True orthophoto generation using multi-view aerial images
Usually aerial imagery are acquired through perspective projection which results in relief displacement in the map. Therefore, orthophotos from large scale aerial images over urban area often suffer from double mappings caused by sudden elevation changes in the scene. In the generation of true ortho...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2014-08-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-3/67/2014/isprsarchives-XL-3-67-2014.pdf |
| Summary: | Usually aerial imagery are acquired through perspective projection which results in relief displacement in the map. Therefore, orthophotos
from large scale aerial images over urban area often suffer from double mappings caused by sudden elevation changes in the
scene. In the generation of true orthophotos, one aims at removing these perspective displacements and occlusions. Hence, knowledge
of the surface shape is needed, as it has great impacts both on the orthorectification and occlusion identification. Mostly, the relief displacements
are caused by buildings. In this paper, we present a method for the generation of true orthophotos from overlapping aerial
images of known orientation, especially in built-up areas. Apart from the aerial images, the method does not depend on additional
data sources. In particular, we focus on the derivation of building roof outline model using image segmentation and edge detection
techniques under the guide of the classification result of point cloud from image matching . Experiment results on real data show the
feasibility and the performance of the method. |
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| ISSN: | 1682-1750 2194-9034 |