Results 21 to 30 of about 3,359,041 (235)

Near field enhancements from angled surface defects : a comparison of scanning laser source and scanning laser detection techniques [PDF]

open access: yes, 2011
Enhancement of the Rayleigh wave signal amplitude at a surface defect, due to interference of incident, reflected and mode converted waves, has been reported by several authors, and it has been suggested that this could be used as a fingerprint of the ...
Edwards, R. S. (Rachel S.)   +5 more
core   +1 more source

New Advances in Automated Urban Modelling from Airborne Laser Scanning Data [PDF]

open access: yes, 2011
Traditionally, urban models in many applications such as urban planning, disaster management, and computer games only require visual accuracy. However, more recently, updating urban infrastructure combined with the rise of mega-cities (i.e.
Hinks, Tommy   +7 more
core   +1 more source

Simulation of Stationary and Mobile Laserscanning with VRscan3D [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Terrestrial and mobile laser scanning technologies have become essential tools in geoinformation, surveying, cultural heritage documentation, and construction.
D. Gorkovchuk   +5 more
doaj   +1 more source

Estimation of 3D vegetation structure from waveform and discrete return airborne laser scanning data [PDF]

open access: yes, 2012
This study presents and compares new methods to describe the 3D canopy structure with Airborne Laser Scanning (ALS) waveform data as well as ALS point data.
Olofsson, Kenneth,   +12 more
core   +1 more source

Comparing tree structures derived among airborne, terrestrial and mobile LiDAR systems in urban parks

open access: yesGIScience & Remote Sensing, 2022
Measuring tree structure using three-dimensional (3D) mapping tools such as light detection and ranging (LiDAR) remote sensing is needed to provide well-managed and designed green spaces.
Heejoon Choi, Youngkeun Song
doaj   +1 more source

Estimation of stem attributes using a combination of terrestrial and airborne laser scanning [PDF]

open access: yes, 2012
Properties of individual trees can be estimated from airborne laser scanning (ALS) data provided that the scanning is dense enough and the positions of field-measured trees are available as training data.
Olofsson, Kenneth   +3 more
core   +1 more source

An Autonomous Ultra-Wide Band-Based Attitude and Position Determination Technique for Indoor Mobile Laser Scanning

open access: yesISPRS International Journal of Geo-Information, 2018
Mobile laser scanning (MLS) has been widely used in three-dimensional (3D) city modelling data collection, such as Google cars for Google Map/Earth. Building Information Modelling (BIM) has recently emerged and become prominent.
Lawrence Lau   +6 more
doaj   +1 more source

POLE-LIKE ROAD FURNITURE DETECTION IN SPARSE AND UNEVENLY DISTRIBUTED MOBILE LASER SCANNING DATA [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Pole-like road furniture detection received much attention due to its traffic functionality in recent years. In this paper, we develop a framework to detect pole-like road furniture from sparse mobile laser scanning data.
F. Li   +7 more
doaj   +1 more source

3D road surface reconstruction based on point clouds data assimilation algorithm

open access: yesMATEC Web of Conferences, 2017
Urban areas 3D model reconstruction is one of the major fields of application of 3D scanning technologies. In the future, vehicle-based laser scanning, here called mobile laser scanning system, should see considerable use for 3D road environment ...
Chen De-liang, Lu Yan-yan
doaj   +1 more source

Possible explanations for different surface quality in laser cutting with 1 micron and 10 microns beams [PDF]

open access: yes, 2012
In laser cutting of thick steel sheets, quality difference is observed between cut surfaces obtained with 1 micron and 10 micron laser beams. This paper investigates physical mechanisms for this interesting and important problem of the wavelength ...
Remy Fabbro   +3 more
core   +1 more source

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