Searched for: subject%3A%22Target%255C%2Bdetection%22
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Brouwer, A.M. (author), Hogervorst, M.A.J. (author), Oudejans, B. (author), Ries, A.J. (author), Touryan, J. (author)
In a visual search task, we compared electroencephalography (EEG) and eye-tracking features following saccades on targets that were subsequently reported (hits) and targets that were not (misses). Previous work showed similar saccade-related potentials (SRPs) between missed targets and nontargets, but in that work targets were probably not...
bookPart 2018
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Brouwer, A.M. (author), Hogervorst, M.A. (author), Oudejans, B.A. (author), Ries, A.J. (author), Touryan, J. (author)
EEG and eye tracking variables are potential sources of information about the underlying processes of target detection and storage during visual search. Fixation duration, pupil size and event related potentials (ERPs) locked to the onset of fixation or saccade (saccade-related potentials, SRPs) have been reported to differ dependent on whether...
article 2017
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Dol, H.S. (author)
The timely detection of small hazardous objects at the sea surface, such as drifting mines, is challenging for ship-mounted sensor systems, both for underwater sensor systems like sonar and above-water sensor systems like radar and electro-optics (lidar, infrared/visual cameras). This is due to the low target echo strength and radar/lidar cross...
conference paper 2014
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Nijhoff, M.J.J. (author)
Current methods of automatic target detection and classification using low- to mid- frequency sonar are based on correlating the measured Target In the Environment Response (TIER) of potential targets with the TIERs in a database of known objects. Obtaining experimental TIER measurements of proud, partially and fully buried objects to populate...
conference paper 2014
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Anitori, L. (author), Maleki, A. (author), Otten, M.P.G. (author), Baraniuk, R.G. (author), Hoogeboom, P. (author)
We consider the problem of target detection from a set of Compressed Sensing (CS) radar measurements corrupted by additive white Gaussian noise. We propose two novel architectures and compare their performance by means of Receiver Operating Characteristic (ROC) curves. Using asymptotic arguments and the Complex Approximate Message Passing (CAMP)...
article 2013
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Nijhof, M.J.J. (author), Espana, A. (author), Williams, K. (author)
An efficient model for the Target In Environment Response (TIER) of buried/half buried, mine-like objects and UXOs is essential for the development and training of automatic target detection and classification methods and for use in sonar performance prediction models. For instance, to investigate the influence of burial depth and orientation on...
conference paper 2013
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Hancock, P.A. (author), Mercado, J.E. (author), Merlo, J. (author), van Erp, J.B.F. (author)
The present experiment tested 60 individuals on a multiple screen, visual target detection task. Using a within-participant design, individuals received no-cue augmentation, an augmenting tactile cue alone, an augmenting auditory cue alone or both of the latter augmentations in combination. Results showed significant and substantive improvements...
article 2013
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van Vossen, R. (author), van der Spek, E. (author), Beerens, S.P. (author)
Existing sonar systems are commonly deployed at a low duty cycle, i.e. a short transmit signal is used followed by a long listening time. As a result, the target is only illuminated during a short time resulting in only one detection opportunity per ping. When a sonar system is capable of recording meaningful data during its transmission, one...
conference paper 2011
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de Jong, A.N. (author), van Eijk, A.M.J. (author), Cohen, L.H. (author), Fritz, P.J. (author), Gunter, W.H. (author), Vrahimisb, G. (author), Faith, J. (author)
The FATMOSE trial (False Bay Atmospheric Experiment) is a continuation of the cooperative work between TNO and IMT on atmospheric propagation and point target detection and identification in a maritime environment (South Africa). The atmospheric transmission, being of major importance for target detection, was measured with the MSRT multiband...
conference paper 2011
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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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TNO Defensie en Veiligheid (author), van Eijk, A.M.J. (author), Degache, M.A.C. (author), de Lange, D.J.J. (author), Hammel, S.M. (author), Tsintikidis, D.S. (author)
The FATMOSE trial (FAlse-bay ATMOSpheric Experiment) running over a period from November 2009 to July 2010, was a continuation of the cooperation between TNO and IMT on atmospheric propagation and point target detection and identification in a maritime environment. Instruments were installed for measuring scintillation, blurring- and refraction...
