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Web based visualisation of 3D radar and LiDAR data

Web based visualisation of 3D radar and LiDAR data

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作者： Adriaan van Natijne Delft University of Technology

Laser scanners and Interferometric SAR both create point clouds. Their density, position accuracy, varying on the sensor. To improve the interpretation of the low density InSAR data a combination is made with high density airborne and terrestrial laser scanner data. Allowing for improvement of the positioning of the scatterers and the understanding of their behaviour. This combination is implemented as a web application, suitable for researchers to create 3D visualisations for the greater public. Challenges are: the high volume nature of point clouds; inhomogeneous coverage of laser measurements; different coordinate systems and limited processing power of web-browsers. All datasets were brought to the same coordinate system and where possible enriched with other sources such as aerial photographs and maps. Tiling was applied to limit downloads and processing requirements at the web-browser. Clustering of InSAR data may be applied to group points with similar behaviour while preserving unique features in the data. Results of this work are a demo application, this report and a manual on how to make a similar application based on a combination of yet existing tools. These visualisations will allow for a new approach in InSAR analysis, integrating measurements with their surroundings.

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Integrated multi-sensor perimeter detection system

Integrated multi-sensor perimeter detection system

引用

Optics and Photonics for Counterterrorism and Crime Fighting III

作者： Kent, P.J. Fretwell, P. Barrett, D.J. Faulkner, D.A. QinetiQ Ltd. Malvern Technology Park St. Andrews Road Malvern Worcestershire United Kingdom

ISBN: (纸本)9780819468994

The report describes the results of a multi-year programme of research aimed at the development of an integrated multisensor perimeter detection system capable of being deployed at an operational site. The research was driven by end user requirements in protective security, particularly in threat detection and assessment, where effective capability was either not available or prohibitively expensive. Novel video analytics have been designed to provide robust detection of pedestrians in clutter while new radar detection and tracking algorithms provide wide area day/night surveillance. A modular integrated architecture based on commercially available components has been developed. A graphical user interface allows intuitive interaction and visualisation with the sensors. The fusion of video, radar and other sensor data provides the basis of a threat detection capability for real life conditions. The system was designed to be modular and extendable in order to accommodate future and legacy surveillance sensors. The current sensor mix includes stereoscopic video cameras, mmWave ground movement radar, CCTV and a commercially available perimeter detection cable. The paper outlines the development of the system and describes the lessons learnt after deployment in a pilot trial.

关键词： Image sensors

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3D Urban models from laser radar data

3D Urban models from laser radar data

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2007 Urban Remote Sensing Joint Event, URS

作者： Tolt, Gustav Söderman, Ulf Ahlberg, Simon Department of Sensor Informatics Division of Sensor Technology Swedish Defence Research Agency Linköping Sweden FORAN Remote Sensing AB Linköping Sweden FOI

ISBN: (纸本)1424407125

Updated geographic information and 3D models of environments are becoming increasingly important for applications such as city planning, crisis management, visualisation, architecture, and landscaping. The task of producing detailed geospecific terrain databases or 3D city models has traditionally been manual and thus time-consuming, and the availability of appropriate source data has been limited. The use of available sensors such as airborne laser scanners (ALS) and digital cameras provides new opportunities to acquire detailed remote sensing data of the natural environment. This type of data is very suitable as the basis for the construction of high-fidelity 3D virtual environment models. To make use of this new type of data and to develop applications as mentioned above requires new methods for processing 3D sensor data and extracting geographic feature information from the data. In this paper we present recent results from the development of methods for processing ALS data and for transforming the data into geographic information and environment models, with the emphasis on urban environments. The long term objective of our work is the development of new methods for rapid and highly automated extraction of geographic information to support the construction of high-fidelity 3D virtual environment models from remote sensing data. As remote sensing data we use data from current high resolution ALS systems and digital cameras. © 2007 IEEE.

