Optical methods in the area of 3d measurement for test
engineering become more and more important in the
industrial production process. The performance of test
engineering systems is characterized with velocity, ac-
curacy and sufficiency. Because the application should
work also very adaptable on extensive workpieces we
use as an additional technical basis industrial robots.
Generally, robot based 3d measurement systems are
known and already used in industrial applications. But
they are normally based on standard methods like phase
shifting or laser scanning. However, this signifies a so
called stop-and-go system being awkward in case of ex-
tensive workpieces. On each stop the robot needs some
time to die.

To avoid stop-and-go systems we aim a continuous 3d-
scanning method based on line cameras and special il-
luminations. Line cameras distinguish themselves by
high resolution and fast data acquisition. Both prop-
erties are essential requirements for high velocity and
high accuracy. However, the high line frequency and the
short exposure time allow an image acquisition during
the movement of the robot. So the developed methods
are suitable for continuous scanning processes getting a
high resolution 3d surface reconstruction.
The 3d surface reconstruction is the essential basis for
test engineering. We develop new algorithms to find
surface defects like dents, dints, pimples and scratches.
Here we also aim continuous methods getting results
in real time with short delays. Due to high resolution
and high line frequency the measurement data volume
is tremendous. So, we have to implement our developed
methods on parallel hardware like FPGAs and GPUs.

(Contact: Prof. Al-Hamadi)