Operation Manual

54 en | IVA 4.0 Flow IVA 4.0
DOC | 4.0 | 2009.06 Operating Manual Bosch Security Systems
– 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.
– 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.
5.4.3 Flow in field
This task generates an alarm event if a flow (overall movement) is detected within a certain
area. The area is defined by a field in the camera image.
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
flow is detected within the field for at least the specified period.
Final Step - Define the Flow
Here you can precisely limit the properties of a flow that triggers an alarm event. Flows that
do not correspond to the properties specified here do not trigger an alarm event.
Direction 1 [°] / Direction 2 [°]
Only flows moving in a certain direction generate an alarm event. The direction is determined
by entering an angle.
0° corresponds to the direction of movement from right to left.
It is counted counter-clockwise.
Another direction can be optionally entered. In this way, movements are captured in two
directions.
You can change the values by
– entering the figures in the fields
– moving the yellow circle segment while holding down the mouse button in order to
redefine the direction of movement
or
– placing the mouse cursor over one of the edges of the circle segment and moving it while
holding down the mouse button in order to change the direction tolerance.
Activity [%]
In this context, an activity is the percentage of the monitored area in which a flow is detected.