3 D D R I V E R A S S I S TA N C E S Y S T E M | 3 V I S T O R - P
8018167 / 2015-03-31 | S I C K A G
Subject to change without notice
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PRODUCT DESCRIPTION
3.4
Display elements
There is a 7" display unit.
The display must be mounted in the driver's cab so that the driver has the best possible
view of the scene captured by the sensor head.
It provides a real-time image of the scene, information about the defined alarm area,
and the position of the sensor head on the vehicle.
If objects enter the alarm area, their presence is indicated optically on the display and
is also signaled acoustically via the integrated speaker.
The system is configured with the help of the display.
3.5
Functional principle
The driver assistance system relies on the stereoscopic principle. This principle of
operation involves capturing two images of a scene from different angles and superim-
posing them on one another.
The superimposed images are used to create a three-dimensional picture of the scene
by applying suitable algorithms (similar to the mechanism that enables humans to see
in 3D).
Once the raw image data has been converted into a 3D scene, any objects present
within the detection area can be assigned a 3D location, which is then compared with
the configured alarm areas.
If there is an object present in either of the configured alarm areas, an alarm is trig
-
gered via the display in the driver's cab and the driver can respond accordingly.
3.5.1
Stereoscopy
Stereoscopy is based on the natural principle of human sight, whereby two eyes (or
sensors) – which are spaced apart – are directed toward the same scene.
3.5.2
Principle of operation
Stereoscopy involves using a processing unit to reconcile the images from two visual
fields. In humans, each eye is responsible for one of the visual fields and the brain rec
-
onciles the two images to create one stereoscopic image. Due to the (slightly) different
visual angles of the two visual fields that are aimed at the same scene, an impression
of depth is created. As a result, humans are able to determine three-dimensional dis-
tances.
This principle can be replicated using technology and, in the case of the driver assis-
tance system, used to determine distances. In this context, it is the sensor head that
provides the two images required. These are then reconciled by the evaluation unit to
create one stereoscopic image. This involves assigning 3D data to the scene so that it
can be checked against a virtual three-dimensional zone (alarm zone).
