 (zero) is selected, the alarm event will not be generated until the
object has moved or been within the field for the specified period at least.
By entering a value, you can prevent the triggering of multiple alarm events by objects
that are constantly moving toward and away from the boundary of the field.
Next Step - Approximation
You can impose approximations for the different object properties. You can adopt these
values as the basis for the settings in the next step.
These settings are described here: Section Next Step - Approximation, page 24.
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.
4.5.11 Leaving field
This task generates an alarm event if an object leaves an area. The area is highlighted by a
field in the camera image.
The alarm event is triggered if an object that was previously detected inside a field crosses
the field boundary.
First Step - Define the Field
1. Select one of the fields.
To do this, use the list field or click a field in the camera image.
You can also create a new field, edit an existing one or select Whole screen.