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3.2 Measurement of an assembly tool
At the Daimler Benz Aerospace Airbus in Hamburg the periodical inspections of assembly tools is done with photogrammetric
methods. In the moment the measurements are done with a RolleiMetric Large Format Camera (LFC) with an image format of
230mm x230mm (Dold, Suilmann 1993). First investigations have been done with the ChipPack (color version in b/w mode). For
the measurement of an assembly tool with an size of 6000 x 3000 x 1000mm? 30 images have been taken. After a bundle adjustment
using free net conditions the RMS values parallel to the image plan are appr. 0.025mm, perpendicular to the image plane 0.07mm.
3.3 Application in the field of architecture photogrammetry
The following example will prove that the Rollei ChipPack can also be successfully used in architecture photogrammetry. The aim
of this investigation was to describe the facade shown in figure 4 with the help of two different evaluation methods. The outline of
the facade was to be determined by a graphic evaluation. Later on, parts of the facade were digitally rectified. The different
processing steps were all carried out by the digital work station PHAUST (Woytowicz 1993).
Fig. 4 : Original image of the facade
For the graphic evaluation, three photographs were taken with a distance of about 10 m between the camera and the object, and basis
of about 6 m. Due to the local surroundings of the object, a better configuration could not be achieved. 30 natural points were
measured in order to determine the orientation parameters. The standard deviation of the measurement of image coordinates was
4 um according to the bundle adjustment (carried out by CAP). The standard deviation of object coordinates was s, = 2,3 cm, Sy =
2,5 cm and s, = 3,5 cm. A higher accurary could not be expected because of the image configuration (see above) and the
measurement of natural points. After defining the triangulation parameters, the object coordinates of the graphic evaluation were
determined by spatial intersection. Figure 5 shows the computer screen with three general images and one original section, each with
the graphic overlay.
Fig. 5: Computer screen with general images and original section
IAPRS, Vol. 30, Part 5W1, ISPRS Intercommission Workshop “From Pixels to Sequences”, Zurich, March 22-24 1995
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