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

CIP A 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey
174
The software developed by the authors allows to project the
solid image onto two new images forming a stereoscopic
pair.
The interior orientation parameters of the two new images are
the same as the original image while the external orientation
parameters are slightly varied in order to realise a “normal
taking”, with the base imposed by the operator and the axes
of the virtual cameras perpendicular to this base and parallel
to each other (see Table 2).
left image right image
X 0 [m]
99.782 100.182
Y 0 [m]
100.699
Z 0 [m]
103.220
cofgon]
1.018592
3.437747
Kfeon]
-0.19099
Table 2 - External orientation parameters of the two images
The obtained stereo pair is show in figure 12.
After having projected the solid image onto each of the two
new images, it is possible to notice that some pixels of the
image do not own a radiometric value.
b)
Figure 12. The artificial stereo pair
a) left image b) right image.
This is due to the fact that the new images are obtained by a
re-sampling process and therefore they need an interpolation
phase to give a complete result. Another type of lack of
information in some pixels could be due to perspective
reasons: changing the projection centre, some areas hidden in
the original image become geometrically visible, but there is
no information available in these pixels.
In this case the holes must be represented as they are (for ex.
in white), because an interpolation process would be
meaningless.
6. CONCLUSIONS
Solid images open the road to a series of new products in the
field of architectural and land surveying applications. A solid
image makes possible:
- to determine in real time the position of any point
in a 3D reference system, using a common PC;
- to carry out three-dimensional correct measures
(lines, areas, volumes, angles, ...), just selecting
some points on the image;
- to allow even unskilled users to easily plot profiles,
sections, plans, by using simple drawing functions
able to manage the solid image structure;
- in general, to integrate the high quality original
colour image with the 3D geometry of every point
represented in the photo.
The first recent applications concern the development of a
software package for the creation of the solid image, its
artificial stereo pair and its use as a 3D model.
A wide series of further practical applications can be
foreseen.
REFERENCES
• P. Boccardo G. Comoglio. New methodologies for
architectural photogrammetric survey
International Archives of Photogrammetry and
Remote Sensing, Voi. XXXIII, Part. B5/1
• L. Bomaz, A. Lingua, F. Rinaudo. A new software
for the automatic registration of 3D digital
models acquired using laser scanner devices -
ISPRS Symposium Commission V- Corfu Greece
September 2002
• L. Bomaz, A. Lingua, F. Rinaudo. High resolution
digital image orientation using laser scanner
data - ISPRS Commission - Corfou September
2002
• S. Dequal. Un concetto innovativo: Yimmagine
solida - Bollettino SIFET - (accepted for printing
2003
• L. Bomaz, S.Dequal. The solid image: A new
concept and its applications - ISPRS Commission
V, WGV/4 - Ancona 01-03 July 2003
• Krauss Fotogrammetria, voi. 1, Levrotto e Bella
Torino
ACKNOWLEDGEMENTS
The idea of the “solid image” has been presented for the first
time, as a “last minute poster”, at the CIP A Annual Meeting -
ISPRS Comm. V in Corfu, Greece September 2002.
The first results and applications have been shown and
described at the ISPRS com. V meeting in Ancona, Italy, 01-
03 July 2003.
The research has been part of the activity financed by the
Italian Ministry For Education and University (MIUR) and
concerning the project: “Metodologie digitali di rilevamento,
GIS e reti multimediali per i beni architettonici e
ambientali”, national responsible Prof. Carlo Monti - DIIAR
- Politecnico of Milan.