Abstract
A new mobile optical 3D measurement system using phase correlation based fringe projection technique will be
presented. The sensor consist of a digital projection unit and two cameras in a stereo arrangement, whereby both
are battery powered. The data transfer to a base station will be done via WLAN. This gives the possibility to
use the system in complicate, remote measurement situations, which are typical in archaeology and architecture.
In the measurement procedure the sensor will be hand-held by the user, illuminating the object with a sequence
of less than 10 fringe patterns, within a time below 200 ms. This short sequence duration was achieved by a new
approach, which combines the epipolar constraint with robust phase correlation utilizing a pre-calibrated sensor
head, containing two cameras and a digital fringe projector.
Furthermore, the system can be utilized to acquire the all around shape of objects by using the phasogrammetric
approach with virtual land marks introduced by the authors1, 2. This way no matching procedures or
markers are necessary for the registration of multiple views, which makes the system very flexible in accomplishing
different measurement tasks. The realized measurement field is approx. 100 mm up to 400 mm in diameter.
The mobile character makes the measurement system useful for a wide range of applications in arts, architecture,
archaeology and criminology, which will be shown in the paper.
