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检索条件"任意字段=International Symposium on 3D Data Processing Visualization and Transmission"

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Stereo pseudo 3d rendering for web-based display of scientific volumetric data

Stereo pseudo 3D rendering for web-based display of scientif...

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Joint IEEE/EG 7th international symposium on Volume Graphics, VG 2008 and 5th symposium on Point-Based Graphics, PBG 2008

作者： Eng, daniel Chern-Yeow Choe, Yoonsuck Department of Computer Science Texas A and M University College Station TX 77843-3112 United States

ISBN: (纸本)9783905674125

Advancement in high-throughput microscopy technology such as the Knife-Edge Scanning Microscopy (KESM) is enabling the production of massive amounts of high-resolution volumetric data of biological microstructures. To fully utilize these data, they should be efficiently distributed to the scientific research community (e.g., through the Internet) and should be easily annotated and analyzed. Given the volumetric nature of the data, visualizing them in 3d is important. Since we cannot assume that every end user has high-end hardware, an approach that has minimal hardware requirement will be necessary. There are several prominent applications that facilitate the viewing of large collections of images over the web. Google Maps and Google Maps-like interfaces such as *** allow users to pan and zoom 2d images efficiently. However, they do not yet support the rendering of volumetric data in their standard web interface. Thus, we propose a new method of rendering volumetric data over the web that directly uses the raw image stack, without any computation on the data at all. The human visual system has the capability of viewing stereo images in 2d and turn that into a 3d perception. To generate stereo images, we will need to create the effects of depth and binocular disparity using 2d images. By using simple HTML and JavaScript that are computationally cheap, we can accomplish both tasks dynamically in a standard web browser, by overlaying the images with intervening semi-opaque layers. We expect the approach presented in this paper to be applicable to a broader domain, including geology and meteorology. © The Eurographics Association 2008.

关键词： Stereo image processing

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visualization Modeling of Mine Roadway Based on Visual C#

Visualization Modeling of Mine Roadway Based on Visual C#

引用

international symposium on Information Science and Engineering, ISISE

作者： Fenghua Shi Xufeng Li College of Rural and Urban Constructio Agricultural University of Hebei Baoding China Center for Gydrogeology and Environmental Geology CGS Baoding China

As the most important spatial feature of coal mine, roadway takes an important part in construction of digital Mine (dM). If the roadway can be modeled in 3d visualization, people will get its 3d graphic and know the engineering change accurately and in time, not only these, it also helpful for showing the spatial relationships of excavation engineering and orebody, wall rock even the surface diggings. So, 3d visualization of roadway can improve the level of management and efficiency of mine and also good for mine design of safety and environmental. Take the roadway data of dongtan mine of Shandong as example, this paper mainly researches the data processing - arithmetic, modeling method and visualization analyses of roadway based on Visual C# and directX 9.0 C. In detail is building every regular roadway according to the key points of it to realize modeling the 3d roadway through the process of pointrarrlinerarrfacerarrsingle roadwayrarrmulti-roadway. And then combined with the technology of texture mapping and light setting, the author solved some problems of joining the roadway at the turning points and doing some spatial analyses.

关键词： data visualization Road safety delta modulation Graphics Environmental management data mining data processing Arithmetic Buildings Turning

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transmission Performance of Layered-symbol Iterative Interference Cancellation for Single-carrier MIMO Multiplexing

Transmission Performance of Layered-symbol Iterative Interfe...

引用

international symposium on Information Theory and Its Applications

作者： Nakajima, Akinori Kubo, Hiroshi Mitsubishi Electr Corp Informat Technol R&D Ctr Kamakura Kanagawa 2478501 Japan

ISBN: (纸本)9781424420681

One of the promising techniques to achieve high-speed data transmission in limited bandwidth is multi-input multi-output (MIMO) multiplexing. In MIMO multiplexing, signal separation/detection is one of the most important signal processing parts, so that the signal separation/detection schemes have been vigorously researching. Recently, as a promising signal separation/detection scheme, frequency-domain iterative interference cancellation (Fd-IIC) has been proposed. Fd-IIC can achieve good transmission performance which is close to lower bound when QPSK is used. However, the accuracy of signal separation/detection significantly degrades in case of high data modulation. Therefore, in this paper, to improve the accuracy of signal separation/detection, we propose layered-symbol iterative interference cancellation (LSIC). We consider single-carrier (SC) MIMO multiplexing and the achievable frame error rate (FER) performances with LSIC are evaluated by computer simulation to show that LSIC can provide better FER performance than Fd-IIC.

