Searched for: author:"den Hollander, R.J.M."
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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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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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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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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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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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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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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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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 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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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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Dijk, J. (author), van Eekeren, A.W.M. (author), Toet, A. (author), den Hollander, R.J.M. (author), Schutte, K. (author), van Heijningen, A.W.P. (author), Bijl, P. (author)
For many military operations, situational awareness is of great importance. During night conditions, this situational awareness can be improved using both analog and digital image-intensified cameras. The quality of image intensifiers is a topic of interest. One of the differences between a digital and analog system is noise behavior. For...
article 2013
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Bouma, H. (author), Azzopardi, G. (author), Spitters, M.M. (author), de Wit, J.J. (author), Versloot, C.A. (author), van der Zon, R.W.L. (author), Eendebak, P.T. (author), Baan, J. (author), ten Hove, R.J.M. (author), van Eekeren, A.W.M. (author), ter Haar, F.B. (author), den Hollander, R.J.M. (author), van Huis, R.J. (author), de Boer, M.H.T. (author), van Antwerpen, G. (author), Broekhuijsen, B.J. (author), Daniele, L.M. (author), Brandt, P. (author), Schavemaker, J.G.M. (author), Kraaij, W. (author), Schutte, K. (author)
We describe the TNO system and the evaluation results for TRECVID 2013 Multimedia Event Detection (MED) and instance search (INS) tasks. The MED system consists of a bag-of-word (BOW) approach with spatial tiling that uses low-level static and dynamic visual features, an audio feature and high-level concepts. Automatic speech recognition (ASR)...
conference paper 2013
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Eendebak, P.T. (author), van Eekeren, A.W.M. (author), den Hollander, R.J.M. (author)
We present a robust method for landing zone selection using obstacle detection to be used for UAV emergency landings. The method is simple enough to allow real-time implementation on a UAV system. The method is able to detect objects in the presence of camera movement and motion parallax. Using the detected obstacles we select a safe landing...
conference paper 2013
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Burghouts, G.J. (author), Schutte, K. (author), Bouma, H. (author), den Hollander, R.J.M. (author)
In this paper, a system is presented that can detect 48 human actions in realistic videos, ranging from simple actions such as ‘walk’ to complex actions such as ‘exchange’. We propose a method that gives a major contribution in performance. The reason for this major improvement is related to a different approach on three themes: sample selection...
article 2013
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Bouma, H. (author), Burghouts, G.J. (author), de Penning, L. (author), Hanckmann, P. (author), ten Hove, R.J.M. (author), Korzec, S. (author), Kruithof, M.C. (author), Landsmeer, S. (author), van Leeuwen, C.J. (author), van den Broek, S.P. (author), Halma, A.H.R. (author), den Hollander, R.J.M. (author), Schutte, K. (author)
Ground surveillance is normally performed by human assets, since it requires visual intelligence. However, especially for military operations, this can be dangerous and is very resource intensive. Therefore, unmanned autonomous visual-intelligence systems are desired. In this paper, we present an improved system that can recognize actions of a...
conference paper 2013
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Bouma, H. (author), Borsboom, A.S. (author), den Hollander, R.J.M. (author), Landsmeer, S.H. (author), Worring, M. (author)
The capability to track individuals in CCTV cameras is important for surveillance and forensics alike. However, it is laborious to do over multiple cameras. Therefore, an automated system is desirable. In literature several methods have been proposed, but their robustness against varying viewpoints and illumination is limited. Hence performance...
conference paper 2012
Searched for: author:"den Hollander, R.J.M."
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