document

Land use classification of polarimetric SAR data by visual interpretation and comparison with an automatic procedure

van den Broek, A.C. (author), Smith, A.J.E. (author), Toet, A. (author), TNO Fysisch en Elektronisch Laboratorium TNO Technische Menskunde (author)

A study is presented in which several representations of polarimetric SAR data were evaluated for the purpose of obtaining land use classification. Two methods comprising visual interpretation and an automatic procedure were used. For the study, fully polarimetric SAR data with a resolution of 3m were obtained with the Dutch PHARUS sensor from a...

article 2004

document

The Dedicated Aerosol Retrieval Experiment (DARE): scientific requirements for a dedicated satellite instrument to measure atmospheric aerosols

TNO Fysisch en Elektronisch Laboratorium TNO Industrie (author), Decae, R. (author), Bazalgette Courrèges-Lacoste, G.A.F. (author), de Leeuw, G. (author)

DARE (Dedicated Aerosol Retrieval Experiment) is a study to design an instrument for accurate remote sensing of aerosol properties from space. DARE combines useful properties of several existing instruments like TOMS, GOME, ATSR and POLDER. It has a large wavelength range, 330 to 1000 nm, to discriminate between aerosol types. The wide swath...

conference paper 2004

document

In search of an objective measure for the perceptual quality of printed Images

TNO Fysisch en Elektronisch Laboratorium TNO Technische Menskunde (author), Dijk, J. (author)

This thesis is concerned with the topic of perceptual image quality. Our visual communication is mainly based on images, either natural or synthetic. Humans are able to judge whether an image is a good image. However, for many applications it would be faster and cheaper to estimate the quality of images using a computer. The major goal of this...

doctoral thesis 2004

document

A generic approach to the development of tactical decision aids

Neef, R.M. (author), te Brake, G.M. (author), TNO Fysisch en Elektronisch Laboratorium TNO Technische Menskunde (author)

conference paper 2003

document

Simulation of advanced concepts for damage control

Gillis, M.P.W. (author), Keijer, W. (author), Smit, C.S. (author), Wolff, P.A. (author), TNO Fysisch en Elektronisch Laboratorium TNO Prins Maurits Laboratorium (author)

Damage control on board navy ships requires a lot of manpower. On a frigate-sized ship of the Royal Netherlands Navy, up to ninety people can be involved in tasks like fire fighting, battle damage repair and treatment of casualties. In present times this is no longer attainable or affordable. To reduce our manning needs, several tasks will have...

conference paper 2003

document

Design issues of an open scalable architecture for active phased array radars

Huizing, A.G. (author), TNO Fysisch en Elektronisch Laboratorium TNO (author)

An open scalable architecture will make it easier and quicker to adapt active phased array radar to new missions and platforms. This will provide radar manufacturers with larger markets, more commonality in radar systems, and a better continuity in radar production lines. The procurement of open scalable active phased array radars becomes...

conference paper 2003

document

Advanced concept for damage control: A framework to simulate fire propagation and damage control effects

Gillis, M.P.W. (author), Keijer, W. (author), Smit, C.S. (author), TNO Fysisch en Elektronisch Laboratorium TNO Prins Maurits Laboratorium (author)

Current damage control procedures are developed on the basis of a long-standing experience. However there are reasons to believe that these procedures do not account for major weapon-induced calamities. Fire fighting after substantial blast and fragmentation damage, due to a weaponhit, is quite beyond the scenarios encountered during training...

article 2003

document

CAD of coaxially end-fed waveguide phased-array antennas

TNO Fysisch en Elektronisch Laboratorium TNO Industrie en Techniek (author), Galdi, V. (author), Gerini, G. (author), Guglielmi, M. (author), Visser, H.J. (author), D'Agostino, F. (author)

An alternative configuration for an infinite coaxially end-fed waveguide phased-array antenna is explored. In the proposed configuration, the integration of the end-fed launcher and the output waveguide, rather than the waveguide in itself, acts as a basic radiator. This allows the design of more compact antenna elements. In order to analyze and...

article 2002

document

TOP E-learning

TNO Technische Menskunde Fysisch en Elektronisch Laboratorium TNO (author)

other 2002

document

Visual interpretation of polarimetric SAR imagery

TNO Fysisch en Elektronisch Laboratorium TNO Technische Menskunde (author), van den Broek, A.C. (author), Smith, A.J.E. (author), Toet, A. (author)

A study is presented in which several different representations of polarimetric SAR data for visual interpretation are evaluated. Using a group of observers the tasks 'land use classification' and 'object detection' were examined. For the study, polarimetric SAR data were used with a resolution of 3 meters. These data were obtained with the...