关键词： SC-MIMO multiplexing iterative interference cancellation mobile communication

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High data-Rate Optical Wireless Communications in Passenger Aircraft: Measurements and Simulations

High Data-Rate Optical Wireless Communications in Passenger ...

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6th international symposium on Communication Systems, Networks and digital Signal processing

作者： O'Brien, d. C. Faulkner, G. E. Zikic, S. Schmitt, N. P. Univ Oxford Dept Engn Sci Parks Rd Oxford OX1 3PJ England EADS Innovat Works Munich 81663 Germany

ISBN: (纸本)9781424418756

Airline passengers now expect 'movies on demand', games, telephone and other multimedia services to be provided at their seats, through all classes of service. The cabling and wired infrastructure to provide several hundred such connections is complex, heavy and makes reconfiguring the airliner seating patterns a time-consuming process. Wireless data transmission to seat-back terminals may therefore be advantageous and optical wireless may be an attractive means to achieve this. In this paper we report measurements and simulations of the optical wireless channel inside a mock-up of a commercial airliner cabin. These indicate that careful control of illumination and receiver field of view can create channels with the bandwidths likely to be required.

关键词： Multimedia services

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Virtual Reality Center using immersive curved display

Virtual Reality Center using immersive curved display

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international symposium on Electronics in Marine (ELMAR)

作者： Mojtaba Mesgari Mashadi Hamed Ahmadi Mostafa Mesgari Mashhadi Young Researchers Club Tehran Iran Department of Computer Shahed University Tehran Iran Department of Information Technology Management University of Tehran Tehran Iran

This article is going to describe our effort to build a Virtual Reality Center using several technologies such as 3d world model development, 3d sound generation, mutli-projector cylindrical display and 3d image processing. The virtual reality center uses four data projector to project a large seamless picture to a hemi-cylindrical display from the back of screen. We use dolby digital Surround EX sound system with a 7.1 channel speaker. A software engine does any necessary transformation like intensity and edge blending and image warping to prepare input data for each projector. A stereo camera used to track the viewer who determines the directions with an Infra Red pointer. The camera produces a feedback for server to update the 3d world model. This virtual reality center can be used in different areas like as scientific visualization, industrial design, entertainment applications and training simulators.

关键词： Virtual reality Large screen displays Cameras Industrial training Three dimensional displays Image processing Audio systems Loudspeakers Engines Feedback

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Three dimensional Terrain visualization on the Internet Using NURBS Method

Three Dimensional Terrain Visualization on the Internet Usin...

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IEEE international symposium on Geoscience and Remote Sensing (IGARSS)

作者： Xiao Wang Xiuwan Chen Department of Geography and Planning SUNY College The Institute of Remote Sensing and GIS Peking University China

In this paper, an approach is presented for terrain visualization on the Internet, in which the NURBS method is used for surface fitting conforming to the X3d standard. On the basis of centripetal and cross-sectional models, the dEM can be transformed to an X3d model for Internet transmission. The approach is able to compress data but increase display resolution which can be viewed as the fundamental step of Web3d modeling and transmission.

关键词： Internet Spline Surface topography Surface reconstruction Surface fitting data visualization Geographic Information Systems Power system modeling discrete transforms Geography

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CT Image processing and Medical Rapid Prototyping

CT Image Processing and Medical Rapid Prototyping

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international Conference on BioMedical Engineering and Informatics (BMEI)

作者： Jiman Han Yi Jia School of Engineering University of Turabo Gurabo USA Department of Mechanical Engineering University of Puerto Rico Mayaguez Puerto Rico

In this paper, the three-dimensional (3d) models of body structures from computed tomography (CT) image are reconstructed in SolidWorks by using planar contour method and medical rapid prototyping (MRP) models are performed. This paper reports how to transfer CT image into digital binary matrixes; then, to capture section contour points from medical image per slice, to create B-spline curve with the control points in each layer, to produce 3d solid model construction in SoildWorks environment; finally, to build medical rapid prototyping models by Z corporation printer. This effort is the first to develop image processing 3d visualization in SolidWorks. MRP data from 3d models are created simultaneously. The system performance is tested using truth CT image, and MRP example models of teeth and knee joint were manufactured. The results reveal that the accuracy of 3d reconstruction is acceptable.

