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den Hollander, R.J.M. (author), van Rooij, S.B. (author), van den Broek, S.P. (author), Dijk, J. (author)
An important surveillance task during naval military operations is early risk assessment of vessels. The potential risk that a vessel poses will depend on the vessel type, and vessel classification is therefore a basic technique in risk assessment. Although automatic identification by AIS is widely available, the AIS transponders can potentially...
conference paper 2021
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van Rest, J.H.C. (author), Attema, T. (author), Timan, T. (author), den Hollander, R.J.M. (author), van Voorthuisen, G.P. (author)
report 2021
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Dijk, J. (author), van den Broek, S.P. (author), den Hollander, R.J.M. (author), Baan, J. (author), ten Hove, J.M. (author), Oorbeek, D. (author)
conference paper 2021
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den Hollander, R.J.M. (author), Adhikari, A. (author), Tolios, I. (author), van Bekkum, M. (author), Bal, A. (author), Hendriks, S. (author), Kruithof, M.C. (author), Gross, D. (author), Jansen, N. (author), Perez, G. (author), Buurman, K. (author), Raaijmakers, S.A. (author)
conference paper 2020
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van den Hoogen, B. (author), Uijens, W. (author), den Hollander, R. (author), Huizinga, W. (author), Dijk, J. (author), Schutte, K. (author)
Automatic detection and tracking of persons and vehicles can greatly increase situational awareness in many military applications. Various methods for detection and tracking have been proposed so far, both for rule-based and learning approaches. With the advent of deep learning, learning approaches generally outperform rule-based approaches. Pre...
conference paper 2020
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Pruim, R.H.R. (author), van Opbroek, A. (author), Kruithof, M.C. (author), den Hollander, R.J.M. (author), Baan, J. (author), van den Broek, S.P. (author), van der Stap, N. (author), Dijk, J. (author)
Automatic detection and tracking of maritime targets in imagery can greatly increase situation awareness on naval vessels. Various methods for detection and tracking have been proposed so far, both for reasoning as well as for learning approaches. Learning approaches have the promise to outperform reasoning approaches. They typically detect...
conference paper 2019
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Huizinga, W. (author), van Opbroek, A.G. (author), Raimon, H.R. (author), Pruim, R.H.R. (author), den Hollander, R.J.M. (author), van den Broek, S.P. (author), van den Schook, E.S. (author), Schutte, K. (author), van den Stap, N. (author), Dijk, J. (author)
Imaging systems can be used to obtain situational awareness in maritime situations. Important tools for these systems are automatic detection and tracking of objects in the acquired imagery, in which numerous methods are being developed. When designing a detection or tracking algorithm, its quality should be ensured by a comparison with existing...
article 2019
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den Hollander, R.J.M. (author), van der Stap, N. (author), Wilmer, M.M.G. (author), Dijk, J. (author)
For military operations, the availability of high-quality imaging information from Electro-Optical / Infrared (EO/IR) sensors is of vital importance. This information can be used for timely detection and identification of threatening vessels in an environment with a large amount of neutral vessels. EO/IR sensors provide imagery of all vessels at...
conference paper 2019
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van der Stap, N. (author), van Opbroek, A.G. (author), Huizinga, W. (author), Wilmer, M.M.G. (author), van den Broek, S.P. (author), Pruim, R.H.R. (author), den Hollander, R.J.M. (author), Schutte, K. (author), Dijk, J. (author)
Detecting maritime targets with electro-optical sensors is an active area of research. One current trend is to automate target detection through image processing or computer vision. Automation of target detection will decrease the number of people required for lower-level tasks, which frees capacity for higher-level tasks. A second trend is that...
