Laser Scanning

Both overview and detail are necessary during all phases of disaster management: preparedness, prevention, emergency response, recovery, mitigation and damage assessment; and both can be simultaneously provided by earth observation (EO) from air or space. Three main EO technologies can be used: optical imaging, radar and laser scanning, the latter two being active techniques emitting energy from the sensor and detecting the backscatter. Optical imagery requires sunlight, and is most often used. Since the information is similar that perceived by the human eye, its interpretation is not restricted to GI masters. Geocoded imagery and orthophoto maps can also be automatically... (read more)
2008-04-11 12:00:00
2009-08-12 09:59:32

Terrestrial Laser Scanning

How It Works and What It Does
Terrestrial laser scanners are contact-free measuring devices which can collect dense point-clouds of objects. After processing each point is assigned with X, Y, Z coordinates; colour and reflectance value. The relative precision, that is the ratio between absolute precision and measurement range, is better than 10-4. This technology is becoming increasingly important for surveying applications. The authors provide an overview of how the technology works, illustrated by examples from their own research activities. Lasers emit electromagnetic radiation, which is coherent and monochromatic. The emitted beams are highly directional, contain a lot of energy, bridge hundreds of metres and are reflected... (read more)
2010-12-03 02:41:52

Laser Scanning and Archaeology

Standard Tool for 3D Documentation of Excavations
Terrestrial 3D laser scanning will become the future standard tool for high-resolution 3D documentation of archaeological excavations, but its capabilities are still underestimated by professional archaeologists and providers of scanners or scanning services. The new tool forces archaeologists to consider extension of archaeological stratigraphy theory. The author shows examples of the beneficial use of laser scanning and proposes an extended theory. Excavation forms the main data retrieval process in field archae­ology but is also destructive, based as is it upon salvaging in the reverse order of deposition or creation. Reconstruction of the site as it was is very important and... (read more)
2007-09-19 12:00:00

Laser Scanning Software

Z+F UK develop their own brand of laser scanning software called 'Light Form Modeller' or LFM. LFM is known for its array of CAD interfaces that allow users to seamlessly integrate laser scan data into their preferred CAD or review package.     LFM is part of the Bentley and Autodesk developer Networks. It can interface with Microstation, AutoPlant, AutoCAD, CADWorx and also VR Context's Walkinside product. It is also above to interface with CAD packages for the Process market e.g. Intergraphs PDS, SmartPlant Review, SmartPlant 3D and AVEVA's PDMS and Review packages. In relation to colour laser scan data... (read more)
2009-05-28 03:13:25

Laser Scanning Data Processor

The latest version of Pointools Edit utilises the full power of 64-bit for faster editing and processing of point cloud data, the millions of 3D measurements collected by laser scanning devices. The application builds on the features of View Pro visualisation software, with point cloud layer-based editing and segmentation. Pointools Edit also enables simple RGB re-colouring together with easy noise and obstruction cleaning. Pointools Edit features point layer technology for flexibility and speed when editing point cloud data. Layers can be used to segment, clean and re-colour the huge data files created by laser scanning instruments. Colour errors can also... (read more)
2010-05-20 02:24:15

Making Laser Scanning Simple

FARO
FARO Technologies, headquartered in Lake Mary, USA, is specialised in 3D measurement, imaging and realisation technology. The company develops and markets computer-aided measurement and imaging devices and software. The technology permits high-precision 3D measurement, imaging and comparison of parts and complex structures within production and quality assurance processes. The devices are also used for documenting large volume spaces or structures in 3D. FARO had its start in a friendship between two self-proclaimed ‘techno-junkies’ who were working on their PhDs in biomedical engineering at McGill University in Montreal, Canada. Simon Raab and Greg Fraser founded Res-Tech on 21 February 1981, and... (read more)
2014-04-30 10:36:07

Continuous Mobile Laser Scanning

Mobile Platform Terrestrial Lidar, IMU and GPS
Combining Terrestrial Laser Scanning, Position and Orientation Systems and GPS receivers into a mobile mapping system enables effective mapping of large and complex terrain. The authors tested a mobile mapping system at two sites: in an open pit mine, and along a road.<P> Optech and Sineco have been developing a mobile mapping system, initially based on a platform combining the ILRIS-3D (Intelligent Laser Ranging and Imaging System), the Applanix POS LV (land-based vehicle) and GPS receivers. This new system, ILRIS-MC (Motion Compensation), can be installed on any mobile platform and performs fast surveys, generating point-clouds in real time in WGS84... (read more)
2007-12-08 12:00:00

Mobile Laser Scanning Platform

RIEGL Laser Measurement Systems' V-Line laser scanner generation was a main feature in the overview of the company's laser scanner product range at Intergeo. The Austrian company was showing terrestrial, airborne, mobile and industrial applications.   The combination of the last year launched V-Line Laser Scanners with appropriate IMU/GPS equipment results in this year's RIEGL innovation: the Mobile Laser Scanning System RIEGL VMX-250.   This compact, rugged and lightweight mobile laser scanning system for highly accurate and high-resolution dynamic 3D data collection impresses with its extraordinary ease of use which convinced the visitors during the live presentation. The system consists... (read more)
2009-10-09 12:08:25

Laser Scanning Technology Challenged

Shortcomings in Spatial Documentation of Heritage Sites
In this month’s Insider’s View Prof. Heinz Rüther puts some critical points on the shortcomings of laser-scanning technology in the spatial documentation of heritage sites. We invited manufacturers of laser-scanning sensors and software to comment on his challenging observations. Nearly 70% of the companies responded (ten in total) and seven felt qualified to reply: Optech, Riegl, Leica Geosystems, 3rd Tech, Visual Learning Systems, TopoSys and I-SiTE 3D Laser Imaging. We thank all respondents for their time and effort. Critical observations made by Prof. Heinz Rüther include the following. (1) The processing time of laser-scan data can be up to ten... (read more)
2007-02-23 12:00:00
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