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Neumann, N.M.P. (author), Knegjens, R. (author), Den Hollander, R. (author), Oggero, S. (author), Burghouts, G.J. (author), Van Den Broek, S.P. (author)Algorithms for the detection and tracking of objects can be combined into a system that automatically extracts relevant events from a large amount of video data. Such a system , can be particularly useful in video surveillance applications, notably to support analysts in retrieving information from hours of video while working under strict time...conference paper 2018
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Müller, W. (author), Kuwertz, A. (author), Grönwall, C. (author), Petersson, H. (author), Dekker, R. (author), Reinert, F. (author), Ditzel, M. (author)Experiences from recent conflicts show the strong need for smart sensor suites comprising different multi-spectral imaging sensors as core elements as well as additional non-imaging sensors. Smart sensor suites should be part of a smart sensor network - A network of sensors, databases, evaluation stations and user terminals. Its goal is to...conference paper 2017
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Tynes, T. (author), Aagestad, C. (author), Vester Thorsen, S. (author), Andersen, L.L. (author), Perkio-Makela, M. (author), García, F.J.P. (author), Blanco, L.. (author), Vermeylen, G. (author), Parent-Thirion, A. (author), Hooftman, W. (author), Houtman, I.L.D. (author), Liebers, F. (author), Burr, H. (author), Formazin, M. (author)Background. The prevalence of workers with demanding physical working conditions in the European work force remains high, and occupational physical exposures are considered important risk factors for musculoskeletal disorders (MSD), a major burden for both workers and society. Exposures to physical workloads are therefore part of the European...article 2017
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Schutte, K. (author), Burghouts, G. (author), van der Stap, N. (author), Westerwoudt, V.L. (author), Bouma, H. (author), Kruithof, M.C. (author), Baan, J. (author), ten Hove, R.J.M. (author)The bottleneck in situation awareness is no longer in the sensing domain but rather in the data interpretation domain, since the number of sensors is rapidly increasing and it is not affordable to increase human data-analysis capacity at the same rate. Automatic image analysis can assist a human analyst by alerting when an event of interest...conference paper 2016
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van de Kuijt, J.T. (author)Onlangs heeft minister Hennis-Plasschaert het belang aangekaart van het vervangen van de Walrus-klasse onderzeeboot. De minister onderkent in haar visie dat de onderzeeboot zeer geschikt is voor het verzamelen, analyseren en delen van inlichtingen. Dit artikel gaat in op de inlichtingentaak van de Nederlandse onderzeeboot. Uit onderzoek blijkt...article 2016
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Lefter, I. (author), Burghouts, G.J. (author), Rothkrantz, L.J.M. (author)This paper investigates how speech and gestures convey stress, and how they can be used for automatic stress recognition. As a first step, we look into how humans use speech and gestures to convey stress. In particular, for both speech and gestures, we distinguish between stress conveyed by the intended semantic message (e.g. spoken words for...article 2016
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Bouma, H. (author), Burghouts, G.J. (author), den Hollander, R.J.M. (author), van der Zee, S. (author), Baan, J. (author), ten Hove, R.J.M. (author), van Diepen, C.J. (author), van den Haak, W.P. (author), van Rest, J. (author)Deception detection is valuable in the security domain to distinguish truth from lies. It is desirable in many security applications, such as suspect and witness interviews and airport passenger screening. Interviewers are constantly trying to assess the credibility of a statement, usually based on intuition without objective technical support....conference paper 2016
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Toet, A. (author), Hogervorst, M.A. (author)We introduce a multiscale image fusion scheme based on guided filtering. Guided filtering can effectively reduce noise while preserving detail boundaries. When applied in an iterative mode, guided filtering selectively eliminates small scale details while restoring larger scale edges. The proposed multi-scale image fusion scheme achieves optimal...conference paper 2016
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Wijn, R. (author), Vogels, J. (author)Dit artikel laat zien dat het combineren van observaties van afwijkend gedrag door meerdere toezichthouders leidt tot betere oordelen over mogelijke kwaadwillige intenties dan oordelen van individuele toezichthouders. In de hier beschreven studie bekeken ervaren toezichthouders CCTV-beelden van een winkelcentrum waarin zakkenrollers actief waren...article 2015
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Evers, L. (author), Barros, A.I. (author), Monsuur, H. (author), Wagelmans, A. (author)Unmanned Aerial Vehicles (UAVs) are important assets for information gathering in Intelligence Surveillance and Reconnaissance (ISR) missions. Depending on the uncertainty in the planning parameters, the complexity of the mission and its constraints and requirements, different planning methods might be preferred. The first two planning...bookPart 2015
