Operation Manual

26 en | IVA 4.0 IVA 4.0
DOC | 4.0 | 2009.06 Operating Manual Bosch Security Systems
Object size [m²]
Only objects whose size (the area covered) corresponds to the entered values generate an
alarm event.
X Enter a minimum and a maximum value for the size.
Aspect ratio v/h
Objects whose aspect ratio corresponds to the entered values generate an alarm event.
The minimum and maximum ratios are graphically displayed in the camera image as two
yellow rectangles. By default, values are set with which all objects trigger an alarm event.
You can change the values by
– entering the figures in the fields
or
– highlighting a rectangle in the camera image and dragging it to a node while holding
down the mouse button.
The ratio is the quotient of the vertical and horizontal extension of the object in the image
captured by the camera. The actual aspect ratio can deviate from this.
Persons captured directly from above always have the same aspect ratio in the image,
irrespective of their actual size.
The aspect ratio of a person changes if the person falls down or stands up, for example. The
aspect ratio of a vehicle changes if it changes its direction by 90°.
1 Visualization of the property
In this example, the visualization of the aspect ratio is displayed.
2 Marked object
The marked object whose properties are described is marked with a yellow flag.
3 Property activated
In this example, the Aspect ratio v/h property is used to describe an object.
NOTICE!
You can switch to the Object Properties tab at any time (see: Section 4.8 Object Properties,
page 47). There you will find information on how the properties of the marked object change.