conference paper 2018
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den Hollander, R.J.M. (author), Bouma, H. (author), van Rest, J.H.C. (author), ten Hove, J.M. (author), ter Haar, F.B. (author), Burghouts, G.J. (author)
Video analytics is essential for managing large quantities of raw data that are produced by video surveillance systems (VSS) for the prevention, repression and investigation of crime and terrorism. Analytics is highly sensitive to changes in the scene, and for changes in the optical chain so a VSS with analytics needs careful configuration and...
conference paper 2017
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Forrester, B. (author), den Hollander, K. (author)
Social Media (SM) is a relatively new phenomenon. Intelligence agencies have been struggling to understand how to exploit the social pulse that flows from this source. The paper starts with a brief overview of SM with some examples of how it is being used by adversaries and how we might be able to exploit this usage. Often treated as another...
conference paper 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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Terhal, P.A. (author), Nievelstein, R.J.A.J. (author), Verver, E.J.J. (author), Topsakal, V. (author), van Dommelen, P. (author), Hoornaert, K. (author), le Merrer, M. (author), Zankl, A. (author), Simon, M.E. (author), Smithson, S.F. (author), Marcelis, C. (author), Kerr, B. (author), Clayton-Smith, J. (author), Kinning, E. (author), Mansour, S. (author), Elmslie, F. (author), Goodwin, L. (author), van der Hout, A.H. (author), Veenstra-Knol, H.E. (author), Herkert, J.C. (author), Lund, A.M. (author), Hennekam, R.C. (author), Mégarbané, A. (author), Lees, M.M. (author), Wilson, L.C. (author), Male, A. (author), Hurst, J. (author), Alanay, Y. (author), Annerén, G. (author), Betz, R.C. (author), Bongers, E.M. (author), Cormier-Daire, V. (author), Dieux, A. (author), David, A. (author), Elting, M.W. (author), van den Ende, J. (author), Green, A. (author), van Hagen, J.M. (author), Hertel, N.T. (author), Holder-Espinasse, M. (author), den Hollander, N. (author), Homfray, T. (author), Hove, H.D. (author), Price, S. (author), Raas-Rothschild, A. (author), Rohrbach, M. (author), Schroeter, B. (author), Suri, M. (author), Thompson, E.M. (author), Tobias, E.S. (author), Toutain, A. (author), Vreeburg, M. (author), Wakeling, E. (author), Knoers, N.V. (author), Coucke, P. (author), Mortier, G.R. (author)
Type 2 collagen disorders encompass a diverse group of skeletal dysplasias that are commonly associated with orthopedic, ocular, and hearing problems. However, the frequency of many clinical features has never been determined. We retrospectively investigated the clinical, radiological, and genotypic data in a group of 93 patients with...
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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Streefkerk, J.W. (author), Eikelboom, A. (author), Paulissen, R. (author), van Bemmel, I.E. (author), Hemmer, A.F. (author), Venrooij, W. (author), den Hollander, C.J. (author)
Military intelligence communities need to collect, process and disseminate information as quickly and efficiently as possible, for example in answering requests for information by commanders. Currently, the flow of information between the field and intelligence communities is hampered by disparities in the integration of the various components...
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 den Broek, S.P. (author), Bouma, H. (author), Veerman, H.E.T. (author), Benoist, K.W. (author), den Hollander, R.J.M. (author), Schwering, P.B.W. (author)
Long-term tracking is important for maritime situational awareness to identify currently observed ships as earlier encounters. In cases of, for example, piracy and smuggling, past location and behavior analysis are useful to determine whether a ship is of interest. Furthermore, it is beneficial to make this assessment with sensors (such as...
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
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van den Broek, S.P. (author), Bouma, H. (author), den Hollander, R.J.M. (author), Veerman, H.E.T. (author), Benoist, K.W. (author), Schwering, P.B.W. (author)
For maritime situational awareness, it is important to identify currently observed ships as earlier encounters. For example, past location and behavior analysis are useful to determine whether a ship is of interest in case of piracy and smuggling. It is beneficial to verify this with cameras at a distance, to avoid the costs of bringing an own...
conference paper 2014
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