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de Klerk, W.P.C. (author)The surveillance of gun propellants is basically performed either by an investigation into the thermal behavior of the propellant or by the determination of its remaining effective stabilizer content. Over the years it is shown that the surveillance of NC based gun propellants is necessary. NC based materials are intrinsically unstable, and can...article 2015
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Bouma, H. (author), Baan, J. (author), ter Haar, F.B. (author), Eendebak, P.T. (author), den Hollander, R.J.M. (author), Burghouts, G.J. (author), Wijn, R. (author), van den Broek, S.P. (author), van Rest, J.H.C. (author)In the security domain, cameras are important to assess critical situations. Apart from fixed surveillance cameras we observe an increasing number of sensors on mobile platforms, such as drones, vehicles and persons. Mobile cameras allow rapid and local deployment, enabling many novel applications and effects, such as the reduction of violence...conference paper 2015
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den Hollander, R.J.M. (author), Bouma, H. (author), Baan, J. (author), Eendebak, P.T. (author), van Rest, J.H.C. (author)Person tracking across non-overlapping cameras and other types of video analytics benefit from spatial calibration information that allows an estimation of the distance between cameras and a relation between pixel coordinates and world coordinates within a camera. In a large environment with many cameras, or for frequent ad-hoc deployments of...conference paper 2015
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Lefter, I. (author), Burghouts, G.J. (author), Rothkrantz, L.J.M. (author)Stressful situations are likely to occur at human operated service desks, as well as at human-computer interfaces used in public domain. Automatic surveillance can help notifying when extra assistance is needed. Human communication is inherently multimodal e.g. speech, gestures, facial expressions. It is expected that automatic surveillance...article 2014
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Nooij, P.N.C. (author), Theil, A. (author)Blake chart computations are widely employed to rank detection coverage capabilities of competitive search radar systems. Developed for comparable 2D radar systems with a mechanically rotating reflector antenna, it was not necessary to regard update rate and plot quality in Blake's chart. To characterize the system's critical awareness, the...conference paper 2014
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Formazin, M. (author), Burr, H. (author), Aagestad, C. (author), Tynes, T. (author), Thorsen, S.V. (author), Perkio-Makela, M. (author), Díaz Aramburu, C.I. (author), Pinilla García, F.J. (author), Galiana Blanco, L. (author), Vermeylen, G. (author), Parent-Thirion, A. (author), Hooftman, W. (author), Houtman, I.L.D. (author)Background.In most countries in the EU, national surveys are used to monitor working conditions and health. Since the development processes behind the various surveys are not necessarily theoretical, but certainly practical and political, the extent of similarity among the dimensions covered in these surveys has been unclear. Another interesting...article 2014
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Evers, L. (author), Barros, A.I. (author), Monsuur, H. (author), Wagelmans, A.P.M. (author)Unmanned Aerial Vehicles (UAVs) have become an essential asset for military and law enforcement operations. In particular their use for surveillance and reconnaissance tasks has been growing due to the quick developments in the areal systems themselves, sensor technology, and image processing techniques that enable near-realtime acquisition of...bookPart 2014
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Sella, G. (author), Senzier, C. (author), Andersson, M. (author), Taberski, G. (author), Schutte, K. (author), Lohrmann, P. (author), Murray, E. (author), Nguyen, E. (author)The EU FP7 project ARENA addresses the design of a flexible surveillance system for detection and recognition of threats towards deployment on mobile critical assets such as trucks, trains, vessels and oil rigs..conference paper 2014
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Burghouts, G.J. (author), van Slingerland, P. (author), ten Hove, R.J.M. (author), den Hollander, R.J.M. (author), Schutte, K. (author)Theft of cargo from a truck or attacks against the driver are threats hindering the day to day operations of trucking companies. In this work we consider a system, which is using surveillance cameras mounted on the truck to provide an early warning for such evolving threats. Low-level processing involves tracking people and calculating motion...conference paper 2014
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van Huis, J.R. (author), Bouma, H. (author), Baan, J. (author), Burghouts, G.J. (author), Eendebak, P.T. (author), den Hollander, R.J.M. (author), Dijk, J. (author), van Rest, J.H.C. (author)Automatic detection of abnormal behavior in CCTV cameras is important to improve the security in crowded environments, such as shopping malls, airports and railway stations. This behavior can be characterized at different time scales, e.g., by small-scale subtle and obvious actions or by large-scale walking patterns and interactions between...conference paper 2014