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Pacific Conference on computer graphics and Applications

作者： T. Ullmann J. Sauer Department of Computer Science and Automation Computer Graphics Program Technical University Ilmenau Ilmenau Germany Commercial Vehicle Development DaimlerChrysler Aerospace Sindelfingen Germany Virtual Reality Competence Center Daimler Chrysler Research and Technology Center Ulm Germany

This paper presents an approach for grasping virtual objects in virtual environments with a data glove. Our focus lies on developing new methods that allow sensible realistic grasping gestures which correspond to human grasping behavior. To meet the demands of industrial applications, users must be able to grasp an object in an intuitive way with one or two hands and, beyond that, manipulate grasped objects between their fingers. To avoid the use of expensive force or touch feedback hardware, but also to ensure a safe grip on virtual objects, several forms of visual feedback are provided. First, we describe the basic algorithm for grasping with one or two hands and finally, we present a method to precisely manipulate the grasped objects between the virtual fingers.

关键词： Grasping Haptic interfaces Data gloves Virtual reality Virtual environment Fingers Force feedback Hardware Application software Engines

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On the Triangle-Perimeter Two-Site Voronoi Diagram

On the Triangle-Perimeter Two-Site Voronoi Diagram

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International Symposium on Voronoi Diagrams in science and Engineering (ISVD)

作者： Iddo Hanniel Gill Barequet Research Group Solid Works Corporation Concord MA USA Center of Graphics and Geometric Computing Department of Computer Science Technion-Israel Institute of Technology Israel

The triangle-perimeter 2-site distance function defines the "distance" P(x, (p, q)) from a point x to two other points p, q as the perimeter of the triangle whose vertices are x, p, q. Accordingly, given a set S of n points in the plane, the Voronoi diagram of S with respect to P, denoted as V P (S), is the subdivision of the plane into regions, where the region of p, q ¿ S is the locus of all points closer to p, q (according to P) than to any other pair of sites in S. In this paper we prove a theorem about the perimeters of triangles, two of whose vertices are on a given circle. We use this theorem to show that the combinatorial complexity of V P (S) is O(n 2+¿ ) (for any ¿ > 0). Consequently, we show that one can compute V P (S) on O(n 2+¿ ) time and space.

关键词： computer science Q measurement Mobile antennas Transmitting antennas computer graphics Crystallography Geography Metrology Biology Mathematics

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Advances in Visual Computing 1

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丛书名： Lecture Notes in computer science

1000年

作者： George Bebis Richard Boyle Bahram Parvin Darko Koracin Paolo Remagnino Ara Nefian Gopi Meenakshisundaram Valerio Pascucci Jiri Zara Jose Molineros Holger Theisel Tom Malzbender

ISBN: (数字)9783540486275

ISBN: (纸本)9783540486268

It is with great pleasure that we welcome you all to the proceedings of the 2nd InternationalSymposiumonVisualComputing(ISVC2006)heldinLakeTahoe. Followinga successfulmeeting lastyear,wewitnesseda muchstrongerandmore productive event this year. ISVC o?ers a common umbrella for the four main areas of visual computing including vision, graphics, visualization, and virtual reality. Its goal is to provide a forum for researchers, scientists, engineers and practitionersthroughouttheworldtopresenttheirlatestresearch?ndings,ideas, developments and applications in the broader area of visual computing. This year, the program consisted of 13 oral sessions, one poster session, ten special tracks, and six keynote presentations. The response to the call for - pers was very strong. We received more than twice the papers received last year. Speci?cally, we received over 280 submissions for the main symposium from which we accepted 65 papers for oral presentation (23% acceptance) and 56 papers for poster presentation (20% acceptance). Special track papers were solicited separately through the Organizing and Program Committees of each track. A total of 57 papers were accepted for presentation in the special tracks. All papers were reviewed with an emphasis on potential to contribute to the state of the art in the ?eld. Selection criteria included accuracy and originality of ideas, clarity and signi?cance of results, and presentation quality. The review process was quite rigorous, involving two to three independent blind reviews followed by several days of discussion. During the discussion period we tried to correct anomalies and errors that might have existed in the initial reviews.

关键词： Pattern Recognition computer Applications Programming Techniques Image Processing and computer Vision Artificial Intelligence computer graphics

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Advances in Visual Computing 1

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丛书名： Lecture Notes in computer science

1000年

作者： George Bebis Richard Boyle Bahram Parvin Darko Koracin Paolo Remagnino Ara Nefian Gopi Meenakshisundaram Valerio Pascucci Jiri Zara Jose Molineros Holger Theisel Tom Malzbender

ISBN: (数字)9783540486312

ISBN: (纸本)9783540486282

关键词： Software Engineering/Programming and Operating Systems Pattern Recognition Image Processing and computer Vision Artificial Intelligence computer graphics Algorithm Analysis and Problem Complexity

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Styles of play in immersive and interactive story: Case studies from a gallery installation of AR façade

Styles of play in immersive and interactive story: Case stud...

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2008 International Conference on Advances in computer Entertainment Technology, ACE 2008

作者： Dow, Steven MacIntyre, Blair Mateas, Michael GVU Center School of Interactive Computing Georgia Institute of Technology 85 5th Street NW Atlanta GA 30332-0760 United States Computer Science Department University of California Santa Cruz 1156 High Street M/S SOE3 Santa Cruz CA 95064 United States

ISBN: (纸本)9781605583938

In this paper, we offer an empirical investigation of AR Façade, an Immersive and interactive Story where players interact with an animated married couple through an augmented reality (AR) interface that allows for unconstrained body movement and speech communication. We conducted a "mixed-method" in-depth analysis of thirty-three players during a gallery installation of the experience and identified five emergent "styles of play". We present qualitative case studies to illustrate the diverse behavior of participants and then we analyze quantitative differences that can lead to improved player modeling. Like prior work on play types in other media environments, our work elucidates the range of behaviors that can emerge in immersive and interactive stories. © 2008 ACM.

