Searched for: subject:"Perception"
(1 - 20 of 46)

Pages

document
Nooij, S.A.E. (author), Bockisch, C.J. (author), Bülthoff, H.H. (author), Staumann, D. (author)
Illusory self-motion often provokes motion sickness, which is commonly explained in terms of an inter-sensory conflict that is not in accordance with previous experience. Here we address the influence of cognition in motion sickness and show that such a conflict is not provocative when the observer believes that the motion illusion is indeed...
article 2021
document
Katliar, M. (author), Olivari, M. (author), Drop, F.M. (author), Nooij, S. (author), Diehl, M. (author), Bülthoff, H.H. (author)
This paper presents a method to simultaneously compute optimal simulator motions and simulator parameters for a predefined set of vehicle motions. The optimization can be performed with a model of human motion perception or sensory dynamics taken into account. The simulator dynamics, sensory dynamics, and optimality criterion are provided by the...
article 2019
document
Bos, J.E. (author), van den Berg-Kroon, E.C.M. (author), Houben, M.M.J. (author), Kuiper, O.X. (author)
Car handling, and hence, safety, is affected by the way we estimate speed. Speed, however, is often underestimated in degraded visual environments, including virtual environments such as driving simulators. In simulators the visual and physical motion are typically incongruent as limited by quality and amplitude, respectively, which may cause a...
article 2019
document
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
document
de Waard, J.M. (author), van der Burg, E. (author), Olivers, C.N.L. (author)
We report two psychophysical experiments that investigate a visual illusion that is considered common knowledge among type designers, but has never been studied scientifically. Specifically, the thickness of a horizontal line is overestimated in relation to that of a vertical line. Experiment 1 confirmed the existence of the illusion. In...
article 2019
document
Philippi, T.G. (author)
The overarching purpose of this thesis was to investigate the beneficial effects of congruent visual, auditory, and tactile presentation on navigation performance. Overall, the results show that multisensory presentation is advantageous. An important aspect of this finding is that multisensory performance was always equal to or higher than the...
doctoral thesis 2013
document
Bijl, P. (author), Reynolds, J.P. (author), Vos, W.K. (author), Hogervorst, M.A. (author), Fanning, J.D. (author)
The TTP (Targeting Task Performance) metric, developed at NVESD, is the current standard US Army model to predict EO/IR Target Acquisition performance. This model however does not have a corresponding lab or field test to empirically assess the performance of a camera system. The TOD (Triangle Orientation Discrimination) method, developed at TNO...
conference paper 2011
document
Kooi, F.L. (author), Dekker, D. (author), van Ee, R. (author), Brouwer, A.-M. (author), TNO Defensie en Veiligheid (author)
Background: About 30% of the population has difficulties detecting the sign and the magnitude of binocular disparity in the absence of eye movements, a phenomenon called stereo-anomaly. The stereo-anomaly tests so far are based on disparity only (e.g. red-green stereograms), which means that other depth cues cannot be used and even provide...
article 2010
document
Philippi, T.G. (author), van Erp, J.B.F. (author), Werkhoven, P. (author), TNO Defensie en Veiligheid (author)
When the presentation of a single flash is paired with that of 2 taps, a second, illusory, flash is sometimes perceived. We presented participants with 1 or 2 flashes paired with 1 or 2 taps and asked them to report the number of flashes. In experiment 1, we used the response categories 1, 2, 3 and analyzed the responses to 2 consecutive...
conference paper 2010
document
Toet, A. (author), Hogervorst, M.A. (author), Nikolov, S.G. (author), Lewis, J.J. (author), Dixon, T.D. (author), Bull, D.R. (author), Canagarajah, C.N. (author), TNO Defensie en Veiligheid (author)
The increasing availability and deployment of imaging sensors operating in multiple spectral bands has led to a large research effort in image fusion, resulting in a plethora of pixel-level image fusion algorithms. However, the cognitive aspects of multisensor image fusion have not received much attention in the development of these methods. In...
article 2010
document
Brouwer, A.-M. (author), Knill, D.C. (author), TNO Defensie en Veiligheid (author)
