Conifer crown profile models from terrestrial laser scanning
نویسندگان
چکیده
منابع مشابه
Generating Building Outlines from Terrestrial Laser Scanning
Terrestrial laser scanned point cloud is a valuable data source for automatic building reconstruction. Detailed building facade structures from wall, roof, extrusion etc., can be recovered from the explicit three dimensional coordinates in the laser points. This paper presents our approach which generates building outlines semi-automatically from recognized building features. First, concave pol...
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With the high density point clouds obtained with terrestrial laser scanning, detailed building facade structures, such as windows, can be recovered. There are usually only a few laser points available for windows, because window frames are small parts on walls, and window glass reflects no laser beam. Insufficient raw laser information makes it very difficult to recover reliable geometry of a w...
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A terrestrial laser scanner was used to measure the three-dimensional structure of forest stands in the Swiss National Park, eastern Switzerland. Spatially coincident hemispherical photographs were taken at each sampling point and the position of each point was determined using differential GPS. A scanner model was derived in order to determine the expected number of laser shots in all directio...
متن کاملAutomatic Extraction of Building Features from Terrestrial Laser Scanning
Realistic 3D city models are required for many purposes such as urban planning and safety analysis. The traditional modeling methods are mainly based on manual or semi-automatic reconstruction from close-range images, which are rather time-consuming. The lack of fully automatic reconstruction is mainly due to the difficulty to recover building structures from close-range images. The terrestrial...
متن کاملLarge Scale Orthophotography Using Dtm from Terrestrial Laser Scanning
The production of orthophotographs at large scales for architectural photogrammetric applications faces a number of problems. The main difficulty arises when the ratio of the elevation differences on the object surface to the distance from the camera is large, or when there are surfaces with poor definition or little texture. In these cases the standard automatic DTM production algorithms fail ...
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ژورنال
عنوان ژورنال: Silva Fennica
سال: 2015
ISSN: 2242-4075
DOI: 10.14214/sf.1106