PROCESSING OF SCANNING ELECTRON MICROSCOPE IMAGERY 
IN A DIGITAL STEREOPHOTOGRAMMETRIC SYSTEM (DSS) 
Gerhard Koenig, Wolfgang Nickel, Juergen Storl 
Technical University of Berlin 
Department for Photogrammetry and Cartography 
Federal Republic of Germany 
Commission II, WG 11/2 
ABSTRACT 
The concept of a Digital Stereophotogrammetric System (DSS) was presented by 
ALBERTZ/KOENIG at the ISPRS congress in Rio de Janeiro in 1984. Since that time 
an experimental system has been set up which is suitable for automatic processing 
of digital stereo images of limited size (512 x 512 pixels). 
The system offers a variety of algorithms to improve the image quality as well as 
several methods for system calibration. Resampling provides a y-parallax-free 
model so that epipolar geometry can be assumed for stereo processing. The DSS can 
be operated in two modes, either by automated correlation or by a human operator. 
Correlation may be applied following a regular grid or along the points chosen by 
means of an interest operator. Conventional plotting of stereoscopic imagery could 
be achieved by use of a three-dimensional floating mark. 
In this paper the first experiences in automatic processing of digitized Scanning 
Electron Microscope images are discussed. 
INTRODUCTION 
At the ISPRS congress in Rio de Janeiro in 1984 ALBERTZ/KOENIG (2) reported on 
the concept of a Digital Stereophotogrammetric System (DSS) at the Technical 
University of Berlin. The aim of the DSS working group is to study the realization of 
this digital conception by developing an experimental system based on a 
commercially available image processing system. Up to now a system has been set 
up which allows automatic processing of imagery not exceeding the capacity of the 
image memories. The main hardware components of the system, now installed at the 
Department for Photogrammetry and Cartography, are shown in fig. 1. 
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