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A useful enrichment of videos captured by unmanned aerial vehicles (UAVs) is the annotation of image data or determining coordinates for objects in the video. This requires georeferencing of the video frames. For surveillance or reconnaissance applications, we propose georeferencing of UAV video frames with an ortho-photo. In this process, the challenge is to register temporally different images from...
The improved ground resolution of state-of-the-art synthetic aperture radar (SAR) sensors suggests utilizing SAR data for the analysis of urban areas. The appearance of buildings in SAR or interferometric SAR (InSAR) data is characterized by the consequences of the inherent oblique scene illumination, such as layover, occlusion by radar shadow, and multipath signal propagation. Therefore, particularly...
Terrestrial laser scanners produce point clouds with a huge number of points within a very limited surrounding. In built-up areas, many of the man-made objects are dominated by planar surfaces. We introduce a RANSAC based preprocessing technique that transforms the irregular point cloud into a set of locally delimited surface patches in order to reduce the amount of data and to achieve a higher level...
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