Searched for: subject:"Clutter"
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document
Toet, A. (author), Hoogervorst, M.A. (author)
In military operations signature reduction techniques such as camouflage nets, low-emissive paints, and camouflage patterns are typically deployed to optimize the survivability of high value assets by minimizing their detectability. Various methods have been developed to assess the effectiveness of these camouflage measures. There are three main...
article 2020
document
Kooi, F.L. (author), Toet, A. (author), Hoving, S. (author)
Background. A Head Mounted Display (HMD) is unlike all other displays fixed to the head, making eye movements the sole option to scan the display. While the largest saccades easily exceed 50 deg (Collewijn et al., 1988), naturally occurring saccades typically stay within 15 degrees (Adler & Stark, 1975). While attractive for many applications, a...
public lecture 2019
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Devecchi, B.A. (author), Benoist, K.W. (author), Scheers, L.C.W. (author), Veerman, H.E.T. (author), Binsbergen, S.A. (author), van Eijk, A.M.J. (author)
Infrared imaging of the sea surface is used for many purposes, such as remote sensing of large oceanographic structures, environmental monitoring, surveillance applications and platform signature research. Many of these studies rely on determining the contrast of a target feature with its background and therefore benefit from accurately...
conference paper 2019
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Toet, A. (author), Hogervorst, M.A. (author)
In military operations signature reduction techniques such as camouflage nets, low-emissive paints, and camouflage patterns are typically deployed to optimize the survivability of high value assets by minimizing their detectability. Various methods have been developed to assess the effectiveness of these camouflage measures. There are three main...
article 2019
document
Toet, A. (author), Hogervorst, M.A. (author)
public lecture 2019
document
Kooi, F.L. (author), Toet, A. (author), Hoving, S. (author)
Background. A Head Mounted Display (HMD) is unlike all other displays fixed to the head, making eye movements the sole option to scan the display. While the largest saccades easily exceed 50 deg (Collewijn et al., 1988), naturally occurring saccades typically stay within 15 degrees (Adler & Stark, 1975). While attractive for many applications, a...
public lecture 2019
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Heiligers, M.J.C. (author), Huizing, A.G. (author)
conference paper 2018
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van Rossum, W. (author), Huizing, A. (author)
In a phased array radar which uses Multiple Input Multiple Output (MIMO) techniques, each (group of) element(s) transmits a different waveform. This extra degree of freedom in the design of a phased array radar potentially yields an advantage for improved suppression of sidelobe clutter and jamming. In this paper a Space-Time Block Coding (STBC)...
conference paper 2015
document
Toet, A. (author), Hogervorst, M.A. (author)
We present a new method to derive a multiscale urban camouflage pattern from a given set of background image samples. We applied this method to design a camouflage pattern for a given (semi-arid) urban environment. We performed a human visual search experiment and a computational evaluation study to assess the effectiveness of this multiscale...
article 2013
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Wasselin, J.-P. (author), Mazuel, S. (author), Itcia, E. (author), Huizing, A.G. (author), Theil, A. (author)
The ROCKWELL COLLINS France radar department is currently developing a FMCW radar system for the detection and the classification of small maritime targets in the frame of the SISMARIS, SARGOS & I2C projects. Several test campaigns have been conducted since 2009 to develop a sensor as well as an innovating signal processing chain which provides...
conference paper 2012
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Toet, A. (author)
The structural image similarity index (SSIM), introduced by Wang and Bovik (IEEE Signal Processing Letters 9-3, pp. 81-84, 2002) measures the similarity between images in terms of luminance, contrast en structure. It has successfully been deployed to model human visual perception of image distortions and modifications in a wide range of...
conference paper 2011
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Schwering, P.B.W. (author), Schutte, K. (author), TNO Defensie en Veiligheid (author)
Asymmetric threat assessment from military platforms, including early detection and classification by electro-optical means, is a complicated matter. These threats can be for instance explosives-packed rubber boats, minecarrying swimmers and divers in a marine environment or terrorists, improvised explosive devices and small vehicles in land or...
conference paper 2010
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Toet, A. (author), TNO Defensie en Veiligheid (author)
The recently introduced TSSIM clutter metric is currently the best predictor of human visual search performance for natural images (Chang and Zhang [1]). The TSSIM quantifies the similarity of a target to its background in terms luminance, contrast and structure. It correlates stronger with experimental mean search times and detection...
article 2010
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van der Heuvel, J.C. (author), Pace, P. (author), Steinvall, O. (author), TNO Defensie en Veiligheid (author)
article 2008
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Anitori, L. (author), Srinivasan, R. (author), Rangaswamy, M. (author), TNO Defensie en Veiligheid (author), IEEE (author)
In this paper the STAP detector based on the lowrank approximation of the normalized adaptive matched filter (LRNAMF) is investigated for its false alarm probability (FAP) performance. An exact formula for the FAP of the LRNAMF detector is derived using the g-method estimator [4]. The non CFAR behavior of this detector is shown via simulations...
conference paper 2008
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TNO Defensie en Veiligheid (author), van den Broek, S.P. (author), Bouma, H. (author), Degache, M.A.C. (author)
Operating in a coastal environment, with a multitude of boats of different sizes, detection of small extended targets is only one problem. A further difficulty is in discriminating detections of possible threats from alarms due to sea and coastal clutter, and from boats that are neutral for a specific operational task. Adding target features to...
conference paper 2008
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TNO Defensie en Veiligheid (author), Toet, A. (author), Wu, T. (author)
We present an algorithm that produces a fused false color representation of a combined multiband IR and visual imaging system for maritime applications. Multispectral IR imaging techniques are increasingly deployed in maritime operations, to detect floating mines or to find small dinghies and swimmers during search and rescue operations. However...
conference paper 2008
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Melief, H.W. (author), Greidanus, H. (author), van Genderen, P. (author), Hoogeboom, P. (author)
Abstract—In this paper three sets of high-resolution, coherent, and polarimetric radar sea clutter data are analyzed and compared with radar sea clutter models. The nature of the data allows a thorough analysis of the power, polarization and velocity of the sea clutter. It is shown that these quantities, especially the velocity, are good...
article 2006
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Melief, H.W. (author), Greidanus, H.S.F. (author), Hoogeboom, P. (author), van Genderen, P. (author), TNO Fysisch en Elektronisch Laboratorium (author)
A model for describing radar sea clutter is proposed. It consists of two parts, an oceanographic and an electromagnetic one. The former contains swell, small capillary and gravity waves as well as breaking wave events. The latter combines ray tracing, Bragg scattering and the Method of Moments. It is shown that the combination of the two models...
conference paper 2003
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Smith, A.J.E. (author), Gelsema, S.J. (author), Kester, L.J.H.M. (author), Melief, H.W. (author), Premel Cabic, G. (author), Theil, A. (author), Woudenberg, E. (author), TNO Fysisch en Elektronisch Laboratorium (author)
Doppler polarimetry in a surveillance radar for the maritime surface picture is considered. This radar must be able to detect low-RCS targets in littoral environments. Measurements on such targets have been conducted with a coherent polarimetric measurement radar in March 2001 and preliminary results from that campaign are presented. The system...
conference paper 2002
Searched for: subject:"Clutter"
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