conference paper 2001

document

Comparison between satellite retrieved aerosol optical thickness and results obtained from the LOTOS model

Robles Gonzales, C. (author), de Leeuw, G. (author), van Loon, M. (author), Schaap, M. (author), Builtjes, P.J.H. (author), TNO Fysisch en Elektronisch Laboratorium TNO Milieu, Energie en Procesinnovatie (author)

Aerosols affect the Earth radiation balance by absorbing and scattering solar radiation and changing the albedo and the lifetime of clouds. Aerosols also play a role in health-related problems. The aerosol lifetime varies from a few days 10 about a week and their quite strong but rather Iocalised sources produce highly variable aerosol...

article 2000

document

Automatic Characterization of Electro-Optical Sensors with Image Processing, using the Triangle Orientation Discrimination (TOD) Method

TNO Fysisch en Elektronisch Laboratorium TNO Technische Menskunde (author), de Lange, D.J. (author), Valeton, J.M. (author), Bijl, P. (author)

The objective characterization of electro-optical sensors and that of image enhancement techniques has always been a difficult task. Up to now the sensor is characterized using the minimum resolvable temperature difference (MRTD) or the minimum resolvable contrast (MRC). The performance of image enhancement techniques is done by visual...

conference paper 2000

document

Kennismanagement en kennistechnologie

Aarts, M.F.A. (author), Boehmer, R.L. (author), Schilstra, K.O. (author), Spronck, P.H.M. (author), TNO Fysisch en Elektronisch Laboratorium TNO Bouw (author)

Kennis bevindt zich in hoofden van mensen en is dus per definitie impliciet. Hoewel kennismanagement daarom in principe geen technologische aangelegenheid is, kunnen technologieën wel een essentieel onderdeel zijn van de uitvoering ervan. Voor bepaalde vormen van uitwisseling, opslag en structurering van expliciete kennis is...

article 1999

document

Virtuele omgevingen

Lotens, W. (author), Visser, H. (author), van der Berg, M. (author), Dumay, A.C.M. (author), TNO Fysisch en elektronisch laboratorium TNO Technische menskunde (author)

bookPart 1996

document

Peaks in the Frequency Response of Hearing Aids: Evaluation of the Effects on Speech Intelligibility and Sound Quality

van Buuren, R.A. (author), Festen, J.M. (author), Houtgast, T. (author), TNO Fysisch en Elektronisch Laboratorium TNO Technische Menskunde (author)

In a series of experiments, we introduced peaks of 10, 20, and 30 dB, in various combinations, onto a smooth reference frequency response. For each of the conditions, we evaluated speech intelligibility in noise, using a test as developed by Plomp and Mimpen (1979), and sound quality (for both speech and music), using a rating-scale procedure....

article 1996

document

Multiple hypothesis clustering in radar plot extraction

Huizing, A.G. (author), Theil, A. (author), van Dorp, Ph. (author), Ligthart, L.P. (author), TNO Fysisch en Elektronisch Laboratorium TNO (author)

False plots and plots with inaccurate range and Doppler estimates may severely degrade the performance of tracking algorithms in radar systems. This paper describes how a multiple hypothesis clustering technique can be applied to mitigate the problems involved in plot extraction. The measures of confidence for each hypothesis are based on fuzzy...

conference paper 1995

document

Experimental Evaluation of Camouflage Effectiveness in the Thermal Infrared

Jacobs, P.A.M. (author), Fysisch en Elektronisch Laboratorium TNO (author)

The detectability of a target ln the infrared spectral region ls determined by differences between the radiative stignatures of the target and the local background. This implies that both, the difference in surface temperature and emissivity ^T resp. ^€ and the distribution of these differences over the target area and the background, are of...

conference paper 1993

document

Analyse CHT-screeningsproces bij pasgeborenen: Een pilot-onderzoek naar mogelijkheden ter versnelling van de doorlooptijd van de screening

Fysisch en Elektronisch Laboratorium TNO Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author), Leermakers, H.A.F. (author), van den Oudenrijn, C. (author), Verkerk, P.H. (author), Hontelez, J.A.M. (author)

report 1993

document

Image enhancement and moving target detection in IR image sequences

Fysisch en Elektronisch Laboratorium TNO (author), Beck, W. (author)

Results are presented of noise reduction by motion compensated temporal filtering in a noisy IR image sequence and of moving target detection in an air-to-ground IR image sequence. In the case of motion compensated temporal filtering our approach consists of estimating the optical flow between successive frames and subsequently averaging a small...

conference paper 1993

document

Recent developments in constructing of fast-pulse generators (abstract)

Fysisch en Elektronisch Laboratorium TNO (author), Middelkoop, R. (author), Pont, W. (author)

conference paper 1993