Proceedings of the Symposium on Progress in Data Processing and Analysis

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Monograph

Persistent identifier:: 856470848

Title:: Proceedings of the Symposium on Progress in Data Processing and Analysis

Sub title:: September 8 - 12, 1990, Dresden, GDR

Scope:: 1 Online-Ressource (396 Seiten)

Year of publication:: 1990

Place of publication:: Berlin

Publisher of the original:: Kammer der Technik

Identifier (digital):: 856470848

Illustration:: Illustrationen, Diagramme

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: [S 8 Design and Algorithmic Aspects of Digital Photogrammetric Systems]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: DIPS II - Turning a Standard Computer Workstation into a Digital Photogrammetric Station. A. Gruen, H.A. Beyer

Document type:: Monograph

Structure type:: Chapter

DIPS II - Tùrning a Standard Computer Workstation into a Digital Photogrammetric Station A. Gruen, H.A. Beyer Institute of Geodesy and Photogrammetry Swiss Federal Institute of Technology ETH-H5nggerberg, CH-8093 Zurich, Switzerland Abstract This paper describes an attempt to turn a standard computer workstation into a digital photogrammetric station, following the concept of modular design. Hence a basic advantage is the flexibility and openness of the system with respect to hardware and software integration, development and maintenance. At the Institute of Geodesy and Photogrammetry of the ETH Zurich, our digital photogrammetric station, DIPS II (Digital Photogrammetric Station II), consists of a number of Sun Workstations (Sun-3, Sun-4, SPARCstations) linked to each other via Ethernet with some external off-the-shelf components for digital image acquisition and output. All workstations can act individually or together as programming and processing platforms. Most software is written in C with a few minor portions in FORTRAN 77. Of particular value is DEDIP (Development Environment for Digital Photogrammetry) which is written in C, uses the Sun View window environment, provides for data structures and user interface, and accommodates most newly written programs. DIPS II serves as an indispensable tool and platform for all research and development projects of our group in digital photogrammetry, remote sensing, machine and robot vision. 1. Introduction The concept of a fully digital photogrammetric workstation is relatively new. Its importance for the future of photogrammetry as a discipline is indicated by the fact that a number of research and development groups have been actively pursuing the issue in recent years. In a survey paper, Helava (Helava, 1988) has outlined the merits of fully digital systems and described the status of technology with respect to different tasks and products. Some of the early developments have been referenced in Gruen, 1989. In the meantime the interest has even increased and new work can be found in Cogan et al., 1988; Konecny et al., 1988; Lohmann et al., 1988; Molander, McIntyre, 1989; Cruette, 1990; Gagnon ei al., 1990; Mori, Murai, 1990; RISM, 1990; Sarjakos/d, 1990; TOPCON, 1990. In 1985, our group started with a first prototype system using a commercial image processing system as the central core. As this “turn-key image processing system concept” turned out to be too restrictive with regard to software development and hardware additions we changed our basic system philosophy soon after to the “modular” approach {Gruen, 1989). Modularity means openness on the hardware and software side; it also stands for flexibility and adaptability with respect to costs and functionality. Our second generation digital station DIPS II, which is based on an extendable number of Sun-3 and Sun-4 workstations, linked to each other via Ethernet and equipped with off-the-shelf components for digital image acquisition and output, will be described in this paper. We will explain why the modular concept is of fundamental value to us. A major chapter is devoted to the hardware and software environment and the components of DIPS II. Computing times associated with certain algorithms will give an indication of the computational performance of the individual CPUs without the use of extra processor hardware. Finally, some typical applications, most of them performed as pilot projects, will be reported. 2. From DIPS I to DIPS II: Why the change in concept? In Gruen, 1986 a description of DIPS (I) was given, a system which was then based on the commercial image processing system KONTRON IPS 68K. Although this system gave fast access to standard image processing routines, anything which went beyond that and was typically photogrammetric in nature was cumbersome to install or not possible at all. Being fully dependent on the manufacturer with respect to hardware and software modifications and extensions did not

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