4
7. CONCLUSIONS
QuickTime, 1995, Inside Macintosh. Addison-Wesley
Publishing Company.
In this paper we have presented a method to build virtual
models employing photographs taken from real environments.
The use of the photographs is of course more suited for an
excellent virtual visit because they reproduce exactly the scene,
in fact it is impos-sible to do the same thing with “synthetic”
images, pasted on reconstructed environments.
The image acquisition can be difficult in same cases, for
example often the camera setup cannot be optimized according
to the visiting environment. Furthermore the viewangle of the
camera is limited, i.e. a camera with focal length of 28mm
yields a field of view of 60° and with 15 mm it yields a field of
90°. The objectives with such reduced focal length are very
expensive and give highly distorted images. So, if we use these
objectives, we have to correct the distortion prior to build the
panoramic view.
Another issue, related to data collection, regards the availability
of sufficient number of camera stations: the more they are the
better can result the final model, but in the same time the
number of digitizing photos increases so as the time needed for
image processing.
Macintosh Programmer’s Workshop, 1995, Introduction to
MPW, Apple Computer Inc.
8. ACKNOWLEDGEMENTS
This study has been developed within the project “Definition of
a quality model for 3D digital cartography carried out by digi
tal photogrammetry, with suitable features for representing
urban building for planning mobile phone networks”.
Partly financed by MURST (Italian Ministry of University and
Research) in 1997 as a project of relevant national interest.
National coordinator: Riccardo Galetto; head of the research
unit: Antonio Vettore.
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Boscaini, A., 1995.Visualizzazione di ambienti caratterizzati da
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Michelin, M., 1995. Calcolo di trasformazioni proiettive
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Wolberg, G., Digital image warping. IEEE Computer Society
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Shenchang, E.C., 1995, QuickTime VR - An image—based ap
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Quick Time VR Authoring Tools Suite, 1994, Apple Computer
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Doyle, K., Cannot, J., April 1996, QuickTime VR 1.0 Panorama
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