Operation Manual

42 en | IVA 4.0 IVA 4.0
DOC | 4.0 | 2009.06 Operating Manual Bosch Security Systems
Applying the Calibration
1. Click Apply to save the calibration for this image.
2. Click Cancel to return to the last saved calibration.
Calibrating with Calibration Plane
The calibration is defined by placing a virtual plane on the camera image and adjusting it step-
by-step in relation to the actual situation.
With a VG4 AutoDome, calibration must be completed for each preset.
The settings are graphically displayed on the camera image by the virtual plane and two
cubes.
The virtual plane appears as a blue grid and can be tilted, rotated and scaled. Position the
virtual plane on the camera image so that it matches the angle and perspective of one of the
actual horizontal areas. A section of a street is a suitable reference area, especially if the sides
of the street are marked.
Two red cubes are displayed on the plane. In the default setting, the side length of one of
these cubes is equivalent to 2 m – so the cube is about the same height as a person. The
cubes are shown in the perspective of the blue plane.
You can adjust the position and size of the cubes – so that a cube corresponds to a car, for
example.
1. Position one of the red cubes over an object that you wish to trigger an alarm event.
2. Adjust the cube to the size of this object. The second cube changes its size to suit the
selected perspective.
3. You can place the second cube over another object of the same type, for example a
second person who is further back in the image. This allows you to check whether the
perspective is set correctly.
The more care you take over calibration, the more accurately the size, direction and speed of
moving objects can be estimated.
You can, of course, alter your settings at any time.
The system must be recalibrated each time the camera position is changed.
Adjusting the Calibration Plane
This section provides an overview of the ways in which the calibration plane can be adjusted.
Move the mouse cursor over an anchor point or a line and then perform the required action
while holding down the mouse button.
Start position At the beginning, the calibration plane is
shown upright.
Anchor point center of a side
line of the plane
The calibration plane is scaled.