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检索条件"任意字段=Proceedings of the 29th International ACM Conference on 3D Web Technology"

共 459 条记录，以下是221-230 订阅

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Spatial audio: Graphic modeling for X3d 11

Spatial audio: Graphic modeling for X3D

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proceedings of the 16th international conference on 3d web technology

作者： ding, Hui Schwarz, diemo Jacquemin, Christian Cahen, Roland LIMSI-CNRS-UPSUD France IRCAM-CNRS-UPMC France ENSCI-Les Ateliers France

ISBN: (纸本)9781450307741

In audio-graphic scenes, visual and audio modalities are synchronized in time and space, and their behaviour is determined by a common process. We present here a novel way of modeling audio-graphic content for interactive 3d scenes with the concept of sound processes and their activation through 2d or 3d profiles. Many 3d applications today support both graphical and audio effects to provide a more realistic user experience;however a common model and interchange format for interactive audio-graphic scenes is still lacking. X3d is one of the most promising formats for 3d scene representation. It is extensible and supports simple spatial audio representation and almost all basic and advanced 3d computer graphics techniques. We therefore propose an extension of the X3d standard to represent the sound process and activation profile model for providing a rich audio-graphic description in X3d. © 2011 acm.

关键词： Chemical activation

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Semi-automatic end-user tools for construction of virtual avatar behaviors 11

Semi-automatic end-user tools for construction of virtual av...

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proceedings of the 16th international conference on 3d web technology

作者： Srinivasan, Madhusudhanan Metoyer, Ronald A. King Abdullah University of Science and Technology Saudi Arabia Oregon State University United States

ISBN: (纸本)9781450307741

We present tools and techniques for the design of an interactive motion data structure to drive virtual avatars. Our approach automatically analyzes a traditional labeled motion graph and constructs a condensed, coarser graph referred to as a Behavior Finite State Machine (BFSM). Each node of the BFSM represents a single behavior, and each weighted edge represents a valid transition and its likelihood. We present a semi-automated mechanism for user-editing of the graph. We also introduce an interface for user-in-the-loop design of transitions and blend spaces to generate controllable avatars from a BFSM. We present the results of our approach using two dynamic interactive examples, locomotion and martial arts, and discuss the strengths and weaknesses of our technique. © 2011 acm.

关键词： digital storage

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ITEM: Inter-texture error measurement for 3d meshes 11

ITEM: Inter-texture error measurement for 3D meshes

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proceedings of the 16th international conference on 3d web technology

作者： Pagés, Rafael Fuentes, david Morán, Francisco Grupo de Tratamiento de Imágenes Universidad Politécnica de Madrid Spain

ISBN: (纸本)9781450307741

We introduce a simple and innovative method to compare any two texture maps, regardless of their sizes, aspect ratios, or even masks, as long as they are both meant to be mapped onto the same 3d mesh. Our system is based on a zero-distortion 3d mesh unwrapping technique which compares two new adapted texture atlases with the same mask but different texel colors, and whose every texel covers the same area in 3d. Once these adapted atlases are created, we measure their difference with ITEM-RMSE, a slightly modified version of the standard RMSE defined for images. ITEM-RMSE is more meaningful and reliable than RMSE because it only takes into account the texels inside the mask, since they are the only ones that will actually be used during rendering. Our method is not only very useful to compare the space efficiency of different texture atlas generation algorithms, but also to quantify texture loss in compression schemes for multi-resolution textured 3d meshes. © 2011 acm.

关键词： Aspect ratio

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Serious Games - design and development of OxyBlood

Serious Games - Design and Development of OxyBlood

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8th international conference on Advances in Computer Entertainment technology (ACE)

作者： Barbosa, Andre F. S. Silva, Frutuoso G. M. Univ Beira Interior Dept Informat Inst Telecomunicacoes P-6201001 Covilha Portugal

ISBN: (纸本)9781450308274

Following the growing phenomenon that is video games, interest on Serious Games has been increasing. Serious Games aim to add educational or training purposes to traditional video games, in order to take advantage of video games' inherent engaging capabilities. Using video games for others purposes than entertainment enables users to train for situations that would otherwise be difficult to experience, due to reasons of cost, safety and time. Serious Games can also be valuable assets for teaching, since they easily capture the attention of users unlike traditional teaching methods. the web has been developing into a powerful multimedia platform that has now the ability to reproduce quality 3d graphics without the use of external plug-ins with webGL. With this technology, developers can create compelling 3d environments and 3d video games that can be accessed by nearly every person that has an internet connection. this paper discusses the importance of Serious Games and details the development phases of a Serious Game developed for the web, using the webGL technology.

