Christian Briese

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Terrestrial laser scanning provides a point cloud, but usually also the “intensity” values are available. These values are mainly influenced by the distance from sensor to object and by the object’s reflection properties. We demonstrate that it is possible to retrieve these reflection properties from the observed range and the intensity value. An experiment(More)
Airborne laser scanning also referred to as LIDAR became a standard method for the acquisition of topographic data. However, since the first commercial flights in 1994 a significant development in the sensor technology can be observed. These developments lead to a high increase in data volume due to a significant higher number of determined echoes as well(More)
Airborne laser scanning (ALS) is a widely used technique for the sampling of the earth’s surface. Next to the widely used geometric information current systems provide additional information about the signal strength of each echo. In order to utilize this information, radiometric calibration is essential. As a result physical observables that characterise(More)
Due to its ability to provide dense, fast and accurate range measurements, airborne laser scanning (ALS) is becoming increasingly popular for extensive, large area surveying tasks; however, there is still a lack of (published) methods for 3D segmentation and object modeling that exploit the full potential of this new technology. In this paper, we(More)
Outlining patches dominated by different plants in wetland vegetation provides information on species succession, microhabitat patterns, wetland health and ecosystem services. Aerial photogrammetry and hyperspectral imaging are the usual data acquisition methods but the application of airborne laser scanning (ALS) as a standalone tool also holds promises(More)
Today, digital terrain models (DTMs) are used in many fields of science and practice. When modelling the earth’s surface it is necessary to make a clear distinction between terrain models, i.e. models representing the terrain in the sense of the ‘bare soil’, and surface models, i.e. models that also include artificial buildings and vegetation. A DTM should(More)