Operation Manual

30 en | IVA 4.0 IVA 4.0
DOC | 4.0 | 2009.06 Operating Manual Bosch Security Systems
Use head detection filter
1. Activate this option if you wish to filter objects based on head detection.
2. Select one of the options:
– Limit to objects where no head has been detected
Alarm events are only triggered for objects on which no head is detected.
– Limit to objects with a largest head width between
Triggers an alarm event for objects on which a head of the specified size has been
detected. The alarm event is generated during the period in which the object is
within the detection area.
To determine the size of the heads, two head outlines representing the minimum and
maximum head size are displayed in the camera image.
The outlines can be repositioned. The positioning of the outlines on the area of the image
does not affect alarm generation.
Adjust the size of the outlines with the mouse or enter numbers between 8 (Min.) and 33
(Max.).
4.5.3 Crossing line
This task generates an alarm event if an object crosses one or more virtual lines.
First Step - Define the Lines
1. Select from the list field one of the lines that have already been created or click a line in
the camera image.
You can now also create a new line or edit an existing one.
2. Select a second and a third line, if necessary.
3. Debounce time [s]
If a value other than 0 (zero) is selected, the alarm event will not be generated until the
object has been on the other side of the line 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 onto and away from the line.
This entry always relates to the line currently highlighted in this dialog box. Where
necessary, this entry must be repeated for each line.
4. Direction
Select for the highlighted line whether the alarm should be triggered if the line is crossed
according to the direction of the arrow in the graphic display (Forward), against this
direction (Backward) or independently of the direction (Any).
The display of the direction is adapted accordingly in the camera image.
Next Step - Define the Trigger
This step is only displayed if at least two lines are used for this task.
Here, you specify whether the corresponding crossings generate an alarm event
independently of one another or whether the lines must be crossed in a pre-defined sequence
and, if necessary, at a defined time interval.
1. Activate the required option.
2. Enter a minimum and a maximum value if an alarm event should only be triggered if the
crossing is within a pre-defined time span.
NOTICE!
The change in the alarm-triggering direction is adopted for all tasks using this line.