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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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depth image-based rendering of 3-d object on mobile device

Depth image-based rendering of 3-D object on mobile device

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Proceedings of 2004 international symposium on Intelligent Signal processing and Communication Systems, ISPACS 2004

作者： Jang, Gyeong Ja Kim, Keun Ho Park, In Kyu Samsung Advanced Institute of Technology San 14-1 Yongin-si Gyeonggi-do 449-712 Korea Republic of School of Information and Communication Engineering INHA University 253 Yonghyun-dong Nam-gu Incheon 402-751 Korea Republic of

ISBN: (纸本)0780386396

In this paper, we propose an algorithm for high speed visualization of depth image-based 3-d graphic data, which can be used effectively for the mobile devices. The proposed approach consists of three steps: reading a set of reference, i.e. texture and depth, images of a 3-d object, performing 3-d warping of the reference images, and splatting each pixel in back-to front order to obtain the final rendered image. Experimental results show that the proposed algorithm increases the rendering speed when it runs on a mobile device like personal digital assistant (PdA). ©2004 IEEE.

关键词： Object recognition

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Application of 3d remote sensing technique in tour resources investigation

Application of 3D remote sensing technique in tour resources...

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IEEE international symposium on Geoscience and Remote Sensing (IGARSS)

作者： Xiaotao Li Xiaoning Song Fengjie Yang Department of Earth Science Shandong University of Science and Technology Taian China Department of Earth Science GSCAS Beijing China

ISBN: (纸本)0780387422

Remotely sensed imagery can reflect characteristics of sceneries, such as the formation, structure and spatial correlation etc, in order to make people know the surface matters form a macroscopic and holistic view. However, two dimension plane showed in remote sensing image could not get the 3d space in the realistic world reappearance. As the 3d visualization technique is used wider and wider, the visualization processing on the basis of remote sensing technique not only ensures the realization of the real-time 3d visualization, but also is better for the interpretation of remote sensing image. This article discusses a simple and feasible way of recurring the 3d remote sensing image taking Mount Taishan as an example. At the same time, by means of intuitionistic character of the 3d image, the characteristic of geology structures, physiognomy and environment in this area could be evaluated combining with other correlated data. In the end, the types of physiognomy landscape are divided and the distribution character is depicted. This study enhances the practicability of remote sensing technique, as well as, it takes positive effect on the planning and development of tour resources of Mount Taishan

关键词： Remote sensing Geoscience Space technology data visualization Satellites digital elevation models Geology Shape Image analysis Cultural differences

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depth image-based rendering of 3d object on mobile device

Depth image-based rendering of 3D object on mobile device

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IEEE international symposium on Intelligent Signal processing and Communication Systems (ISPACS)

作者： Gyeong Ja Jang Keun Ho Kim In Kyu Park Samsung Advanced Institute of Technology Yongin si Gyeonggi South Korea School of Information and Communication Engineering INHA University Incheon South Korea

ISBN: (纸本)0780386396

We propose an algorithm for high speed visualization of depth image-based 3d graphic data, which can be used effectively for mobile devices. The proposed approach consists of three steps: reading a set of reference, i.e. texture and depth, images of a 3d object; performing 3d warping of the reference images; splatting each pixel in back-to-front order to obtain the final rendered image. Experimental results show that the proposed algorithm increases the rendering speed when it runs on a mobile device such as a personal digital assistant (PdA) or a cellular phone.

关键词： Rendering (computer graphics) Graphics Personal digital assistants Pixel Hardware Layout Animation visualization Paper technology Mobile communication

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Remote visualization using resource monitoring technique for volume rendering of large datasets

Remote visualization using resource monitoring technique for...

引用

symposium on Applications and the Internet (SAINT)

作者： Y. Ebara Y. Watashiba K. Koyamada K. Sakai A. doi Kyoto University Sakyo Kyoto Japan Iwate Prefectural University Iwate Japan

We present a remote visualization using resource monitoring technique for volume rendering which breaks a large volume data into pieces (sub-volumes) so as to maintain volume rendering processing in physical memory in consideration of the available system resources. Each sub-volume is transferred to a rendering PC (personal computer), which performs hardware accelerated volume rendering and generates a partial image (sub-image). The sub-images are piled up in depth order to complete the final image. This technique has been applied to remote visualization of 3d finite element analysis result of 3d flow through a lateral saccular aneurysm, and we evaluated at remote places between Kyoto and Iwate. As a result, we showed that it is possible to perform rendering of large dataset that surpasses the available resource on the client side, and our technique was effective the remote visualization.

