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检索条件"任意字段=Symposium on Applied Perception in Graphics and Visualization"

共 152 条记录，以下是11-20 订阅

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Coordinated interaction for enhanced perception in Multiple Views 11

Coordinated interaction for enhanced perception in Multiple ...

引用

8th Annual symposium on applied perception in graphics and visualization, APGV 2011

作者： Wojdziak, Jan Zavesky, Martin Starke, Michael Groh, Rainer Institute of Software and Multimedia Technology Technische Universität Dresden Germany

ISBN: (纸本)9781450308892

In standard computer graphics environments, there are numerous of tools to view and edit data. Those tools often use more than one view to support visualization and interaction more efficiently [Maple et al. 2004]. Based on existing work of Coordinated Multiple Views (CMV) [Roberts 2007], our approach introduces atomic modifiers to coordinate views in 3D-applications. Adaptable to a given context, complex and flexible view adjustments can be achieved by combining modifiers. Thereby, users gain a deeper and better understanding of the visualized data.

关键词： Three dimensional computer graphics

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Egocentric distance perception in HMD-based virtual environments 11

Egocentric distance perception in HMD-based virtual environm...

引用

8th Annual symposium on applied perception in graphics and visualization, APGV 2011

作者： Lin, Qiufeng Xie, Xianshi Erdemir, Aysu Narasimham, Gayathri McNamara, Timothy P. Rieser, John Bodenheimer, Bobby Vanderbilt University United States

ISBN: (纸本)9781450308892

We conducted a followup experiment to the work of Lin et al. [2011]. The experimental protocol was the same as that of Experiment Four in Lin et al. [2011] except the viewing condition was binocular instead of monocular. In that work there was no distance underestimation, as has been widely reported elsewhere, and we were motivated in this experiment to see if stereoscopic effects in head-mounted displays (HMDs) accounted for this effect.

关键词： Virtual reality

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visualization of uncertain scalar data fields using color scales and perceptually adapted noise 11

Visualization of uncertain scalar data fields using color sc...

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8th Annual symposium on applied perception in graphics and visualization, APGV 2011

作者： Coninx, Alexandre Bonneau, Georges-Pierre Droulez, Jacques Thibault, Guillaume LPPA CNRS Collège de France France LJK Grenoble University INRIA France EDF R and D France

ISBN: (纸本)9781450308892

We present a new method to visualize uncertain scalar data fields by combining color scale visualization techniques with animated, perceptually adapted Perlin noise. The parameters of the Perlin noise are controlled by the uncertainty information to produce animated patterns showing local data value and quality. In order to precisely control the perception of the noise patterns, we perform a psychophysical evaluation of contrast sensitivity thresholds for a set of Perlin noise stimuli. We validate and extend this evaluation using an existing computational model. This allows us to predict the perception of the uncertainty noise patterns for arbitrary choices of parameters. We demonstrate and discuss the efficiency and the benefits of our method with various settings, color maps and data sets. © 2011 ACM.

关键词： Data visualization

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Assessment of stereoscopic depth perception in augmented reality environments based on low-cost technologies 11

Assessment of stereoscopic depth perception in augmented rea...

引用

8th Annual symposium on applied perception in graphics and visualization, APGV 2011

作者： Maiello, Guido Silvestro, Clara Canessa, Andrea Chessa, Manuela Gibaldi, Agostino Sabatini, Silvio P. Solari, Fabio Department of Biophysical and Electronic Engineering University of Genoa Via all'Opera Pia 11a 16145 Genova Italy

ISBN: (纸本)9781450308892

In the last decade, there has been a rapidly growing development of low-cost and commercial interactive systems, both for professional (e.g. scientific visualization, surgery, rehabilitation), and consumer applications (e.g. 3D cinema and videogames). Moreover, there is a recent interest towards the development of simple and affordable systems for motor and cognitive rehabilitation applications to allow patients to perform psychomotor rehabilitation exercises without having to leave their homes [Attygalle et al. 2008].

关键词： Augmented reality

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Realistic simulation of human contrast perception after headlight glares in driving simulations 11

Realistic simulation of human contrast perception after head...

引用

8th Annual symposium on applied perception in graphics and visualization, APGV 2011

作者： Meyer, B. Gonter, M. Grunert, C. Thomschke, S. Vollrath, M. Magnor, M. Computer Graphics Lab. TU Braunschweig Mühlenpfordtstr. 23 38106 Braunschweig Germany Volkswagen AG Konzernforschung Hermann-Münch-Str. 1 38440 Wolfsburg Germany Volkswagen AG Research and Development Lighting and Vision Letterbox 011/15820 38436 Wolfsburg Germany Cognitive Psychology TU Braunschweig Gaussstr. 23 38106 Braunschweig Germany

ISBN: (纸本)9781450308892

The aim of this work is to enable the simulation of the experience of short-time glare effects in a driving simulator by adjusting the display contrast according to human perception. The simulation is displayed on a standard LDR-monitor under of- fice conditions and the prevailing illumination is incorporated. As contrast perception is highly subjective, a psychophysical experi- ment was performed under realistic night driving conditions, in- cluding background illumination as well as a representative driving situation to permit realistic driving behavior.

关键词： Glare

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perception of simplification artifacts for animated characters 11

Perception of simplification artifacts for animated characte...

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8th Annual symposium on applied perception in graphics and visualization, APGV 2011

作者： Larkin, Michéal O'Sullivan, Carol Trinity College Dublin Ireland

ISBN: (纸本)9781450308892

For real-time animation of characters, Level of Detail (LOD) techniques are usually deployed to achieve optimal efficiency and realism. Tools that can aid an application designer or developer to deploy simplification methods and LOD representations under different circumstances are therefore needed. In this paper we explore the perception of texture, silhouette and lighting artifacts on simplified character models, including the effect animation intensity has on the perceptibility of these artifacts. We propose novel methods to simulate each artifact separately, and test their effects in isolation and cumulatively. Our results provide useful insights and guidelines, including the importance of silhouette preservation. An adaptation of PerceptualDiff for predicting simplification detection has been developed, which can be used to guide automatic model placement and LOD selection in realtime character applications. © 2011 ACM.

