(1 - 20 of 38)

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Liu, Y. (author), Toet, A. (author), Krone, T. (author), van Stokkum, R. (author), Eijsman, S. (author), van Erp, J.B.F. (author)
The affective appraisal of odors is known to depend on their intensity (I), familiarity (F), detection threshold (T), and on the baseline affective state of the observer. However, the exact nature of these relations is still largely unknown. We therefore performed an observer experiment in which participants (N = 52) smelled 40 different odors ...
article 2020
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Toet, A. (author), van Schaik, M.G. (author)
In the current study participants explored a desktop virtual environment (VE) representing a suburban neighborhood with signs of public disorder (neglect, vandalism and crime), while being exposed to either room air (control group), or subliminal levels of tar (unpleasant; typically associated with burned or waste material) or freshly cut grass ...
article 2013
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Toet, A. (author), Tak, S. (author)
Previous research has shown that perceived facial valence is biased toward background valence. Here, we examine whether background dominance also affects perceived facial dominance. In particular, we hypothesized that downward-pointing triangles, which are known to convey threat, would affect perceived facial dominance. Participants judged...
article 2013
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van Erp, J.B.F. (author), Toet, A. (author)
Touch is an essential channel in interpersonal and affective communication, yet most social agents currently lack the capability to touch the user. In this paper we show the credibility of three premises that make the case that providing touch capability to social robots will increase their effectiveness in communicating emotions, building trust...
conference paper 2013
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Toet, A. (author), Benoist, K.W. (author), van Lingen, J.N.J. (author), Schleijpen, H.M.A. (author)
There are many weapon systems in which a human operator acquires a target, tracks it and designates it. Optical countermeasures against this type of systems deny the operator the possibility to fulfill this visual task. We describe the different effects that result from stimulation of the human visual system with high intensity (visible) light,...
conference paper 2013
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Toet, A. (author), Houtkamp, J.M. (author), van der Meulen, R. (author)
We investigated whether manipulation of visual and auditory depth and speed cues can affect a user’s sense of risk for a low-cost nonimmersive virtual environment (VE) representing a highway environment with traffic incidents. The VE is currently used in an examination program to assess procedural knowledge of highway patrol officers. In its...
article 2013
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Hogervorst, M.A. (author), Toet, A. (author), Bijl, P. (author)
We investigate how human visual search performance with field of view (FOV) restrictions depends on scan speed, zoom factor, target location, and conspicuity. First, observers search a FOV that moves at a constant speed along a predefined path over a visual search scene (the field of regard, or FOR), and we measure the effects of scan speed,...
article 2013
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Toet, A. (author), van Erp, J.B.F. (author), Petrignani, F.F. (author), Dufrasnes, M.H. (author), Sahhashivan, A. (author)
We present the design of a haptic computer accessory that adds the experience of touch to online conversations. It enables dyads to exchange the physical experience of holding hands regardless of distance and location. Text, speech and video communication systems support the transmission of several nonverbal affective aspects of communication...
conference paper 2013
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Toet, A. (author), Hogervorst, M.A. (author)
We present a new method to derive a multiscale urban camouflage pattern from a given set of background image samples. We applied this method to design a camouflage pattern for a given (semi-arid) urban environment. We performed a human visual search experiment and a computational evaluation study to assess the effectiveness of this multiscale...
article 2013
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Tak, S. (author), Toet, L. (author)
Despite the availability of a broad range of newly developed multisensory displays and interaction techniques, multisensory interactive data representations are still not widely used. We argue that for complex information analysis multisensory data representations and multimodal interactivity are essential. By leveraging the benefits of the...
conference paper 2013
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Toet, A. (author), van Schaik, M.G. (author), Theunissen, N.C.M. (author)
Background : Desktop virtual environments (VEs) are increasingly deployed to study the effects of environmental qualities and interventions on human behavior and safety related concerns in built environments. For these applications it is essential that users appraise the affective qualities of the VE similar to those of its real world...
article 2013
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Tak, S. (author), Brouwer, A.M. (author), Toet, A. (author), van Erp, J.B.F. (author)
User-adaptive visualization aims to adapt visualized information to the needs and characteristics of the individual user. Current approaches deploy user personality factors, user behavior and preferences, and visual scanning behavior to achieve this goal. We argue that neurophysiological data provide valuable additional input for user-adaptive...
conference paper 2013
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Toet, A. (author), Tak, S. (author)
We investigated if simulated social disorder affects perceived facial valence in a desktop virtual environment. Both in real and virtual imagery signs of disorder negatively bias perceived facial valence.
conference paper 2013
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Toet, A. (author), Alferdinck, J.W.A.M. (author)
In this study we investigated the effectiveness of high power illuminators that are intended to be used as warning devices or non-lethal weapons to deny car drivers their view on the outside world through windscreens. The test is based on a measurement of the amount of veiling glare resulting when a high intensity light source hits a windscreen....
conference paper 2013
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Houtkamp, J.M. (author), Toet, A. (author), Bos, F.A. (author)
The authors added task-relevant sounds to a computer-mediated instructor in-the-loop virtual training for firefighter commanders in an attempt to raise the engagement and arousal of the users. Computer-mediated training for crew commanders should provide a sensory experience that is sufficiently intense to make the training viable and effective....
article 2012
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Hogervorst, M.A. (author), Jansen, C. (author), Toet, A. (author), Bijl, P. (author), Bakker, P.J. (author), Hiddema, A.C. (author), van Vliet, S.F. (author)
We present the design and evaluation of a new demonstrator rifle sight viewing system containing direct view, red aim point and fusion of an (uncooled, LWIR) thermal sensor with a digital image intensifier. Our goal is to create a system that performs well under a wide variety of (weather) conditions during daytime and nighttime and combines the...
conference paper 2012
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Houtkamp, J.M. (author), Toet, A. (author)
bookPart 2012
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Toet, A. (author), Hogervorst, M.A. (author)
We present an overview of our recent progress and the current state-of-the-art techniques of color image fusion for night vision applications. Inspired by previously developed color opponent fusing schemes, we initially developed a simple pixel-based false color-mapping scheme that yielded fused false color images with large color contrast and...
article 2012
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Toet, A. (author), van Schaik, M.G. (author)
Despite the fact that virtual environments are increasingly deployed to study the relation between urban planning, physical and social disorder, and fear of crime, their ecological validity for this type of research has not been established. This study compares the effects of similar signs of public disorder (litter, warning signs, cameras,...
article 2012
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Garcia, J.A. (author), Rodriguez-Sánchez, R. (author), Fdez-Valdivia, J. (author), Toet, A. (author)
The objective of image fusion is to represent relevant information from multiple individual images in a single image. Some fusion methods may represent important visual information more distinctively than others, thereby conveying it more efficiently to the human observer. Here, we propose to rank order images fused by different methods...
article 2012
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