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IEEE Virtual Reality Conference

作者： Dimitar Valkov John Martens Klaus Hinrichs Visualization and Computer Graphics (VisCG) Research Group Department of Computer Science at the University of Münster Germany

ISBN: (纸本)9781509008377

It is well known that distance estimation in immersive virtual reality environments suffers from compression when viewed from an egocentric perspective with a head mounted display. While previous research indicates that providing the user with a virtual avatar with high geometric and motion fidelity may alleviate this problem, little work has been done to investigate which properties of the avatar's representation influence the distance estimation and how. In this poster we report the results of an evaluation of the user's distance perception with different avatar representations. Our results indicate that anthropometric fidelity of the avatar has stronger effect on the distance perception than its visual fidelity.

关键词： 1.3.3 [computer graphics]: Three-Dimensional graphics and Realism-Virtual reality

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Animating horse gaits and transitions

Animating horse gaits and transitions

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8th Theory and Practice of computer graphics Conference, TPCG 2010

作者： Murphy, J.E. Carr, H. O'Neill, M. Imaging Visualisation and Graphics Group School of Computer Science and Informatics University College Dublin Ireland Visualization and Virtual Reality Group School of Computing University of Leeds United Kingdom Natural Computing Research and Applications Group School of Computer Science and Informatics University College Dublin Ireland

ISBN: (纸本)9783905673753

Animations of horses are commonly used for entertainment purposes. A realistic animated model must move with a gait appropriate to its velocity. We present a kinematic animation system in which a horse model moves using gaits and transitions based on predictions from Dynamic Similarity theory. A Genetic Programming technique is used to evolve gait motion with dynamically adjustable limb extent. The system is controlled in real-time using a MIDI controller system based around the model's Froude number. We were successful in producing high quality animations of the horse's natural gaits and transitions. © The Eurographics Association 2010.

关键词： Genetic algorithms

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Advanced illumination techniques for GPU-based volume raycasting 09

Advanced illumination techniques for GPU-based volume raycas...

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ACM SIGGRAPH 2009 Courses, SIGGRAPH '09

作者： Hadwiger, Markus Ljung, Patric Salama, Christof Rezk Ropinski, Timo VRVis Research Center for Virtual Reality and Visualization Donau-City-Straße 1 A-1220 Vienna Austria Siemens Corporate Research Imaging and Visualization Department 755 College Road East Princeton NJ 08540 United States Computer Graphics Group University of Siegen Hölderlinstr. 3 57068 Siegen Germany Visualization and Computer Graphics Research Group University of Münster Einsteinstr. 62 48149 Münster Germany

ISBN: (纸本)9781450379380

Volume raycasting techniques are important for both visual arts and visualization. They allow efficient generation of visual effects and visualization of scientific data obtained by tomography or numerical simulation. Volume-rendering techniques are also effective for direct rendering of implicit surfaces used for soft-body animation and constructive solid geometry. The focus of this course is on volumetric illumination techniques that approximate physically based light transport in participating media. Such techniques include interactive implementation of soft and hard shadows, ambient occlusion, and simple Monte Carlo-based approaches to global illumination, including translucency and scattering.

关键词： visualization

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A multi-touch enabled human-transporter metaphor for virtual 3D traveling

A multi-touch enabled human-transporter metaphor for virtual...

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IEEE Symposium on 3D User Interfaces (3DUI)

作者： Dimitar Valkov Frank Steinicke Gerd Bruder Klaus Hinrichs Visualization and Computer Graphics (VisCG) Research Group Department of Computer Science University of Münster Munster Germany

ISBN: (纸本)9781424468461;9781424468447

In this tech-note we demonstrate how multi-touch hand gestures in combination with foot gestures can be used to perform navigation tasks in interactive 3D environments. Geographic Information Systems (GIS) are well suited as a complex testbed for evaluation of user interfaces based on multi-modal input. Recent developments in the area of interactive surfaces enable the construction of low-cost multi-touch displays and relatively inexpensive sensor technology to detect foot gestures, which allows to explore these input modalities for virtual reality environments. In this tech-note, we describe an intuitive 3D user interface metaphor and corresponding hardware, which combine multi-touch hand and foot gestures for interaction with spatial data.

关键词： Navigation Foot Legged locomotion User interfaces Geographic Information Systems Virtual reality visualization computer graphics computer science System testing

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Immersive virtual studio for architectural exploration

Immersive virtual studio for architectural exploration

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IEEE Symposium on 3D User Interfaces (3DUI)

作者： Gerd Bruder Frank Steinicke Dimitar Valkov Klaus Hinrichs Visualization and Computer Graphics (VisCG) Research Group Department of Computer Science University of Münster Munster Germany

ISBN: (纸本)9781424468461;9781424468447

Architects use a variety of analog and digital tools and media to plan and design constructions. Immersive virtual reality (VR) technologies have shown great potential for architectural design, especially for exploration and review of design proposals. In this work we propose a virtual studio system, which allows architects and clients to use arbitrary real-world tools such as maps or rulers during immersive exploration of virtual 3D models. The user interface allows architects and clients to review designs and compose 3D architectural scenes, combining benefits of mixed-reality environments with immersive head-mounted display setups.

关键词： Virtual reality User interfaces Layout Cameras computer graphics Legged locomotion Laboratories computer displays Three dimensional displays Process design

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Arch-Explore: A natural user interface for immersive architectural walkthroughs

Arch-Explore: A natural user interface for immersive archite...

