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检索条件"任意字段=Symposium on Applied Perception in Graphics and Visualization, APGV 2008"

共 134 条记录，以下是31-40 订阅

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Evaluating the effectiveness of visualization techniques for schematic diagrams in maintenance tasks 10

Evaluating the effectiveness of visualization techniques for...

引用

7th Annual symposium on applied perception in graphics and visualization, apgv 2010

作者： Kim, Sungye Woo, Insoo Maciejewski, Ross Ebert, David S. Ropp, Timothy D. Thomas, Krystal Rendering and Perceptualization Laboratory Purdue University United States Aviation Technology Purdue University United States Air Force Research Laboratory United States

ISBN: (纸本)9781450302487

In order to perform daily maintenance and repair tasks in complex electrical and mechanical systems, technicians commonly utilize a large number of diagrams and documents detailing system properties in both electronic and print formats. In electronic document views, users typically are only provided with traditional pan and zoom features;however, recent advances in information visualization and illustrative rendering styles should allow users to analyze documents in a more timely and accurate fashion. In this paper, we evaluate the effectiveness of rendering techniques focusing on methods of document/diagram highlighting, distortion, and navigation while preserving contextual information between related diagrams. We utilize our previously developed interactive visualization system (SDViz) for technical diagrams for a series of quantitative studies and an in-field evaluation of the system in terms of usability and usefulness. In the quantitative studies, subjects perform small tasks that are similar to actual maintenance work while using tools provided by our system. First, the effects of highlighting within a diagram and between multiple diagrams are evaluated. Second, we analyze the value of preserving highlighting as well as spatial information when switching between related diagrams, and then we present the effectiveness of distortion within a diagram. Finally, we discuss a field study of the system and report the results of our findings. © 2010 ACM.

关键词： visualization

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perception of linear and nonlinear motion properties using a FACS validated 3D facial model 10

Perception of linear and nonlinear motion properties using a...

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7th Annual symposium on applied perception in graphics and visualization, apgv 2010

作者： Cosker, Darrene Krumhuber, Eva Hilton, Adrian Department of Computer Science University of Bath United Kingdom Swiss Center for Affective Sciences University of Geneva Switzerland Centre for Vision Speech and Signal Processing University of Surrey United Kingdom

ISBN: (纸本)9781450302487

In this paper we present the first Facial Action Coding System (FACS) valid model to be based on dynamic 3D scans of human faces for use in graphics and psychological research. The model consists of FACS Action Unit (AU) based parameters and has been independently validated by FACS experts. Using this model, we explore the perceptual differences between linear facial motions - represented by a linear blend shape approach - and real facial motions that have been synthesized through the 3D facial model. Through numerical measures and visualizations, we show that this latter type of motion is geometrically nonlinear in terms of its vertices. In experiments, we explore the perceptual benefits of nonlinear motion for different AUs. Our results are insightful for designers of animation systems both in the entertainment industry and in scientific research. They reveal a significant overall benefit to using captured nonlinear geometric vertex motion over linear blend shape motion. However, our findings suggest that not all motions need to be animated nonlinearly. The advantage may depend on the type of facial action being produced and the phase of the movement. © 2010 ACM.

关键词： Animation

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Quality assessment of fractalized NPR textures: A perceptual objective metric 09

Quality assessment of fractalized NPR textures: A perceptual...

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apgv 2009: symposium on applied perception in graphics and visualization

作者： Bénard, Pierre Thollot, Joëlle Sillion, François Grenoble Universities and CNRS - LJK INRIA Laboratoire Jean Kuntzmann France

ISBN: (纸本)9781605587431

Texture fractalization is used in many existing approaches to ensure the temporal coherence of a stylized animation. This paper presents the results of a psychological user-study evaluating the relative distortion induced by a fractalization process of typical medium textures. We perform a ranking experiment, assess the agreement among the participant and study the criteria they used. Finally we show that the average co-occurrence error is an efficient quality predictor in this context. © 2009 ACM.

关键词： Rendering (computer graphics)

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Human perception of quadruped motion 09

Human perception of quadruped motion

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apgv 2009: symposium on applied perception in graphics and visualization

作者： Skrba, Ljiljana O'Sullivan, Carol

ISBN: (纸本)9781605587431

In our research we are interested in human sensitivity to differences in animal gaits. We use point light walkers as stimuli, and follow up with a study using a realistic 3D model. Previously it has been shown that humans can regonise human motion, gender and the identity of an actor from a set of moving points [1973;1977]. McDonnell et al. [2008] show that both shape and motion influence sex perception of virtual human characters. Mather and West [1993] have shown that people can recognise animals from pointlight displays. In order to find out whether we can tell the difference between animals using motion cues, we captured the motion of farm animals. © 2009 ACM.

关键词： Animals

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The effects of continued exposure to medium field augmented and virtual reality on the perception of egocentric depth 09

The effects of continued exposure to medium field augmented ...

