Searched for: subject%3A%22face%22
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van de Pol, J. (author), van Braak, M. (author), Pennings, H.J.M. (author), van Vondel, S. (author), Steenbeek, H. (author), Akkerman, S. (author)
The pervasive phenomenon of adaptivity in face-to-face interaction is described inconsistently, using numerous concepts (e.g. lignment/attunement/complementarity/imitation/reciprocity/scaffolding/synchrony), impeding the streamlining of adaptivity research. We explored 33 adaptivity concepts and various adaptivity theories from different fields....
article 2022
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Numan, N. (author), Haar, F.T. (author), Cesar, P. (author)
Head-mounted displays (HMDs) are an essential display device for the observation of virtual reality (VR) environments. However, HMDs obstruct external capturing methods from recording the user’s upper face. This severely impacts social VR applications, such as teleconferencing, which commonly rely on external RGB-D sensors to capture a...
conference paper 2021
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van der Burg, E. (author), Rhodes, G. (author), Alais, D. (author)
Recent findings from several groups have demonstrated that visual perception at a given moment can be biased toward what was recently seen. This is true both for basic visual attributes and for more complex representations, such as face identity, gender, or expression. This assimilation to the recent past is a positive serial dependency, similar...
article 2019
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Kok, R. (author), van der Burg, E. (author), Rhodes, G. (author), Alias, D. (author)
Studies suggest that familiar faces are processed in a manner distinct from unfamiliar faces and that familiarity with a face confers an advantage in identity recognition. Our visual system seems to capitalize on experience to build stable face representations that are impervious to variation in retinal input that may occur due to changes in...
article 2017
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Comaschi, F. (author), Stuijk, S. (author), Basten, T. (author), Corporaal, H. (author)
The problem of online face tracking from unconstrained videos is still unresolved. Challenges range from coping with severe online appearance variations to coping with occlusion. We propose RFTD (Robust Face Tracking-by-Detection), a system which combines tracking and detection into a single framework to robustly track a face from unconstrained...
conference paper 2016
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van Beijsterveldt, A.M.C. (author), Stubbe, J.H. (author), Schmikli, S.L. (author), van de Port, I.G.L. (author), Backx, F.J.G. (author)
Objectives: To compare the incidence and characteristics of injuries between Dutch amateur and professional male soccer players during one entire competition season. Design: A prospective two-cohort design. Methods: During the 2009-2010 season, 456 Dutch male amateur soccer players and 217 professional players were prospectively followed....
article 2015
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Comaschi, F. (author), Stuijk, S. (author), Basten, A.A. (author), Corporaal, H. (author)
Online detection and tracking of a variable number of faces in video is a crucial component in many real-world applications ranging from video-surveillance to online gaming. In this paper we propose FAST-DT, a fully automated system capable of detecting and tracking a variable number of faces online without relying on any scene-specific cues....
conference paper 2015
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Tangelder, J.W.H. (author), Lebert, E. (author), Burghouts, G.J. (author), van Zon, K. (author), Den Uyl, M.J. (author)
This paper presents a novel approach to detect persons in video by combining optical flow based motion analysis and silhouette based recognition. A new fast optical flow computation method is described, and its application in a motion based analysis framework unifying human tracking and detection is outlined. Our optical flow algorithm...
conference paper 2014
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Khan, M.U. (author), Justice, J. (author), Boersma, A. (author), Mourad, M. (author), van Ee, R.J. (author), van Blaaderen, A. (author), Wijnhoven, J. (author), Corbett, B. (author)
We present designs for sharp bends in polymer waveguides using colloidal photonic crystal (PhC) structures. Both silica (SiO2) sphere based colloidal PhC and core-shell colloidal PhC structures having a titania (TiO 2) core inside silica (SiO2) shells are simulated. The simulation results show that core-shell Face Centered Cubic (FCC) colloidal...