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IEEE Symposium on 3D User Interfaces (3DUI)

作者： Gerd Bruder Frank Steinicke Klaus H. Hinrichs Visualization and Computer Graphics (VisCG) Research Group Department of Computer Science University of Münster Munster Germany

In this paper we propose the Arch-Explore user interface, which supports natural exploration of architectural 3D models at different scales in a real walking virtual reality (VR) environment such as head-mounted display (HMD) or CAVE setups. We discuss in detail how user movements can be transferred to the virtual world to enable walking through virtual indoor environments. To overcome the limited interaction space in small VR laboratory setups, we have implemented redirected walking techniques to support natural exploration of comparably large-scale virtual models. Furthermore, the concept of virtual portals provides a means to cover long distances intuitively within architectural models. We describe the software and hardware setup and discuss benefits of Arch-Explore.

关键词： User interfaces Legged locomotion Virtual reality computer graphics Indoor environments Laboratories Hardware Virtual environment Haptic interfaces Feedback

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A system for real-time watercolour rendering

A system for real-time watercolour rendering

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computer graphics International 2005, CGI 2005

作者： Burgess, Jeremy Wyvill, Geoff King, Scott A. Computer Graphics and Vision Research Group Department of Computer Science University of Otago New Zealand Computing and Mathematical Sciences Texas A and M-Corpus Christi United States

ISBN: (纸本)0780393309

We present a system for the real-time rendering of scenes to produce images like watercolour paintings. Our system uses a hybrid of object space rendering techniques and image plane post processing to attain extremely good results very quickly. We achieve this through graphics Processing Unit (GPU) programming, hardware accelerated shadow volumes, and the use of noise for various different tasks. We manage to circumvent problems found in both previous image space and object space methods by combining the two. © 2005 IEEE.

关键词： Color image processing

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Graph-based combinations of fragment descriptors for improved 3D object retrieval 12

Graph-based combinations of fragment descriptors for improve...

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3rd ACM Multimedia Systems Conference, MMSys'12

作者： Schreck, Tobias Scherer, Maximilian Walter, Michael Bustos, Benjamin Yoon, Sang Min Kuijper, Arjan Data Analysis and Visualization Group University of Konstanz Germany Interactive Graphics Systems Technische Universität Darmstadt Germany KDW+PRISMA Department of Computer Science University of Chile Chile Yonsei Institute of Convergence Technology Yonsei University Korea Republic of Fraunhofer Institute for Computer Graphics Research Darmstadt Germany

ISBN: (纸本)9781450311311

3D Object Retrieval is an important field of research with many application possibilities. One of the main goals in this research is the development of discriminative methods for similarity search. The descriptor-based approach to date has seen a lot of research attention, with many different extraction algorithms proposed. In previous work, we have introduced a simple but effective scheme for 3D model retrieval based on a spatially fixed combination of 3D object fragment descriptors. In this work, we propose a novel flexible combination scheme based on finding the best matching fragment descriptors to use in the combination. By an exhaustive experimental evaluation on established benchmark data we show the capability of the new combination scheme to provide improved retrieval effectiveness. The method is proposed as a versatile and inexpensive method to enhance the effectiveness of a given global 3D descriptor approach. © 2012 ACM.

关键词： Self organizing maps

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Guest Editorial:Special Issue on visualization and computer graphics

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Tsinghua science and Technology 2012年第4期17卷 I0001-I0002页

作者： Jing Yang Shixia Liu Ye Zhao Ying-Qing Xu William Ribarsky Department of Computer Science University of North Carolina at Charlotte Charlotte NC 28223 USA Internet Graphics Group Microsoft Research Asia Beijing 100080 China Department of Computer Science Kent State University Kent Ohio 44242 USA Department of Information Art & Design Tsinghua University Beijing 100084 China

In the decade of data explosion, a significant challenge is how to transform data into understandings and insights that are useful to people. visualization, the use of computer-supported, interactive visual representations of data to amplify cognition, is an important approach to addressing this challenge. In particular, scientific visualization primarily represents physical or geometric data while information visualization mainly represents abstract data such as text documents, graphs, and multidimensional data. Visual analytics, springing out of the fields of information visualization and scientific visualization,

关键词： Special issues and sections Visual analytics Algorithm design and analysis Data visualization

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Bringing icons to life 91

Bringing icons to life

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1991 SIGCHI Conference on Human Factors in Computing Systems, CHI 1991

作者： Baecker, Ronald Small, Ian Mander, Richard Dynamic Graphics Project Computer Systems Research Institute and Department of Computer Science University of Toronto Canada Human Interface Group Apple Computer Inc. Canada Department of Educational Psychology Stanford University United States

ISBN: (纸本)0897913833

Icons are used increasingly in interfaces because they are compact "universal" pictographic representations of computer functionality and processing. Animated icons can bring to life symbols representing complete applications or functions within an application, thereby clarifying their meaning, demonstrating their capabilities, and even explaining their method of use. To test this hypothesis, we carried out an iterative design of a set of animated painting icons that appear in the HyperCard tool palette. The design discipline restricted the animations to 10 to 20 second sequences of 22×20 pixel bit maps. User testing was carried out on two interfaces - one with the static icons, one with the animated icons. The results showed significant benefit from the animations in clarifying the purpose and functionality of the icons. ©1991 ACM.

关键词： Iterative methods

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