- 130 -
Figure 5. Left: Shaded view of the sculptured model. Right: Combined with vector features.
With the full set of functionalities, many different visualizations
can be performed. A simple one is to assign a texture to the
sculpture that is similar to the current or supposed original
appearance of the sculpture and show it from different
directions. Video sequences, e.g. rotating the camera position
around the sculpture, can easily be generated in this way. Such
an animation assists the observer in achieving a good 3D
impression of the object.
The vector data can be emphasized when combined with the
surface model. By assigning semi-transparency to the model’s
surface, the position of seams and rivets can be viewed in 3D
even though these features are not visible in reality (fig 5).
Additionally, parts of the sculptures that have vanished in the
past can be reconstructed digitally and switched on and off for
viewing. Thus, the most probable original impression of the
sculpture can be generated without changing the real sculpture
itself. The crown and the loincloth of the sculpture were created
using photos of comparable objects from other sculptures.
MEASUREMENTS
Using the model of the sculpture, measurements can be
performed that are not possible with the sculpture itself. Using
rather simple software tools, point coordinates or distances
between points can be measured as 3D distances or differences
parallel to selected coordinate axes. Points without direct
connection in between can be used easily.
Thus, measurements can now be done without the need to use
the real sculpture itself with sufficient accuracy. This will be an
advantage when the sculpture will be in the exhibition of the
museum again, or not accessible at all to scientists interested in
further investigations.
CONCLUSIONS
The used approach for the geometric documentation of the
statue of Pepi combines the prospects of the two methods used.
The documentation of the seams and rivets with close range
photogrammetry represents established standard technologies.
The digital surface model of the sculpture generated from laser
scanner points allows measurements on the one hand and is
suitable for various kinds of visualizations, in addition. The
digital reconstruction of perished parts as well as animations
can be made using these data.
The accuracy of the digital model is not sufficient for an exact
reconstruction of the sculpture, which was not an objective of