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apgv 2009: symposium on applied perception in graphics and visualization

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

ISBN: (纸本)9781605587431

Research in the perception of depth in augmented and virtual reality has reported a consistent underestimation of egocentric depth with regard to stationary objects located along the ground plane. However, there has been a rather large disparity in the degree of underestimation reported from study to study with some studies reporting as much as a 68% underestimation of egocentric depth while others report as little as 6% [Jones et al. 2008]. The current study investigates the judgment of egocentric distance in real, augmented, and virtual environments and finds that subjects' judgments improve in accuracy as exposure continues in the absence of explicit feedback. © 2009 ACM.

关键词： Virtual reality

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A psychophysical study of dominant texture detection 09

A psychophysical study of dominant texture detection

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apgv 2009: symposium on applied perception in graphics and visualization

作者： Lu, Jianye Garr-Schultz, Alexandra Dorsey, Julie Rushmeier, Holly Computer Graphics Group Yale University United States

ISBN: (纸本)9781605587431

Images of everyday scenes are frequently used as input for texturing 3D models in computer graphics. Such images include both the texture desired and other extraneous information. In our previous work [Lu et al. 2009], we defined dominant texture as a large homogeneous region in an input sample image and proposed an automatic method to detect dominant textures based on diffusion distance manifolds. In this work, we explore the identification of cases where diffusion distance manifolds fail, and consider the best alternative method for such cases. © 2009 ACM.

关键词： Image texture

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Evaluation of glyph-based multivariate scalar volume visualization techniques 09

Evaluation of glyph-based multivariate scalar volume visuali...

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apgv 2009: symposium on applied perception in graphics and visualization

作者： Feng, David Lee, Yueh Kwock, Lester Taylor II, Russell M. UNC Computer Science United States UNC Radiology United States

ISBN: (纸本)9781605587431

We present a user study quantifying the effectiveness of Scaled Data-Driven Spheres (SDDS), a multivariate three-dimensional data set visualization technique. The user study compares SDDS, which uses separate sets of colored sphere glyphs to depict variable values, to superquadric glyphs, an alternative technique that maps all variable values to a single glyph. User study participants performed tasks designed to measure their ability to estimate values of particular variables and identify relationships among variables. Results from the study show that users were significantly more accurate and faster for both tasks under the SDDS condition. © 2009 ACM.

关键词： Data visualization

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Optic flow and physical effort as cues for the perception of the rate of selfproduced motion in VE 09

Optic flow and physical effort as cues for the perception of...

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apgv 2009: symposium on applied perception in graphics and visualization

作者： Chihak, Benjamin Pick Jr., Herbert Plumert, Jodie Ziemer, Christine Babu, Sabarish Cremer, James Kearney, Joseph Departments of Psychology and Computer Science University of Iowa United States Institute of Child Development University of Minnesota United States

ISBN: (纸本)9781605587431

Understanding how humans perceive their rate of translational locomotion through the world is important for designing virtual environments. People have access to two primary classes of cues that can provide information about their movement through the environment: Visual and auditory cues (e.g. optic flow, optical expansion, Doppler shift) and somatosensory cues (e.g. effort, proprioceptive feedback.) An important research question is the relative weighting of these cues for perceiving the rate of translational movement in a virtual environment. © 2009 ACM.

关键词： Virtual reality

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Distance perception in virtual environments: A closer look at the horizon and the error 09

Distance perception in virtual environments: A closer look a...

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apgv 2009: symposium on applied perception in graphics and visualization

作者： Williams, Betsy Rasor, Travis Narasimham, Gayathri Rhodes College United States Vanderbilt University United States

ISBN: (纸本)9781605587431

Distances are systematically underestimated in the virtual environments. In this work we explore the possibility of shifting the angular the angular declination from the horizon as a way of manipulating perceived distances in a head-mounted display (HMD). We find that shifting the horizon upward 11.5 upward does not have an effect on distance perception. Blind walking tasks at 1.5m, 2.5m, 3.5m, 4.5m and 5.5m show an overestimation of perceived distances less than 2.5m and an underestimation of perceived distances greater than 3.5m. Absolute distance and errors in estimating distance are linearly related. © 2009 ACM.

关键词： Virtual reality

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Investigating the effect of real-time stylisation techniques on user task performance 09

Investigating the effect of real-time stylisation techniques...

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apgv 2009: symposium on applied perception in graphics and visualization

作者： Redmond, Niall Dingliana, John Graphics Vision and Visualization Group Trinity College Dublin Ireland

ISBN: (纸本)9781605587431

In this paper, we present a perceptual experiment whose results aid the creation of non-photorealistic rendering (NPR) styles which can positively affect user task performance in real-time scenes. In a visual search task designed to test people's perception of abstracted scenes, different types of stylisation are used to investigate how reaction times can be affected. We show how NPR techniques compare against non-stylised renderings, compare the effectiveness of different styles, determine how varying each style can affect performance and investigate how these styles perform with objects of varying complexity. The results show that NPR can be a useful tool for increasing the saliency of target objects while reducing the visual impact of the rest of the scene. However, it is also shown that the success of each style depends largely on the scene context and also on the level of stylisation used. We believe the results from this study can help in the creation of effective NPR styles in the future. Supplementary material can be found at http://***/skrbal/ redmond/. © 2009 ACM.

关键词： Rendering (computer graphics)

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