The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B5. Beijing 2008 
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2. APPLICATIONS OF 3D IMAGES 
A complete overview of existing Collections of international 
stereo views is more than overdue. Namely to mention in this 
respect is the International Stereoscopic Union (ISU) with 900 
members from 32 states, compare also Waldsmith (2002). 
Doubtless the most important international Archive for stereo 
views is the Keystone-Mast collection, which the UCR 
(University of California Riverside) runs in cooperation with 
the CMP (California Museum of Photography), which holds 
more than 350000 (analogue) stereo views of, e.g., the famous 
Keystone Company, of Underwood and Underwood and of 
H.C.White etc., dating from 1892 to 1963. The current 
digitization rate is approximately 10%.The HAN 3D archive 
in Seoul (South Korea) is another sample of a very important 
archive for unique specimen of National stereo views. 
In this context it is also liked to remember the famous historic 
German Photogrammetrist Meydenbauer, whose archive is 
still maintained as a part of the Conservation Institute of 
Brandenburg in Germany. It consists of more than 10000 
stereo views on super sized glass, showing important 
monuments of Germany. These authentic historic stereo views 
in many cases very successfully have been applied for 
rebuilding and restoration purposes. Beside their documentary 
value stereo views contain important detailed 3D geometric 
and radiometric information. 
It is highly recommended, to digitize the available handed 
down stereo views systematically with at least 500 dots per 
inch digitization rate and to use a modem storage medium, 
like Hard Disk, CD-ROM, DVD etc., see Chapter 3. Thus for 
daily applications the digital data and print of such images can 
be used, while the original is protected and kept for exclusive 
operations only. 
The quality of the original 3D image can even improve by 
separate removing of speckles and scratches etc. and by 
increasing the radiometric appearance of the (now digital) 
stereo views. 
Historic view of the Keystone 
3D image of the flying horse of Xi’an (China) 
Figure 2. 4 Masterpieces of the Keystone-Mast Collection representing approximately 350000 3D images (left) and recent digital 
Heritage stereo views of the Silk road (right) 
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Figure 3. The 10 to 15m telescope-rod digital 3D Camera Lite, to obtain near range digital aerial stereo views (University of 
Applied Sciences Magdeburg) and comparison of objective stereo mates and a subjective interpreted manual sketch of a historic 
benchmark (courtesy Amt for Denkmalschutz, State of Saxony-Anhalt, Germany) 
3D image of the historic Silk road: 
Ruins of BABYLON 
3D image of NEMRUD DAG at the Silkroad 
(1996 byCho Gui-Ja)