By a News Reporter-Staff News Editor at Science Letter -- Fresh data on Remote Sensing are presented in a new report. According to news originating from Munich, Germany, by NewsRx correspondents, research stated, "The use of helicopters as a sensor platform offers flexible fields of application due to adaptable flying speed at low flight levels. Modern helicopters are equipped with radar altimeters, inertial navigation systems (INS), forward-looking cameras and even laser scanners for automatic obstacle avoidance."
Our news journalists obtained a quote from the research from Technical University, "If the 3D geometry of the terrain is already available, the analysis of airborne laser scanner (ALS) measurements may also be used for terrain-referenced navigation and change detection. In this paper, we present a framework for on-the-fly comparison of current ALS data to given reference data of an urban area. In contrast to classical difference methods, our approach extends the concept of occupancy grids known from robot mapping. However, it does not blur the measured information onto the grid cells. The proposed change detection method applies the Dempster-Shafer theory to identify conflicting evidence along the laser pulse propagation path. Additional attributes are considered to decide whether detected changes are of man-made origin or occurring due to seasonal effects. The concept of online change detection has been successfully validated in offline experiments with recorded ALS data streams."
According to the news editors, the research concluded: "Results are shown for an urban test site at which multi-view ALS data were acquired at an interval of 1 year."
For more information on this research see: Change detection in urban areas by object-based analysis and on-the-fly comparison of multi-view ALS data. Isprs Journal of Photogrammetry and Remote Sensing, 2013;86():52-64. Isprs Journal of Photogrammetry and Remote Sensing can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Isprs Journal of Photogrammetry and Remote Sensing - www.elsevier.com/wps/product/cws_home/503340)
The news correspondents report that additional information may be obtained from M. Hebel, Technical University of Munich, D-80290 Munich, Germany. Additional authors for this research include M. Arens and U. Stilla (see also Remote Sensing).
Keywords for this news article include: Munich, Europe, Germany, Remote Sensing
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