automatic extraction of man-made objects from large-
scale aerial images.
- Semi-automatic road extraction from raster image data,
based on dynamic programming
-Generation of generic house models from 3-D point
clouds for 3-D city models
- Correction of house roofs in digital orthoimages such
that they appear in a correct geometrical location
e Prof. H.-J. Schek, Institute of Information Systems, ETH
Zurich
- Database problems, conceptual aspects fo GIS,
database systems
* Prof. E. Spiess, Institute of Cartography, ETH Zurich
- Combination of vector and raster data in cartographic
applications
- Program development for thematic mapping, based on
knowledge-based systems
- Computer-assisted compilation and production of thematic
maps
- Digital production and update of the ,Swiss World Atlas"
with a CAD system
- Digital 3-D modelling of topographic and geologic maps
Prof. P. Stucki, Institute of Computer Science, University
of Zurich
- Virtual Reality and GIS
* Prof. P. Widmayer, Institute of Theoretical Computer
Science, ETH Zurich
- Data structure and algorithms to handle and manage
geometric (geographic and cartographic) data
- Fast access to 3-D data for real-time fly-overs.
More details about the members of the group and their
research projects can be found at the WWW Homepage
http://nobi. ethz.ch/ipeg/ipeg.html.
Also in 1994, the SIRS (Chair for Spatial Information
Systems, Prof. F. Golay) was established at EPF
Lausanne. The research activities of the SIRS follow two
main objectives:
* Development of a rational and efficient usability of spatial
information systems (SIS for different land management
purposes).
* Evaluation and development of methods for planning,
conception and implementation of SIS.
More details about the SIRS can be found at the WWW
Homepage http://dgrwww.epfl.ch/SIRS/index. html.
In the fields of responsibility of the various ISPRS Technical
Commissions the following activities are reported.
Commission |:
Tests of 3-line cameras in aerial and space applications and
recent developments in high resolution CCD sensor
developments were among the major topics of the
workshop ,From Pixels to Sequences-Sensors, Algorithms
and Systems“, held in Zurich in March 22-24, 1995.
Scanners as the main source of digital data in aerial
applications are being examined and calibrated at the
Institute of Geodesy and Photogrammetry (IGP), ETH
Zurich. Practical tests concerning the use of high resolution
stillvideo CCD cameras in aerial applications have been
conducted at IGP.
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B6. Vienna 1996
Commission Il:
* Several practical tests in digital aerotriangulation were
performed on the experimental Digital Photogrammetric
Station DIPSII of the Institute of Geodesy and Photogram-
metry, ETH Zurich using both aerial image blocks with
different resolution as well as high resolution still video
images of the Kodak DCS200 which were acquired from
a helicopter. For image point measurements least
squares template resp. image matching techniques were
used.
Both the Institute of Geodesy and Photogrammetry, ETH
Zurich and the Institute of Mensuration, EPF Lausanne
took part in the OEEPE test ,Aerotriangulation using
digitized images". Image point measurements in digital
aerial test images were performed on one experimental
and on three commercial Digital Photogrammetric
Stations: DIPS Il (ETH Zurich), Intergraph Image Station,
Helava/Leica DPW770 and DSW100 (EPF Lausanne).
Commission Ill:
e Semi-automatic monoplotting techniques, using feature
extraction based on dynamic programming and LSB-
Snakes as a data acquisition resource for GIS
applications have been developed at IGP.
Algorithms for automated, precise and reliable point and
surface measurement involving multiple images and
geometric constraints have been developed and tested at
IGP. The techniques have been modified using different
geometric constraints in order to be used for processing
of satellite imagery and edge measurement and tracking.
Extensive tests of the algorithms were performed with
aerial, satellite and close-range imagery.
* At IGP commercial systems for automated DSM/DTM
generation (Leica/Helava DPW770 and VirtuoZo) have
been used with aerial imagery of different types and
scales and compared to reference data (manually
measured or DHM25).
Generation of ortho-images, use of ortho-images for map
updating, their combination with other raster and vector
data and aspects of their integration in GIS have been
studied at IGP.
IGP and the Communications Technology Lab (IKT) of
ETH Zurich have started a project in 1994 on Automated
Man-Made Object Extraction from Aerial Images
(AMOBE). The project aims at semi-automated, high
quality reconstruction of buildings using multiple
information (multiple images, DSMs, texture, straight
edges, colour and infrared) and combining
photogrammetric and computer vision techniques. A very
successful workshop with participation of most major
international groups active on the above topic was
organised in April 1995 at Monte Verita, Ascona.
Research at the Multi-Media Lab, University of Zurich on
automatic shape measurement of free-form surfaces from
multiple cues is performed.
At IKT a general framework for model extraction from 2D
and 3D data sets using only a dictionary of generic
models is developed.
Commission IV:
Compare information under Chapters 1.2 and 1.3.
At the Institute of Geodesy and Photogrammetry, ETH
Zurich a joint project on "Processing of geodata for CAAD-
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