Ottoburg

The building is a medieval living tower of the 15th century in downtown Innsbruck which is of very high historical value and has been used as a restaurant for the last centuries. It has a very complex structure and typically, no part has a simple or regular surface. For practical reasons, two different cameras were used for data acquisition. A Hasselblad SWC (super wide-angle) medium format camera was used for a basic bundle arrangement around the building (conformable to the 3x3 rules). To get the roof area, additional photos with a small format camera were taken from neighbouring house roofs . In addition, close shots (e.g. around the entrance area) were taken to increase the density of points and the level of details and image resolution for projection. Because the building stands on one side close to the river, it was necessary to add narrow angle photos from the opposite bank of the river to image building parts hidden in the photos taken so far.

  See samples of these photos.

The 6 x 6 cm Hasselblad images were scanned using a desktop scanner, whereas the 35 mm photos were digitised via Photo-CD. In total, 25 photos were used and about 1450 3D-points and 2700 surface elements were measured. 15 images have been used for digital projection to the surface model.

The photomodel is also the data storage concept. Further results can be derived from this model, e.g. by parallel or perspective mapping to an arbitrary viewing plane.

  A set of reduced orthoimages (facade maps) of 3 facades of Ottoburg (original scale 1:100).

  The high level of details in this 3D-model is illustrated in the entrance area of the building.

Even fly-arounds can be derived easily.