关键词： Human engineering

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Measuring affect in HCI: Going beyond the individual

Measuring affect in HCI: Going beyond the individual

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28th Annual CHI Conference on Human Factors in Computing Systems

作者： Shami, N. Sadat Hancock, Jeffrey T. Peter, Christian Muller, Michael Mandryk, Regan Information Science Program Cornell University 301 College Ave Ithaca NY 14850 United States Fraunhofer Institute for Computer Graphics Joachim Jungius Str. 11 18059 Rostock Germany Collaborative User Experience IBM TJ Watson Research Center 1 Rogers St. Cambridge MA 02142 United States Department of Computer Science University of Saskatchewan 176 Thorvaldson Building 110 Science Place Saskatoon SK S7N 5C9 Canada

The measurement of affect in HCI research is a challenging and complex issue. Although a number of techniques for measuring affect have been developed, a systematic discussion of their effectiveness and applicability in different contexts remains lacking, especially in social contexts with multiple users. As computing shifts to increasingly collaborative and ubiquitous models, it is important to discuss affect measurement beyond the individual level. This workshop will provide a forum where designers, practitioners, and researchers can 1) introduce novel methods of affect measurement that go beyond physiological and self-report measures, 2) advance our understanding of existing measurement methods and how they can be expanded, and 3) critically evaluate issues of affect measurement.

关键词： Ubiquitous computing

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Developing Industrial Case-Based Reasoning Applications 2

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丛书名： Lecture Notes in computer science

1000年

作者： Ralph Bergmann Klaus-Dieter Althoff Sean Breen Mehmet Göker Michel Manago Ralph Traphöner Stefan Wess

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Integrating visualization support into distributed computing systems

Integrating visualization support into distributed computing...

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International Conference on Distributed Computing Systems

作者： B. Topol J.T. Stasko V. Sunderam Graphics Visualization and Usability Center College of Computing Georgia Institute of Technology Atlanta GA USA Department of Math and computer Science Emory University Atlanta GA USA

Visualization and animation tools may become extremely important aids in the understanding, verification, and performance tuning of parallel computations. Presently, however, the use of visualization has had only a limited use for enhancing parallel computation. We hypothesize that one of the primary reasons for the limited use of visualization tools in parallel program development is the difficulty of acquiring the information necessary to drive the visual display. Our approach to this impediment focuses on integrating visualization support directly into a distributed computing system. Central to this integration is the addition of a logical clock that prevents the timestamps of events from violating causality. The implementation requires the "piggybacking" of a negligible amount of extra header information on system messages and the impact on performance is minimal. This results in a system that produces useful visualizations with no extra effort required by the applications programmer. Also integrated into the distributed system is support which simplifies the creation of programmer-defined, application-specific visualizations, unique to each new parallel program developed.

关键词： Visualization Distributed computing Concurrent computing Animation Drives Displays Impedance Clocks Programming profession

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On Voronoi Diagrams for Lines in the Plane

On Voronoi Diagrams for Lines in the Plane

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International Conference on Computational science and its Applications (ICCSA)

作者： Gill Barequet Kira Vyatkina Center of Graphics and Geometric Computing Department of Computer Science Technion-Israel Institute of Technology Haifa Israel Department of Mathematics and Mechanics Saint Petersburg State University Saint Petersburg Russia

We describe a method based on the wavefront propagation, which computes a multiplicatively weighted Voronoi diagram for a set L of n lines in the plane in O(n 2 log n) time and O(n 2 ) space. In the process, we derive complexity bounds and certain structural properties of such diagrams. An advantage of our approach over the general purpose machinery, which requires computation of the lower envelope of a set of halfplanes in three-dimensional space, lies in its relative simplicity. Besides, we point out that the unweighted Voronoi diagram for n lines in the plane has a simple structure, and can be obtained in optimal thetas(n 2 ) time and space.

关键词： Machinery Euclidean distance Application software computer graphics computer science Mathematics

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A low-overhead approach for self-sovereign identity in IoT

arXiv

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arXiv 2021年

作者： Fedrecheski, Geovane Costa, Laisa C.P. Afzal, Samira Rabaey, Jan M. Lopes, Roseli D. Zuffo, Marcelo K. Interdisciplinary Center on Interactive Technologies Polytechnic School University of Sao Paulo Brazil Berkeley Wireless Research Center Electrical Engineering and Computer Science Department University California Berkeley United States

We present a low-overhead mechanism for self-sovereign identification and communication of IoT agents in constrained networks. Our main contribution is to enable native use of Decentralized Identifiers (DIDs) and DID-based secure communication on constrained networks, whereas previous works either did not consider the issue or relied on proxy-based architectures. We propose a new extension to DIDs along with a more concise serialization method for DID metadata. Moreover, in order to reduce the security overhead over transmitted messages, we adopted a binary message envelope. We implemented these proposals within the context of Swarm Computing, an approach for decentralized IoT. Results showed that our proposal reduces the size of identity metadata in almost four times and security overhead up to five times. We observed that both techniques are required to enable operation on constrained networks. © 2021, CC BY-NC-SA.

关键词： Metadata

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