We investigated whether humans use a target's remembered location to plan reaching movements to targets according to the relative reliabilities of visual and remembered information. Using their index finger, subjects moved a virtual object from one side of a table to the other, and then went back to a target. In some trials, the target shifted...
article 2009
document
Valente Pais, A.R. (author), van Paassen, M.M. (author), Mulder, M. (author), Wentink, M. (author), TNO Defensie en Veiligheid (author)
The importance of motion perception knowledge for flight simulation is widely recognized. The development and tuning of motion filters relies on understanding the human motion perception mechanisms and its limitations. Particularly interesting for flight simulation is the study of visual-vestibular coherence zones. Coherence zones refer to...
conference paper 2009
document
Bijl, P. (author), de Vries, S.C. (author), TNO Defensie en Veiligheid (author)
Video of Visual Acuity (VA) and Contrast Sensitivity (CS) test charts in a complex background was recorded using a CCD camera mounted on a computer-controlled tripod and fed into real-time MPEG2 compression/decompression equipment. The test charts were based on the Triangle Orientation Discrimination (TOD) test method and contained triangle test...
conference paper 2009
document
van der Burg, E. (author), Olivers, C.N.L. (author), Bronkhorst, A.W. (author), Theeuwes, J. (author), TNO Defensie en Veiligheid (author)
The majority of studies investigating interactions between vision and touch have typically explored single events, presenting one object at a time. The present study investigates how tactile-visual interactions affect competition between multiple visual objects in more dynamic cluttered environments. Participants searched for a horizontal or...
article 2009
document
Lucassen, M.P. (author), Bijl, P. (author), Roelofsen, J. (author), TNO Defensie en Veiligheid (author)
We present psychophysical data on the perception of static colored noise. In our experiments, we use the CIE94 color difference formula to quantify the noise strength and for describing our threshold data. In Experiment 1 we measure the visual detection thresholds for fixed pattern noise on a uniform background color. The noise was present in...
article 2008
document
van der Burg, E. (author), Olivers, C.N.L. (author), Bronkhorst, A.W. (author), Theeuwes, J. (author), TNO Defensie en Veiligheid (author)
Searching for an object within a cluttered, continuously changing environment can be a very time-consuming process. The authors show that a simple auditory pip drastically decreases search times for a synchronized visual object that is normally very difficult to find. This effect occurs even though the pip contains no information on the location...
article 2008
document
Salem, S. (author), Jacobs, E. (author), Moore, R. (author), Hogervorst, M.A. (author), Bijl, P. (author), TNO Defensie en Veiligheid (author)
Perception tests establish the effects of spatially band-limited noise and blur on human observer performance. Previously, Bijl showed that the contrast threshold of a target image with spatially band-limited noise is a function of noise spatial frequency. He used the method of adjustment to find the contrast thresholds for each noise frequency...
conference paper 2008
document
Hogervorst, M.A. (author), Toet, A. (author)
We present a fast and efficient method to derive and apply natural colors to nighttime imagery from multiband sensors. The color mapping is derived from the combination of a multiband image and a corresponding natural color reference image. The mapping optimizes the match between the multiband image and the reference image, and yields a...
conference paper 2008
document
Alferdinck, J.W.A.M. (author), TNO Defensie en Veiligheid (author)
During night-time driving hazardous objects often appear at mesopic light levels, which are typically measured using light meters with a spectral sensitivity that is only valid for photopic light levels. In order to develop suitable mesopic models a target detection experiment was performed in a driving simulator. While subjects drove along a...
article 2006
document
Beintema, J.A. (author), Georg, K. (author), Lappe, M. (author)
The visual perception of human movement from sparse point-light walkers is often believed to rely on local motion analysis. We investigated the role of local motion in the perception of human walking, viewed from the side, in different tasks. The motion signal was manipulated by varying point lifetime. We found the task of coherence...
article 2006
Searched for: subject:"Perception"
(1 - 20 of 46)

Pages