International Archives of Photogrammetry and Remote Sensing, Vol. 32, Part 7-4-3 W6, Valladolid, Spain, 3-4 June, 1999
Image coregistration may be facilitated, if the image data to be
registered show reduced distortions already in their original
form. This is achieved by small off-nadir incidence angles for
optical data, whereas for SAR systems the off-nadir incidence
angles should be large. A more detailed list of requirements to
be met in order to simplify geometric pre-processing of remote
sensing image data can be found in Schardt et al. (1999).
New methods to geometrically register image data are still in
development and will become operationally available. As one
alternative, image coregistration on the basis of automatic image
matching techniques has to be mentioned. It can be
implemented as a to a large extent automated, end-to-end
procedure for image geocoding. For sufficiently similar input
images, satisfactory results have already been achieved with this
procedure as implemented at the Institute of Digital Image
Processing. For more complex situations, however, particularly
for dissimilar images and for SAR imagery, the algorithms still
need to be seriously extended and optimised to be applicable for
operational image coregistration.
REFERENCES
Buchroithner M. (Ed.), 1989. Assessment of the Potential of
Spacebome Microwave Data for Land Cover/Land Use Studies
in Developing Countries. DIBAG-Report No. 44, Final report to
ESA/FAO contract.
Csathd B. and T. Schenk, 1998. Multisensor Data Fusion for
Automatic Scene Interpretation. International Archives of
Photogrammetry and Remote Sensing, Vol. XXXII, Part 7, pp.
336-341, Budapest.
Ehlers M„ 1983. Untersuchung von digitalen Korrelations ver
fahren zur Entzerrung von Femerkundungsaufnahmen. Ph.D.
dissertation, University of Hannover, Fachbereich Bau
ingenieur- und Vermessungswesen.
Haberäcker P., 1989. Digitale Bild Verarbeitung, Grundlagen
und Anwendungen. 3 rd Editon, Hanser-Verlag.
Joanneum Research, 1999. RSG in ERDAS IMAGINE. Field
Guide, Version 1.1.
Paar G. and W. Pölzleitner, 1992. Automatic 3D Elevation
Modelling by Pyramid-Based Stereovision Using Remotely
Sensed Data. In: Peter Mandl (Ed.), Modelling and New
Methods in Image Processing and in Geographical Information
Systems, Oldenburg-Verlag, pp. 95-110.
Pohl C. and J.L. van Genderen, 1998. Multisensor Image
Fusion in Remote Sensing: Concepts, Methods and
Applications. International Journal of Remote Sensing, Vol. 19,
No. 5, pp. 823-854.
Schardt M., Gallaun H„ Kenyi L.W., Raggam H. and A. Aimer
1999. Review Study in the Field of Monitoring Applications by
Data Fusion. Final Report, ESA/ESTEC, Contract No.
12723/98/NL/MV.
Schreier G. (Ed.), 1993. SAR Geocoding: Data and Systems.
Wichmann Verlag, Karlsruhe.