关键词： Animation

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Peripheral visual information and its effect on distance judgments in virtual and augmented environments 11

Peripheral visual information and its effect on distance jud...

引用

8th Annual symposium on applied perception in graphics and visualization, APGV 2011

作者： Jones, J. Adam Swan II, J. Edward Singh, Gurjot Ellis, Stephen R. Mississippi State University United States NASA Ames Research Center United States

ISBN: (纸本)9781450308892

A frequently observed problem in medium-field virtual environments is the underestimation of egocentric depth. This problem has been described numerous times and with widely varying degrees of severity, and although there has been considerable progress made in modifying observer behavior to compensate for these misperceptions, the question of why these errors exist is still an open issue. This paper presents the findings of a series of experiments, comprising 103 participants, that attempts to identify and quantify the source of a pattern of adaptation and improved depth judgment accuracy over time scales of less than one hour. Taken together, these experiments suggest that peripheral visual information is an important source of information for the calibration of movement within mediumfield virtual environments. © 2011 ACM.

关键词： Depth perception

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Is perception-action coupling more malleable in virtual than in real environments? 11

Is perception-action coupling more malleable in virtual than...

引用

8th Annual symposium on applied perception in graphics and visualization, APGV 2011

作者： Ziemer, Christine J. Chihak, Benjamin Plumert, Jodie M. Nguyen, Tien Dat Cremer, James F. Kearney, Joseph K. Department of Psychology University of Iowa United States Computer Science Department University of Iowa United States

ISBN: (纸本)9781450308892

Whenever we move, we gain experience with how changes in visual flow are related to movement through the environment. One way that researchers have studied these perception-action linkages is through perturbing the normal relationship between perception and action [Kunz et al. 2009;Rieser et al. 1995]. In these studies, people experience an optic flow rate that is manipulated to be significantly faster or slower than their walking rate. Comparison of distance estimates from before and after this recalibration experience typically shows that people who experience faster optic flow undershoot targets at posttest and people who experience slower optic flow overshoot targets at posttest. Here, we examined how experience with mismatched perception and action (i.e., faster or slower optic flow) in a virtual environment affects subsequent distance estimation in the same virtual environment and in a similar real environment. Of particular interest was whether perception-action coupling is more malleable in the virtual environment than in the real environment.

关键词： Virtual reality

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Evaluation of video artifact perception using event-related potentials 11

Evaluation of video artifact perception using event-related ...

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8th Annual symposium on applied perception in graphics and visualization, APGV 2011

作者： Lindemann, Lea Wenger, Stephan Magnor, Marcus Computer Graphics Lab TU Braunschweig Germany

ISBN: (纸本)9781450308892

When new computer graphics algorithms for image and video editing, rendering or compression are developed, the quality of the results has to be evaluated and compared. Since the produced media are usually to be presented to an audience it is important to predict image and video quality as it would be perceived by a human observer. This can be done by applying some image quality metric or by expensive and time consuming user studies. Typically, statistical image quality metrics do not correlate to quality perceived by a human observer. More sophisticated HVS-inspired algorithms often do not generalize to arbitrary images. A drawback of user studies is that perceived image or video quality is filtered by a decision process, which, in turn, may be influenced by the performed task and chosen quality scale. To get an objective view on (subjectively) perceived image quality, electroencephalography can be used. In this paper we show that artifacts appearing in videos elicit a measurable brain response which can be analyzed using the event-related potentials technique. Since electroencephalography itself requires an elaborate procedure, we aim to find a minimal setup to reduce time and participants needed to conduct a reliable study of image and video quality. As a first step we demonstrate that the reaction to a video with or without an artifact can be identified by an off-the-shelf support vector machine, which is trained on a set of previously recorded responses, with a reliability of up to 80% from a single recorded electroencephalogram. © 2011 ACM.

关键词： Electroencephalography

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Egocentric distance perception in real and HMD-based virtual environments: The effect of limited scanning method

Egocentric distance perception in real and HMD-based virtual...

引用

8th Annual symposium on applied perception in graphics and visualization, APGV 2011

作者： Lin, Qiufeng Xie, Xianshi Erdemir, Aysu Narasimham, Gayathri McNamara, Timothy P. Rieser, John Bodenheimer, Bobby Vanderbilt University United States

ISBN: (纸本)9781450308892

We conducted four experiments on egocentric depth perception using blind walking with a restricted scanning method in both the real and a virtual environment. Our viewing condition in all experiments was monocular. We varied the field of view (real), scan direction (real), blind walking method (real and virtual), and selfrepresentation (virtual) over distances of 4 meters to 7 meters. The field of view varied between 21.1° and 13.6°. The scan direction varied between near-to-far scanning and far-to-near scanning. The blind walking method varied between direct blind walking and an indirect method of blind walking that matched the geometry of our laboratory. We varied self-representation between having a selfavatar (a fully tracked, animated, and first-person perspective of the user), having a static avatar (a mannequin avatar that did not move), to having no avatar (a disembodied camera view of the virtual environment). In the real environment, we find an effect of field of view;participants performed more accurately with larger field of view. In both real and virtual environments, we find an effect of blind walking method;participants performed more accurately in direct blind walking. We do not find an effect of distance underestimation in any environment, nor do we find an effect of self-representation. © 2011 ACM.

关键词： Virtual reality

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