关键词： Geographic information systems

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A distributed stand-in EW hunter-killer system

A distributed stand-in EW hunter-killer system

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International Conference on Information Fusion

作者： Kim Brown Sam Drake Keith Mason Andrew Piotrowski Leszek Swierkowski Defence Science and Technology Organisation Edinburgh SA Australia

ISBN: (纸本)9780662478300

DSTO Australia concluded a two year research program in March 2006 that demonstrated distributed, autonomous, self-organising stand-in sensor and effector systems. This paper describes research activities from this program including the development of miniaturised sensor and effector payloads, the development of novel algorithms for the fusion of data from distributed sensor payloads and the development of novel aircraft control algorithms to enable near optimal geo-location of pop-up emitters. The paper also describes field trials in which information products from these systems were injected into command support systems for integration and visualisation with other data to support situational awareness. A follow-on program has been approved and is also overviewed in this paper.

关键词： sensor systems sensor fusion Payloads radar detection radar tracking Cameras Australia sensor phenomena and characterization Aerospace control Helicopters

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3D Urban Models from Laser radar data

3D Urban Models from Laser Radar Data

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Urban Remote Sensing Joint Event

作者： Gustav Tolt Ulf Soderman Simon Ahlberg Department of Sensor Informatics Division of Sensor Technology Swedish Defence Research Agency Linkoping Sweden FORAN Remote Sensing AB Linkoping Sweden

关键词： Laser radar Urban planning Laser modes Remote sensing Digital cameras Virtual environment data mining Crisis management Visualization Visual databases

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3 D laser sensing at FOI -: overview and a system perspective

3 D laser sensing at FOI -: overview and a system perspectiv...

引用

Conference on Laser radar technology and Applications IX

作者： Steinvall, O Klasen, L Grönwall, C Söderman, U Ahlberg, S Persson, I Elmqvist, M Larsson, H Letalick, D Andersson, P Carlsson, T Henriksson, M Swedish Def Res Agcy Div Sensor Technol Dept Laser Syst FOI S-58111 Linkoping Sweden

ISBN: (纸本)0819453358

This paper will give an overview of 3 D laser sensing and related activities at the Swedish Defence Research Agency (FOI) in the view of system needs and applications. Our activities include data collection of laser signatures for target and backgrounds at various wavelengths. We will give examples of such measurements. The results are used in building synthetic environments, modelling of laser radar systems and as training sets for development of algorithms for target recognition and weapon applications. Present work on rapid environment assessment includes the use of data from airborne laser for terrain mapping and depth sounding. Methods for automatic target detection and object classification (buildings, trees, man-made objects etc.) have been developed together with techniques for visualisation. This will be described in more detail in a separate paper. The ability to find and correctly identify "difficult" targets, being either at very long ranges, hidden in the vegetation, behind windows or under camouflage, is one of the top priorities for any military force. Example of such work will be given using range gated imagery and 3 D scanning laser radars. Different kinds of signal processing approaches have been studied and will be presented more in two separate papers. We have also developed modeling tools for both 2 D and 3 D laser imaging. Finally we will discuss the use of 3 D laser radars in some system applications in the light of new component technology, processing needs and sensor fusion.

关键词： sensors LIDAR Target recognition Target detection 3D modeling Staring arrays Eye Laser systems engineering Weapons Environmental sensing

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Proceedings of SPIE: radar sensor technology and data visualization

Proceedings of SPIE: Radar sensor technology and data visual...

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radar sensor technology and data visualisation

The proceedings contain 24 papers from the conference of SPIE: radar sensor technology and data Visualization. Topics discussed include: use of passive radar for mapping lightning channels in a thunderstorm;high-resolution Doppler model of the human gait;modeling targets in a forest at VHF and UHF frequencies;ground penetrating radar signal processing techniques for airfield evaluations;three-dimensional reconstruction from ISAR sequences and general-purpose electronic warfare system test configuration data model.

关键词： Doppler radar

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Erratum: (radar sensor technology and data Visualization (1 April and 4 April 2002))

Proceedings of SPIE - The International Society for Optical ...

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Proceedings of SPIE - The International Society for Optical Engineering 2002年 4744卷 241-241页

作者： Faust, Nickolas L. Kurtz, James L. Trebits, Robert

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