ul 2004
oftware,
entation
jection"
eS Were
x a high
ter than
eep the
did not
timated
top).
) define |
nera: 3 |
pjection |
yaw); |
nce and
of the |
affined
nd non-
2 radial |
, and 2
inearity |
ognised |
na, we |
n ina |
ing we |
juently, |
ameters |
set on
1ce and |
e value
allowed
leleting
of the
pective
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B5. Istanbul 2004
?
|
x
i
Fig 7 — Texture mapping of the North side of the Baptistery
As you may notice in figure 7 the final result is a triangulated
solid model with a single mesh coloured by the photo images.
In blue it is possible to see the zone where the model has no
data (these are data holes in the structure due to the shadow
zones).
5. CONCLUSION
The representation of the Baptistery of Cremona gave to the
authors the possibility to check the capacity of these different
survey techniques. In particular we realized two different solid
modulations with the laser scanner and photogrammetric
technique. In both cases, realizing the analytical model of the
Baptistery, we reached high accuracy, about 1.5 cm on the
three coordinates, estimated on some control points surveyed by
the total station.
Certainly the laser scanner survey shows more completeness,
thanks to the point cloud with a spot spacing of some
centimetres, and also to the quickness of acquisition and
processing of the data. The texture mapping, realized by
colouring the surfaces triangulated of the solid model with the
correspondent shades of the oriented digital images, gives a
result matching the extremely accurate analytical solid model
and the truthfulness of the topographical survey.
REFERENCES
References from Journals:
Sansó, F. (1973). *An exact solution of the roto-translation
problem". Photogrammetria, no. 29, pp. 203-216.
Zeng, Z., Wang, X., (1992) *A General Solution of a Closed-
Form Space Resection". PE&RS Vol. 58, no. 3, pp. 327-338.
References from Other Literature:
Bitelli G. (2002) “Moderne tecniche e strumentazioni per il
rilievo dei beni culturali". Relazione invitata in: Atti della 6°
Conferenza Nazionale ASITA *Geomatica per l'ambiente, il
territorio e il patrimonio culturale", vol. I, Perugia, pagg. IX-
XXIV.
Mason S. (1994), “Expert system based design of
photogrammetric networks", PhD thesis, Mitteilungen 53,
Institute of Geodesy and Photogrammetry, ETH Zurich.
ACKNOWLEDGEMENTS
The authors would like to thanks the students of the
Photogrammetry course of the Politecnico of Milan of the
academical year 2003-04, in particular Marco Gianinetto,
Marco Maffei, Dario Molteni, Giovanni Sosio and Paolo Villa,
for their help given during the survey and processing phases of
the photogrammetric data.