conference paper 2010
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Deiana, D. (author), Yarovoy, A. (author), TNO Defensie en Veiligheid (author)
In this paper a texture feature coding method to be applied to high-resolution 3D radar images in order to improve target detection is developed. An automatic method for image segmentation based on texture features is proposed. The method has been able to automatically detect weak targets which failed to be detected with intensity based...
conference paper 2009
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Hoogeboom, P. (author), Elferink, F.H. (author), Trampuz, C. (author), TNO Defensie en Veiligheid (author)
For the detection and tracking of a football on a playground, a transponder was developed on a flexible substrate suitable for integration in the ball. The transponder secures permanent detection and identification with FMCW radar, thus enabling an easy and cost-effective tracking of the ball. The transponder consists of a dipole antenna and a...
conference paper 2009
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TNO Defensie en Veiligheid (author), Hogervorst, M.A. (author), Toet, A. (author)
We designed and evaluated a dual-band Night Vision Goggles sensor system. The sensor system consists of two optically aligned NVGs fitted with filters splitting the sensitive range into a visual and a near-infrared band. The Color-the-night technique (Hogervorst & Toet, FUSION2008) was used to fuse the images of the two sensors, using a color...
conference paper 2009
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TNO Defensie en Veiligheid (author), de Jong, A.N. (author), Schwering, P.B.W. (author), Fritz, P.J. (author), Gunter, W.H. (author)
During the False Bay trial (June 2007), the performance of a set of three optical sensors was tested against several small surface targets in a coastal area: a hyperspectral camera, a camera with a rotating polarization filter and a high resolution camera. One objective was the validation of a contrast and clutter model for the visual spectral...
conference paper 2009
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TNO Defensie en Veiligheid (author), Toet, A. (author), Hogervorst, M.A. (author)
We present a new Tri-band Color Low-light Observation (TRICLOBS) system The TRICLOBS is anall-day all-weather surveillance and navigation tool. Its sensor suite consists of two digital image intensifiers and an uncooled longwave infrared microbolometer. This sensor suite registers the visual, near-infrared and longwave infrared bands of the...
conference paper 2009
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TNO Defensie en Veiligheid (author), Dijk, J. (author), van Eekeren, A.W.M. (author), Schutte, K. (author), de Lange, D.J.J. (author), van Vliet, L.J. (author)
When bright moving objects are viewed with an electro-optical system at very long range, they will appear as small slightly blurred moving points in the recorded image sequence. Detection of point targets is seriously hampered by structure in the background, temporal noise and aliasing artifacts due to undersampling by the infrared (IR) sensor....
conference paper 2009
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van Vossen, R. (author), te Raa, L.A. (author), Blacquière, G. (author)
The objective of sonar processing is to enhance the signal received from the target with respect to noise or clutter in order to enhance detection, classification and localisation. Range-bearing information is commonly obtained through beamforming and matched-filtering of data acquired with a densely sampled detector array. The source sampling,...
conference paper 2009
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TNO Defensie en Veiligheid (author), van den Heuvel, J.C. (author), van Putten, F.J.M. (author), Cohen, L.H. (author), Kemp, R.A.W. (author), Franssen, G.C. (author)
Coastal surveillance and naval operations in the littoral both have to deal with the threat of small sea-surface targets. These targets have a low radar cross-section and a low velocity that makes them hard to detect by radar. Typical threats include jet skis, FIAC's, and speedboats. Previous lidar measurements at the coast of the Netherlands...
conference paper 2009
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TNO Defensie en Veiligheid (author), Hogervorst, M.A. (author), Toet, A. (author)
We have tested a prototype dual-band NVG system consisting of two NVGs fitted with filters that split the NVG sensitive range into a short (visual) and a long wavelength (NIR) band. The Color-the-night technique (see Hogervorst & Toet, SPIE D&S ‘08) was used to fuse the images of the two sensors. We designed a color scheme especially optimized...
conference paper 2009
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