scholarly journals Improved in-situ structural evaluation of historic buildings incorporating a 3D laser scanning technique

2007 ◽  
Author(s):  
C.-J. Chen ◽  
T.-C. Wu
Keyword(s):  
Laser Scanning ◽  
Historic Buildings ◽  
3D Laser Scanning ◽  
Structural Evaluation ◽  
Scanning Technique

Ore Volume Measurement Based on 3D Laser Scanning Technique: a Case Study

2012 ◽  
Vol 610-613 ◽  
pp. 3708-3714
Author(s):  
Tien Thanh Nguyen ◽  
Xiu Guo Liu ◽  
You Huang ◽  
Hong Ping Wang ◽  
Quoc Lap Kieu ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Laser Scanner ◽  
Mining Industry ◽  
Original Data ◽  
Volume Measurement ◽  
3D Laser Scanning ◽  
Noise Elimination ◽  
Cloud Data ◽  
Data Registration ◽  
Scanning Technique

In the mining industry, conventional methods such as GPS and total station technology are used most extensively for data collection and in return used to compute volume of extracted materials (ore and waste). In situation where the ore body is bigger in size, and changes dynamically, the use of conventional method to measure volume of ore is not practicable and economically viable because of the workload involved, precision and accuracy of the survey and safety of workers. In this paper a method and work flow of ore heap volume measurement by using 3D laser scanning technique to acquire point cloud data was introduced. RiSCAN PRO and Geomagic studio was used to process the original data (registration, noise elimination, georeferencing, resampling etc.), 3D modeling and volume computations. A comparison on precision of geodetic control points coordinate measured by GPS receivers and 3D laser scanner was carried out. The results indicate that 3D laser scanning technique can effectively be applied to ore output volume measurement since it satisfies the requirement of ore volume measurement.

scholarly journals 3D LASER SCANNING TECHNIQUE FOR THE INSPECTION AND MONITORING OF RAILWAY TUNNELS

2017 ◽  
Vol 10 (SE) ◽  
pp. 73-84 ◽  
Author(s):  
Han-Mei CHEN ◽  
Cristian ULIANOV ◽  
Ramy SHALTOUT
Keyword(s):  
Laser Scanning ◽  
3D Laser Scanning ◽  
Scanning Technique

3D Laser Scanning at Church Hole, Creswell Crags

2007 ◽  
Author(s):  
Alistair Carty
Keyword(s):  
Laser Scanning ◽  
Three Dimensional ◽  
Point Of View ◽  
3D Laser Scanning ◽  
Natural Processes ◽  
Planar Surfaces ◽  
3D Surface ◽  
Third Dimension ◽  
Visualization Techniques

The process of recording in situ archaeological art can be a time-consuming and complex task, especially on inaccessible and non-planar surfaces such as those found in Church Hole, Creswell Crags. There are considerable challenges to the recorder, including the accurate positioning and fixing of survey frames, the physical discomfort of sitting, crouching, or even lying down for long periods of time in cramped surroundings, and, ultimately, the difficulty in interpreting the panels to enable accurate recording. Furthermore, the more accurate forms of traditional recording include the taking of rubbings of the carvings, a process known to increase the potential of damage to already fragile artworks. 3D laser scanning offers solutions to most of these problems by quickly producing a highly dense fully three-dimensional surface map of the art which can be studied in more conducive circumstances by researchers at a later date. Furthermore, powerful visualization techniques can be applied to the 3D surface map to extract and enhance detail that might be virtually invisible to the naked eye. Over-arching the visualization and interpretational aspects of 3D laser scanning is the potential to use the acquired 3D surface map to monitor any change in the surface through repeated scanning over a period of time. This technique is suitable for detecting minute differences in the surface over time, including both erosion due to natural processes or vandalism and accretion through build-up of deposits on the surface of the art. The most complex aspect of three-dimensional recording, no matter what the subject matter, is that of the third dimension. People have an almost schizophrenic way of looking at the world. For example, if you were to place two identical objects a distance apart, it is simple to state that one object is further away than the other due to our perception of depth and the ability to walk around the two objects. However, if you were to take a photograph or make a drawing of the scene from one point of view, it becomes difficult to tell whether two identical objects are placed some distance apart, or if two differently sized objects sit beside one another. The three-dimensionality of the scene is now lost and is available by inference only.

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