关键词： Computed tomography Image processing Biomedical imaging Prototypes Solid modeling Materials requirements planning Image reconstruction transmission line matrix methods Spline Medical control systems

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A MPEG-4 AFX compliant platform for 3d contents distribution in peer-to-peer

A MPEG-4 AFX compliant platform for 3D contents distribution...

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IEEE international Conference on Image processing

作者： Romain Cavagna Christian Bouville Patrick Gioia Jerome Royan Orange Labs IRISA

Although compression of 3d content has been a widely studied topic, adaptive streaming of large virtual scenes is progressively becoming the standard way to share collaborative environments, due to the growing complexity of the shared data. The classical 'download and play' paradigm associated to standalone compression is leaving place to interactive refinements of regions-of-interest, provided given polygon budget and network capability. With the increasing number of applications and potential clients sharing reusable data, the traditional client / server architecture is likely to be over passed by less server-centered protocols, in order to distribute the complex tasks of identifying the selected data to be streamed. In this paper, we present the design and performances of a platform exploiting peer-to-peer transmission and show how the whole setting can be implemented using the MPEG-4 AFX standards.

关键词： MPEG 4 Standard Peer to peer computing Layout Virtual environment Navigation Network servers Virtual reality Bandwidth visualization Surface waves

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Streaming Media Transport Protocols On Basis Of Next Generation Internet

Streaming Media Transport Protocols On Basis Of Next Generat...

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IEEE international symposium on Signal processing and Information Technology (ISSPIT)

作者： Melika Bolic Zlatan Begic Elmir Secerbegovic Directorate Tuzla/Department for packet switched network BH Telecom d.d. Sarajevo Tuzla Bosnia and Herzegovina Source Code d.o.o. Tuzla Bosnia and Herzegovina

Internet's rapid growth promoted the evolutoin of network based applications. Since a particular network application has its special requirements for network topology, many different protocols have been introduced over the last couple of years. Most of these protocols overlap and are redundant in function, which results in bad overall performance of the application and the network. This paper presents an IPv6 QoS-based simple streaming transport protocol (SSTP), which enables the next generation networks to perform better and takes into account the feature of multimedia stream transmission. The protocol has been implemented and deployed in various multimedia based implementations. This paper will not only introduce the background and design thinking behind SSTP, but also describe the SSTP in detail. At last, the paper compares the performance of SSTP and RTP/RTCP, and gives the considerations about improvement of SSTP.

关键词： Streaming media Transport protocols Internet Geographic Information Systems data visualization Control systems Telecommunication control Companies Intelligent systems Marketing and sales

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Real-Time Human Posture Reconstruction in Wireless Smart Camera Networks

Real-Time Human Posture Reconstruction in Wireless Smart Cam...

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international symposium on Information processing in Sensor Networks (IPSN)

作者： Chen Wu Hamid Aghajan Richard Kleihorst Wireless Sensor Networks Laboratory University of Stanford USA NXP Semiconductors Research Eindhoven Netherlands

ISBN: (纸本)9780769531571

While providing a variety of intriguing application opportunities, a vision sensor network poses three key challenges. High computation capacity is required for early vision functions to enable real-time performance. Wireless links limit image transmission in the network due to both bandwidth and energy concerns. Last but not least, there is a lack of established vision-based fusion mechanisms when a network of cameras is available. In this paper a distributed vision processing implementation of human pose interpretation on a wireless smart camera network is presented. The motivation for employing distributed processing is to both achieve real-time vision and provide scalability for developing more complex vision algorithms. The distributed processing operation includes two levels. One is that each smart camera processes its local vision data, achieving spatial parallelism. The other is that different functionalities of the whole line of vision processing are assigned to early vision and object-level processors, achieving functional parallelism based on the processor capabilities. Aiming for low power consumption and high image processing performance, the wireless smart camera is based on an SIMd (single-instruction multiple-data) video analysis processor, an 8051 micro-controller as the local host, and wireless communication through the IEEE 802.15.4 standard. The vision algorithm implements 3d human pose reconstruction. From the live image data from the sensor the smart camera acquires critical joints of the subject in the scene through local processing. The results obtained by multiple smart cameras are then transmitted through the wireless channel to a central PC where the 3d pose is recovered and demonstrated in a virtual reality gaming application. The system operates in real time with a 30 frames/sec rate.

关键词： Humans Smart cameras Wireless sensor networks Image reconstruction Intelligent sensors distributed processing Parallel processing Computer vision High performance computing Image communication

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