Browsing by Subject "Optical radar"

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  • Schachtschneider, Julia; Schlichting, Alexander; Brenner, Claus (London : International Society for Photogrammetry and Remote Sensing, 2017)
    Self-driving cars and robots that run autonomously over long periods of time need high-precision and up-to-date models of the changing environment. The main challenge for creating long term maps of dynamic environments is ...
  • Stawiarski, Christina; Träumner, Katja; Kottmeier, Christoph; Knigge, Christoph; Raasch, Siegfried (Berlin : Kluwer Academic Publishers, 2015)
    Dual-Doppler lidar has become a useful tool to investigate the wind-field structure in two-dimensional planes. However, lidar pulse width and scan duration entail significant and complex averaging in the resulting retrieved ...
  • Niemeyer, Joachim; Rottensteiner, Franz; Sörgel, Uwe; Heipke, Christian (Hannover : International Society for Photogrammetry and Remote Sensing, 2015)
    In this investigation, we address the task of airborne LiDAR point cloud labelling for urban areas by presenting a contextual classification methodology based on a Conditional Random Field (CRF). A two-stage CRF is set up: ...
  • Jacobsen, Karsten (Hannover : International Society for Photogrammetry and Remote Sensing, 2014)
    Height information is a basic part of topographic mapping. Only in special areas frequent update of height models is required, usually the update cycle is quite lower as for horizontal map information. Some height models ...
  • Schmidt, Alena; Rottensteiner, Franz; Sörgel, Uwe; Heipke, Christian (Hannover : International Society for Photogrammetry and Remote Sensing, 2014)
    We propose a method for the automatic extraction of fluvial networks in lidar data with the aim to obtain a connected network represented by the fluvial channels' skeleton. For that purpose we develop a two-step approach. ...
  • Bayburt, S.; Kurtak, A.B.; Büyüksalih, G.; Jacobsen, Karsten (London : International Society for Photogrammetry and Remote Sensing, 2017)
    In a project area close to Istanbul the quality of WorldDEM, AW3D30, SRTM DSM and ASTER GDEM2 have been analyzed in relation to a reference aerial LiDAR DEM and to each other. The random and the systematic height errors ...
  • Niemeyer, Joachim; Rottensteiner, Franz; Sörgel, Uwe; Heipke, Christian (Göttingen : Copernicus GmbH, 2016)
    We propose a novel hierarchical approach for the classification of airborne 3D lidar points. Spatial and semantic context is incorporated via a two-layer Conditional Random Field (CRF). The first layer operates on a point ...
  • Steensen, Torge; Müller, S.; Jandewerth, M.; Büscher, O. (Hannover : International Society for Photogrammetry and Remote Sensing, 2014)
    To decrease the dependency on fossil fuels, more renewable energy sources need to be explored. Over the last years, the consumption of biomass has risen steadily and it has become a major source for re-growing energy. ...
  • Schmidt, Alena; Sörgel, Uwe (Hannover : International Society for Photogrammetry and Remote Sensing, 2013)
    In coastal areas morphological changes of various kinds are caused by tidal flows, storms, climate change, and human activities. For these reasons a recurrent monitoring becomes necessary in order to detect undesired changes ...
  • Schmidt, Alena; Rottensteiner, Franz; Sörgel, Uwe (Hannover : International Society for Photogrammetry and Remote Sensing, 2013)
    Coastal areas are characterized by high spatial and temporal variability. In order to detect undesired changes at early stages, enabling rapid countermeasures to mitigate or minimize potential harm or hazard, a recurrent ...
  • Zhang, Z.; Yang, M.Y.; Zhoua, M. (Hannover : International Society for Photogrammetry and Remote Sensing, 2013)
    Feature fusion of remote sensing images and LiDAR points cloud data, which have strong complementarity, can effectively play the advantages of multi-class features to provide more reliable information support for the remote ...
  • Niemeyer, Joachim; Sörgel, Uwe (Hannover : International Society for Photogrammetry and Remote Sensing, 2013)
    Traditional ship-based bathymetric surveys based on echo sounding are expensive and time consuming. This paper presents a project with the aim of identifying the opportunities of airborne laser bathymetry for the monitoring ...
  • Dold, Christoph; Brenner, Claus (London : International Society for Photogrammetry and Remote Sensing, 2006)
    The fully automatic registration of terrestrial scan data is still a major topic for many research groups. Existent methods used in commercial software often use artificial markers which are placed in the scene and measured ...
  • Schlichting, Alexander; Brenner, Claus (Göttingen : Copernicus GmbH, 2016)
    LiDAR sensors are proven sensors for accurate vehicle localization. Instead of detecting and matching features in the LiDAR data, we want to use the entire information provided by the scanners. As dynamic objects, like ...
  • Kanani, Farah; Träumner, Katja; Ruck, Bodo; Raasch, Siegfried (Stuttgart : Gebrüder Borntraeger Verlagsbuchhandlung, 2014)
    A recent study has shown that Doppler lidar is a state-of-the-art method to obtain spatially and temporally resolved flow fields in forest edge flow regimes. In that study, the general flow features observed by lidar were ...