4. CONCLUSIONS 
The increasing performance of computer technologies has 
encouraged a number of companies and researchers to 
develop digital photogrammetric workstations. This is a 
development which can be seen in the light of the increasing 
importance of precise digital image processing of high 
resolution digital stereoscopic images for the purpose of 
map production and revision. Many of these developments 
have been based on standard available general purpose 
image processing systems. Due to the development of very 
powerful new processors and computer architectures, 
which have a processing power close to super-computers, 
and the existance of adequate display and storage capacities 
as well as algorithms and their knowledge based implemen 
tations it is expected that these systems wilt become 
operational very soon and shorten the time gap between 
data acquisition and the availability of results. 
5. REFERENCES 
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2. Helava, U.V.: On System Concepts for Digital Automation 
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3. Lohmann, P., Picht, G., Weidenhammer, J., Jacobsen, K., 
Skog, L.: The design and implementation of a digital 
photogrammetric stereo-workstation. Proc. ISPRS, 1988, 
Kyoto, Japan. 
4. Weidenhammer, J.: Aspects of digital photogrammetric 
workstations for GIS data acquisation and processing. 
Proc IGARSS, 1989, Vancouver, Canada. 
5. Digital Video Systems Hannover: The image sequence 
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1988 
6. Mueller, J.-P., Collius, K.A., Otto, G.P., Roleerts, J.B.G.: 
Stereo matching using transputer arrays. Photogrammetric 
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