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3D GEO-IMAGERY BRIDGING CONTINENTS
W, Schuhr *,. E. Kanngieser "
a University of Applied Sciences, 39114 Magdeburg, Germany; e-mail: schuhr3d@hotmail.com
? University of Applied Sciences, 22297 Hamburg, Germany; e-mail: e.kanngieser@rzen.haw-hamburg.de
Commission V, WG 4
KEY WORDS: Archaeology, Architecture, Data Mining, Photogrammetry, Spatial, Virtual Reality, Vision Sciences,
Visualization
ABSTRACT:
The general purpose of this paper is, to improve the perception and communication in 3D GEO-IMAGE recording,
documentation and information management.
In particular it deals with the improvement of Spatial Heritage-Imagery, as a worldwide Challenge
- by stimulating the scientific as well as the public interest in virtual Spatial Heritage visualization,
- by increasing high resolution virtual Heritage presentation due to the still underestimated gain of a complete additional
dimension,
- by gaining new and by collecting existing stereoviews of both media, analog and digital
- and by applying Heritage Stereoviews for monument recording, visualization, protection and reconstruction.
Consequently the Chapters of this paper are on gaining, collecting, providing, exchanging and on applying International
Heritage Stereoviews.
Chapter 1 states interesting messages and samples, for Scientists as well as for Amateurs, on gaining 3D Heritage-Imagery,
including, e.g., the use of DIGI BEAM CAMERAS LITE on a 10m telescope staff. In this context it is shown, this dealing with
fundamentals of spatial data visualization is required and still gains a surprising potential for further research, which at least has to
deal with 20 open research topics, like, e.g., the optimum base length etc..
Chapter 2, which deals the RecorDIM task group on Collecting, Compiling and Sharing Heritage Stereoviews, namely reports
on existing International Archives for 3D Heritage-Imagery with world wide web presentations. In addition this Chapter is on
recommended resolutions, available data-formats and on conditions for providing and exchanging 3D Heritage-Imagery.
Chapter 3, which is on applying of 3D Geo-Imagery, for the FIRST time deals with a COMPLETE (!) LIST of AVAILABLE
3D VISUALIZATION TECHNIQUES for VIRTUAL SPATIAL (Heritage- and Geo-) DATA PRESENTATION. in order to
advice on suited state of the art technology for Heritage Stereoview verification. For the first time stereo mates are presented in the
DOWN UNDER mode. Beside well established 3D visualization Techniques, by means of stereoscopes, anaglyphs, polarized
glasses, liquid crystal shutters, chromadepth etc., currently namely the dynamic NUOPTIX method, as already invented by
PULFRICH, and in particular the introduced FELIX SOLID STATE REAL(!) 3D SCREEN promise a great future for both, the
scientific as well as for the public 3D visualization. From a consequently dealing with the principals of spatial data visualization, :
even the future of the whole computer industry will improve!
1. GAINING 3D HERITAGE IMAGERY light., see Fig. 1. In the meantime a remote exposure and video
Nowadays serious photographic Heritage documentation at least
should deal with 3D photography! It is liked to emphasize, due
to the modern camera Technology, single lens cameras of both
types, analog and digital, for 3D photography even seem
superior to (often old fashioned) stereo cameras! Another big
advantage of single lens cameras is the relative low price, the
weight and the flexibility in baselength variation. To start up
taking own stereoviews of Heritage monuments, the object at
least should be photographed twice from partly different
projection centers (positions), which gives the baseline. The
same objectpart in the view-finder avoids vertical parallaxes and
on the stereoscopic perception side "the eyes forgive "small"
(up to 5 degrees) deviations from parallel camera axis".
As a matter of fact the gain of a complete additional dimension
from systematic stereoview photography for documentation
purposes is still underestimated and even until now for many
Heritage documentation purposes it is more believed in
subjective interpreted manual drawings than in objective high
resolution 3D photography!
In many cases recent aerial Photography of Heritage
Monuments and sites is not available or shows lack in
resolution. Due to own experiences, related to high resolution
mapping of historic objects, the authors invented the 10m DIGI
BEAM CAMERA LITE and "take their own high resolution
aerial photography from the ground". To overcome hindrances,
as caused by, e.g., tree crowns, stereoviews of the monuments
have been photographed with a digital Sony Cyber-Shot 5.0
Megapixel camera from 10 m height with a telescope staff
control has been established.
Though the virtual Heritage Documentation Technology as a
part of Geoinformationsystems (GIS) and/or
Monumentinformationsystems (MIS) is very advanced, dealing
with basics of spatial Heritage data visualization still gains a
surprising huge amount of at least partly open research topics,
like, eg,
a) Research topics for Technique and Arts Aspects of
stereoviews:
1. The market potential for stereo views
2. The professional potential of existing Archives for 3D-
pictures and movies.
3. The complete history for stereo imagery, including the
photo plasticon, see figure 7 (last view) and sample
stereoviews of figure 3, 4 and 5
4. The (stereoscopic) effect of combination of stereo mates
showing different pixel size
5. The effects of Fusion of different Sensor images (e.g.
optical and radar)
6. The benefit of combining day- and night MIS stereo mates
7. The effects of combination of "before and after" pictures
8. Therole of the dominant Eye
9. The potential of stereo-panorama-views
10. The potential of terrestrial stereo image blocks
11. The manipulation of (existing) real and synthetic
stereoviews to achieve a required deep perception
12. Optimum baselength for gaining stereoviews
