ISPRS Commission III, Vol.34, Part 3A „Photogrammetric Computer Vision“, Graz, 2002
planning a fully automatic step we are calling sky line fit-
ting. In this step we are matching roof lines in the terres-
trial images instead of selecting control points.
ACKNOWLEDGMENTS
Parts of this work have been done in the VRVis research
center, Graz and Vienna/Austria (http://www.vrvis.at), which
is partly funded by the Austrian government research pro-
gram Kplus.
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A - 192
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(a) The left part shows an aerial image of Graz. The lower
strip shows a preview of an image sequence. The active
image is shown on the right side.
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(b) The left part shows a close up of one aerial image with
superimposed roof lines and two selected control points.
The right part shows the terrestrial image with superim-
posed roof lines using the vanishing points and the corre-
sponding control points.
lex
(c) The upgrade of a whole image sequence from rel-
ative to geo-referenced orientation is done by selecting
two control points in two images.
Figure 7: GUI for the semi-automatic fitting of one terres-
trial image to the 3D model.