关键词： Serious Games 3d Games webGL web Games

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Multimedia mashups for mirror worlds 11

Multimedia mashups for mirror worlds

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proceedings of the 16th international conference on 3d web technology

作者： Tilden, dan Singh, Ankit Polys, Nicholas F. Sforza, Peter Department of Computer Science Virginia Tech. United States Center for Geospatial Information Technology Virginia Tech. United States

ISBN: (纸本)9781450307741

Mirror worlds are virtual worlds that reflect real world locations and events;they may be composed from many sources and exposed to support a wide variety of applications. Building mirror worlds requires the integration of several capabilities in both the content pipeline and the runtime. We describe two case studies to identify the elements of a format's content model are best suited for mirror world representation. the first one increases public accessibility for NOAA's Science On a Sphere•R. the second involves the web-publication of geospatial data relating to Blacksburg, Virginia. through these studies, we examine the challenges encountered, and the implications that those challenges have for an improved mirror world content models. Our results indicate that X3d is a powerful portrayal platform for mirror worlds, and we propose a few improvements that would address the challenges we encountered. © 2011 acm.

关键词： Virtual reality

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X3dMMS: An X3dOM tool for molecular and material sciences 11

X3DMMS: An X3DOM tool for molecular and material sciences

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proceedings of the 16th international conference on 3d web technology

作者： Zollo, Fabiana Caprini, Luca Gervasi, Osvaldo Costantini, Alessandro Department of Mathematics and Computer Science University of Perugia Via Vanvitelli 1 06123 Perugia Italy

ISBN: (纸本)9781450307741

We are presenting a virtual reality environment based on X3dOM technologies and aimed for enabling a researcher in the Molecular and Matter Sciences to set up the initial conditions of a simulation to be performed using the dl-Poly software, through a virtual environment implemented in X3d. After having completed the definition of the molecular system to be studied in a very intuitive and user friendly way, the user can write out the dl-Poly input files. In this way the crucial phase of the initial set up of the simulation is simplified and can be performed in a short time. Even if some technological drawbacks have been experienced in the current X3dOM implementation, we are confident that this approach, which definitely solves the " traditional" issues related to the compatibility among different web browser (plugins) and operating systems, represents an highway for the diffusion of X3d technologies in several application fields. © 2011 acm.

关键词： Virtual reality

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3d environments with games characteristics for teaching history: the VRLerna case study 11

3D environments with games characteristics for teaching hist...

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29th acm international conference on design of Communication, SIGdOC'11

作者： Barbatsis, Kostas Economou, daphne Papamagkana, Ioanna Loukas, dimos Regional Directorate of Primary and Secondary Education of Central Macedonia Thessaloniki Greece School of Electronics and Computer Science University of Westminster W1W 6UW London United Kingdom Department of History and Archaeology Aristotle University of Thessaloniki Thessaloniki Greece Department of Accounting School of Management and Economics A.TEI of Thessaloniki Thessaloniki Greece

ISBN: (纸本)9781450309363

the latest rapid advancement of technology of informatics and communication brought new prospective to education. However, the potential of those technologies could have been exploited further in order to transform students from passive data receivers, to active actors in the learning process. the scope of this paper is the presentation of a theoretical educational framework for the use of interactive three dimensional virtual environments with game characteristics that aims at the initiation of motivation and enhancement of learning. To evaluate the effectiveness of the theoretical framework a prototype educational application called "VRLerna" has been implemented and evaluated with real users. VRLerna is an interactive reconstruction of the central building of a prehistoric population at Lerna of Argolis which is used to teach history at Key stage 5. the paper describes the methodology used to evaluate the prototype and via this the theoretical educational framework and presents the evaluation results that portray the success of the prototype to attract the students interest and keep them engaged and motivated. © 2011 acm.

