Laser scanners for dimensional measurements
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The HDS6000 laser scanner was selected for the benchmark survey as it is well suited for laser scanning in underground environments, due to its high scan speed and data density.
[DOC File]Template - FIG Congress 2010
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Terrestrial laser 3D scanning is a survey method that utilizes laser technology when scanning the surface of an object. It analyzes a real-world or object environment to collect data on its shape and possibly its appearance (e.g. color). The collected data can then be used to construct digital, two-dimensional drawings or three-dimensional models useful for a wide variety of applications. [1].
[DOC File]Abstract - Stanford University
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Laser scanners have the same noise levels at all ranges and are not capable of the same near-field precision. The second main advantage is the high bandwidth of these sensors. Working at 30-Hz they can produce on the order of 105 independent range measurements from each frame, evenly distributed over the field of view of the camera. This last feature is particularly nice for constraining the ...
[DOCX File]Material and Methods
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Three-dimensional . data . Digital 3D track data can be obtained from a range of optical laser scanners and increasingly via digital photogrammetry (Falkingham, 2012; Bennett & Morse, 2014). Bennett et al. (2013) provide a comparative review of data derived from optical laser scanners and photogrammetry concluding that while the former gives more accurately scaled results the latter is ...
[DOC File]Template - FIG Working Week 2007
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3D terrestrial laser scanners capture three-dimensional geometry data of an object in a short period of time and save this information in 3D point clouds. These dense 3D point clouds offer many possibilities concerning the further use of that data: Interactive measurements, profile extraction, 3D modeling or automations in respect of object detection (Bienert 2008). The ability of a laser ...
[DOC File]LiDAR for vegetation applications
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However, in LiDAR measurements of forests, many of the ‘last return’ points may not penetrate to the ground level: indeed, should the small footprint laser hit a large leaf or branch, there may be essentially no difference between these points. We may term these samples ‘crown-crown’ points. Similarly, some points may be ‘ground-ground’ in that the first pulse, as well as the last ...
[DOC File]Laser triangulation: getting from point to line
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The scanCONTROL laser scanner is used for profile and contour measurements during running production processes of high volume, continuously produced goods (extrusion, milling, drawing, etc.) or single pieces. The Blue Laser technology is also used with laser profile sensors. The sensors are based on the laser line triangulation.
[DOCX File]Introduction:
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Laser scanners emit short pulses of light and detect the returned signal as the laser light bounces off the target object. The scanner calculates the distance to the target from the time delay of the returned signal. TLS requires a range of equipment, careful planning, and many hours of scanning in order to complete a successful survey, but it yields a . high resolution. topographic model ...
[DOCX File]Title of your Paper – Mind the Uppercase Letters
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The TLS measurements covered the lower reach with slope ~10° between approx. 500m a.s.l. to the torrent mouth at 394m a.s.l. with slopes of ~30° (figures 1). The torrent is formed by steep slopes, rocks and numerous cascades, a huge amount of dead wood create an addition obstacle for water flow. Entire torrent area is covered mainly with beech forests. The first data acquisition was carried ...
Specialist Project Services (SPS) Task Brief
Laser Class Class 1 Eye Safe Mounting 45° in both horizontal and vertical planes Note: Scan frequency has not been specified as the deliverable is outcome based i.e. a point cloud of 500ppm2 will allow the contractor freedom to carry out one or more runs dependant upon the frequency of the scanners used. These criteria are designed to ensure a sufficiently rich and accurate point cloud to be ...
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