conference paper 2014
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Verreault, J. (author), Higgins, A.J. (author), Stowe, R.A. (author)
The structure of oblique detonation waves stabilized on a hypersonic wedge in mixtures characterized by a large activation energy is investigated via steady method of characteristics (MoC) calculations and unsteady computational flowfield simulations. The steady MoC solutions show that, after the transition from shock-induced combustion to an...
conference paper 2013
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Alferdinck, J.W.A.M. (author), Hogervorst, M.A. (author)
Light sources that are optimized for mesopic vision contain a relatively high amount of bluish light (high S/P-ratio) and are therefore effective for peripheral visual tasks at mesopic light levels. Since the spectra of these light sources differ strongly from the common public lighting there were doubts on the performance of these light sources...
conference paper 2013
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van Deventer, M.O. (author), de Wit, J.J. (author), Vanattenhoven, J. (author), Guelbahar, M. (author)
This paper presents insights and learning experiences on the development of an integrated group recommender system in the European FP7 HBBNext research project. The system design incorporates insights from user research and evaluations, media industry players, and European HbbTV standardization efforts. Important differences were found between...
conference paper 2013
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Philippens, M.M.G.M. (author), Forbes, P.A. (author), Wismans, J.S.H.M. (author), DeWeese, R. (author), Moorcroft, D. (author)
This report documents research started in 2002 that identified the potential need for explicit neck injury criteria and tolerances for certification of side-facing seats in aircraft. Laboratory sled tests with full-body postmortem human subjects proved that there is a substantial risk for serious (potentially lethal) neck injuries under...
report 2011
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Schavemaker, J.G.M. (author), Eendebak, P.T. (author), van Staalduinen, M. (author), Kraaij, W. (author)
The TNO instance search submission to TRECVID 2011 consisted of three different runs: one is using an exhaustive keypoint search, one is using a bag-of-visual-words approach and one is using open-source face-recognition software. Our run approaches: Briefly, what approach or combination of approaches did you test in each of your submitted runs?...
conference paper 2011
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Schavemaker, J.G.M. (author), Doets, P.J. (author), Raaijmakers, S.A. (author), van Staalduinen, M. (author), Kraaij, W. (author)
conference paper 2011
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Lubelli, B.A. (author), Nijland, T.G. (author), van Hees, R.P.J. (author), Hacquebord, A. (author), TNO Bouw en Ondergrond (author)
Salt crystallization is a common cause of damage to porous building materials. Recent research has shown that some chemical compounds may inhibit salt crystallization or alter the mode of crystallization, thus limiting salt damage development, provided that the inhibitor was introduced prior to salt crystallization. In this paper, a pilot study...
article 2010
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Ter Haar, F.B. (author), Veltkamp, R.C. (author), TNO Defensie en Veiligheid (author)
Morphable face models have proven to be an effective tool for 3D face modeling and face recognition, but the extension to 3D face scans with expressions is still a challenge. The two main difficulties are (1) how to build a new morphable face model that deals with expressions, and (2) how to fit this morphable face model automatically to new 3D...
article 2010
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Looije, R. (author), Melder, W.A. (author), Neerincx, M.A. (author), TNO Defensie en Veiligheid (author)
Learning a process control task, such as tactical picture compilation in the Navy, is difficult, because the students have to spend their limited cognitive resources both on the complex task itself and the act of learning. In addition to the resource limits, motivation can be reduced when learning progress is slow. Intelligent Virtual Agents may...
conference paper 2008
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van Leeuwen, D.A. (author), Truong, K.P. (author), TNO Defensie en Veiligheid (author)
This paper introduces a detection methodology for recognition technologies in speech for which it is dif cult to obtain an abundance of non-target classes. An example is language recognition, where we would like to be able to measure the detection capability of a single target language without confounding with the modeling capability of non...
conference paper 2007
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Veltman, J.A. (author), Vos, W.K. (author), TNO Defensie en Veiligheid (author)
We conducted an experiment to explore the relation between facial temperature and mental effort. Participants had to perform mentally demanding tasks while their face was captured with an infrared camera. The temperature of the nose decreased during these tasks and increased during the successive rest blocks. Other parts of the face did not...
conference paper 2005
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