关键词： Virtual reality

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Reducing maintenance complexity of user-centric web portrayal services 11

Reducing maintenance complexity of user-centric web portraya...

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proceedings of the 16th international conference on 3d web technology

作者： thum, Simon Krämer, Michel Germany

ISBN: (纸本)9781450307741

With the success of applications providing geospatial 3d data to end-users via virtual globes and web-based services, the need for accessing more accurate and up-to-date information has come up. Geodata typically comes from different and unrelated sources, whereas users expect a seamless view which respects their specific needs. A modern geo portrayal service therefore has to deliver information from heterogeneous data sources adapted to specific applications. Each data model introduces limitations that might make it harder to fulfil user requirements. Since in practise user requirements constantly change and data sets are updated, the complexity of configuring and adminstering such a process increases disproportionately to both the number of requirements and data model limitations. To overcome this situation, we outline an approach which seeks to avoid what we call the explosion of interdependencies between formalized requirements and geodata features. Our goal is to keep original data virtually untouched while delivering adapted data to multiple users with specific portrayal requirements. We therefore introduce an intermediate representation (IR) to alleviate the growing complexity of interdependencies from O(n + m) to O(n + m). We adapt this technique to the geospatial domain, deriving a prototypical implementation of an OGC web 3d Service which delivers X3d documents. the service is capable of adapting to user requirements and at the same time serving originally heterogeneous geodata. We introduce the implementation, discuss results and application opportunities. © 2011 acm.

关键词： web services

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Enhancing realism of mixed reality applications through real-time depth-imaging devices in X3d 11

Enhancing realism of mixed reality applications through real...

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proceedings of the 16th international conference on 3d web technology

作者： Franke, Tobias Kahn, Svenja Olbrich, Manuel Jung, Yvonne Fraunhofer Institut für Graphische Datenverarbeitung Darmstadt Germany

ISBN: (纸本)9781450307741

Until recently, depth sensing cameras have been used almost exclusively in research due to the high costs of such specialized equipment. With the introduction of the Microsoft Kinect device, realtime depth imaging is now available for the ordinary developer at low expenses and so far it has been received with great interest from both the research and hobby developer community. the underlying OpenNI framework not only allows to extract the depth image from the camera, but also provides tracking information of gestures or user skeletons. In this paper, we present a framework to include depth sensing devices into X3d in order to enhance visual fidelity of X3d Mixed Reality applications by introducing some extensions for advanced rendering techniques. We furthermore outline how to calibrate depth and image data in a meaningful way through calibration for devices that do not already come with precalibrated sensors, as well as a discussion of some of the OpenNI functionality that X3d can benefit from in the future. © 2011 acm.

关键词： Augmented reality

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X3d binary encoding results for free viewpoint networked distribution and synchronization 11

X3D binary encoding results for free viewpoint networked dis...

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proceedings of the 16th international conference on 3d web technology

作者： Stocker, Herbert Schickel, Peter Bitmanagement Software GmbH Germany

ISBN: (纸本)9781450307741

In this paper we describe the experience of one of the first implementations of X3d binary encoding [X3d] in the BS Contact viewer in terms of download size and parsing speed and present a proposal for the binary distribution of multi-user events implemented in the BS Collaborate server. the following is a study of encoding sizes using binary encoding as well as gzip and bzip2 compression algorithms. the results were measured in the newly developed encoding and parsing code for the FINE (Free-viewpoint Immersive Networked Experience) project [FINE]. It shows that an appropriate example scene, e. g. a stadium can be reduced in size by factor 2 compared to commonly used gzip compression, which implies twice as fast content delivery. Further, the loading speed of the scene is increased by a factor of 2 to 4. the proposed mechanism of transmitting binary messages between clients in a multi-user scenario is an alternative to exchanging XML or JSON [XML]/[JSON] snippets and increases encoding/decoding speed while reducing network bandwidth requirements. © 2011 acm.

关键词： XML

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