×

You are using an outdated browser that does not fully support the intranda viewer.
As a result, some pages may not be displayed correctly.

We recommend you use one of the following browsers:

Full text

Title
New perspectives to save cultural heritage
Author
Altan, M. Orhan

CI PA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey
9. EXPERIMENTAL RESULTS: MERGING SEVERAL
APPROACH IN THE SAME TOOL
9.1 Combination of methodology
The Etruscan amphora was surveyed with Laser scanner and
photogrammetric tolls. Textured meshes of the object were
produced using: i) Reconstructor Software for LFR data and
digital photos, ii) Arpenteur and ROMA Software for
photogrammetric photos.
A theoretical model was produced by means of few real
measures derived from real surveyed object.
The final step of merging the different approaches in the same
tool was provided trough Surveyor Software (by Joint Research
Centre nEuropean Commission n JRC, EU). This tool allows
importing wrml models, combining and comparing them,
extracting linear-areas measurements, cross sections and
orthographic view [Sgrenzaroli, Wolfart 2002].
An experimental test was set up in order to emphasise the
potentiality of the combination between LFR and
photogrammetry. An artificial hole was created in the laser
range mesh using the Reconstructor mesh editor. The mesh
derived from photos 7R, 7C, and 7R (see figure 3) using
Arpenteur-ROMA tools was used to close the artificial hole.
9.2 Visualization and Interaction
The Surveyor Software provide different tool for managing the
combined model: i) wrml models import and export, ii) model
comparison, iii) linear-areas measurements extraction, iv) cross-
sections and orthographic view creation. Examples of these
tools used for the amphora test are show in figure 7. The
photogrammetric model of the seabed surface where the
Etruscan wreck was found combined with the LFR amphora
model is also visualized.
10. CONCLUSION
The first steps of a common work towards building a survey
tool that integrates the LFR technology and close range
photogrammetry based on knowledge closer to the measured
object has been presented in this article. The result is a textured
mesh coming from a laser scanner software, a mesh coming
from automatic photogrammetry using a geometrical
approximation of the object and image correlation for the part of
the object invisible by the scanner and a simple mesh for the
lacked part of the measured object coming from a theoretical
description. We are currently working on different aspect of this
problem: i) the different data source integration in the
Reconstructor Software, ii) the usage of automatic
photogrammetric measurement beyond an approximation of the
object geometry and image processing techniques, points of
interest (as for example Harrisi points), iii) the geometrical
formalization of the ideal model of the objects.
Fig. 6. On the left: Synoptic view of method combination; on the left laser range and programmatic photo, the mesh derived from
photogrammetry in the central icon, and on the right the artificial hole in the laser- derived mesh close through the mesh derived from
photogrammetry
11. REFERENCES
[BarcelLJ 2000| Juan A. BarcelU Visualizing what might be.
An introduction to virtual reality techniques in archaeology.
VIRTUAL REALITY IN ARCHAEOLOGY, Edited by Juan
A. BarcelU Donald Sanders, Maurizio Forte. Published by
ArchEbpress PO Box 920 Oxforf OX27YH, 2000.
[Besl, McKay, 1992] Besl, P. J. and McKay, N. D., 1992. A
method for registration of3-D shapes. IEEE Trans. Pattern
Analysis and Machine Intelligence, 14(2): 239-256, 1999
[Drap, Seinturier, Long, 2003] Pierre Drap, Julien
Seinturier, Luc Long, A photogrammetric process driven by
an Expert System: A new approach for underwater
archaeological surveying applied to the ¿Grand Ribaud FI
Etruscan wreck, ACVA'03, Applications of Computer Vision
in Archaeology, Madison, Wisconsin, USA, June 17, 2003.
[Drap, Grussenmeyer, Gaillard, 2001] Pierre Drap, Pierre
Grussenmeyer, Gilles Gaillard. Simple photogrammetric
methods with arpenteur. 3-d plotting and orthoimage
generation : the I-MAGE process. CIPA 2001 International
Symposium, Potsdam University (Germany) September 18 -
21, 2001. The ISPRS International Archives of
Photogrammetry, Remote Sensing and Spatial Information
Sciences, Volume XXXIV n 5/C7, ISSN 1682-1750, p. 47,
54.
[Paulo et al, 2003] D. Paulo, S. Sequeira and F.Vaz , 2003,
Registration and Fusion of Intensity and Range Data for 3D
Modelling of Real World Scenes, 3Dim (to be published)
[Py M. et F., 1974] Py F. et Py M. Les amphores Etrusques
de Vaunage et de Villevielle (Gard), in : MEFRA 86, 1974, 1.
[Sequieira et al., 1999] V. Sequeira, K. Ng, E. Wolfart,
J.G.M. GonÀlves, D. Hogg, 1999./'Automated
Reconstruction of 3D Models from Real Environments",
ISPRS Journal of Photogrammetry and Remote Sensing
(Elsevier), vol. 54, pp. 1-22.
[Sgrenzaroli, Wolfart 2002] M. Sgrenzaroli, E. Wolfart
2002, Accurate texture-mapped 3D models for
documentation, surveying and presentation purposes, CIPA-
Corfu 2002
[Sourisseau, 1997] Sourisseau J.-Chr. Recherches sur les
amphores de Provence et de la Basse VallÈe du Rhlhe aux
Epoques archaQue et Classique (fin VIIË-dÈbut IVËs. av. J.-
C.), thËse de doctorat, Aix-en-Provence, 1997
[Tsai, 1987) Tsai, R.Y.,A versatile camera calibration
technique for high-accuracy 3D machine vision metrology
using off-theshelf TV cameras and lenses. IEEE J. Robotics
and Automation, 3(4): 323-344, 1987