关键词： Remote monitoring Rendering (computer graphics) data visualization Computerized monitoring Microcomputers Hardware Acceleration Image generation Finite element methods Aneurysm

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A "brick" caching scheme for 3d medical imaging

A "brick" caching scheme for 3D medical imaging

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IEEE international symposium on Biomedical Imaging

作者： Jianchun Li R. Shekhar C. Papachristou EECS Department Case Western Reserve University Cleveland USA Cleveland Clinic Foundation Cleveland USA

ISBN: (纸本)0780383885

This paper presents a "brick" caching scheme for a broad range of 3d medical imaging algorithms, which achieves a cache hit ratio of 100% and significantly reduces the total data-flow from the system memory to the caches, thus reducing the memory bandwidth requirement of the system. With data indexing and duplication, this scheme supports multiple parallel memory access required in most 3d imaging algorithms. Brick prefetching strategy fetches data into the cache before they are used, therefore preventing the stall of the processing pipeline. The applications of the caching scheme in FdK cone beam reconstruction and 3d image registration were presented as examples. This caching scheme will be used in our FPGA-based 3d medical imaging coprocessor and it can also be applied to other FPGA-based 3d imaging accelerators.

关键词： Biomedical imaging Image reconstruction Random access memory Coprocessors Ultrasonic imaging Field programmable gate arrays Indexing Pipelines data visualization Bandwidth

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digital representation and multimodal presentation of archeological graffiti at Pompei

Digital representation and multimodal presentation of archeo...

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5th international symposium on Virtual Reality, Archaeology and Intelligent Cultural Heritage, VAST 2004

作者： Balzani, M. Callieri, M. Fabbri, M. Fasano, A. Montani, C. Pingi, P. Santopuoli, N. Scopigno, R. Uccelli, F. Varone, A. Univ. of Ferrara Italy C.N.R. Pisa Italy Soprintendenza Archeologica di Pompei Italy

ISBN: (纸本)3905673185

Graffiti is a special form of art which gives us important knowledge on culture and social life of a lost civilization. Unfortunately, they are usually engraved on soft and non durable materials. The project described here originated from the request for a new approach to the preservation, study and ubiquitous access to Pompei's graffiti. A multidisciplinary team was setup to design a new methodology to support the digital acquisition, the study and the presentation to the public of this peculiar type of Cultural Heritage. We have investigated the use of 3d scanning technologies and graphics modelling to produce accurate digital reconstructions and to enhance them for an improved readability. The specific issues have been considered and ad hoc solutions have been devised. In terms of presentation, we have provided both visual media (interactive visualization) and physical reproduction, obtained by adopting modern rapid reproduction techniques. The work described is a sort of preliminary feasibility study: we are now planning to apply this methodology on a much wider scale at Pompei. © The Eurographics Association 2004.

关键词： visualization

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Projection matrix decomposition in AR - a study with Access3d

Projection matrix decomposition in AR - a study with Access3...

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international symposium on Mixed and Augmented Reality (ISMAR)

作者： Xiang Zhang Siemens Corporate Research Inc. Princeton NJ USA

Access3d is an AR application developed for industrial maintenance. An important feature of Access3d is that, in addition to visualization, it allows the user to inquire further information, directly from the AR view through the hyperlinks. In Access3d, we use VRML for visualization, the advantage is the direct database inquiry through the hyperlinks. On the other hand, VRML requires explicit camera parameters for the virtual camera modeling. Explicit camera calibration is often obtained from projection matrix computation (PMC) followed by projection matrix decomposition (PMd). The PMd is known to be numerically bistable, this is a problem of great importance and research interest in computer vision. different methods, including data normalization have been introduced for finding numerically stable algorithms. Our analysis shows that even if data normalization is applied to the PMC step, a non-favorite distribution of the 3d points may still cause error in the results and numerical instability. This paper provides a look at the numerical instability of PMd from a different point of view.

关键词： Matrix decomposition Cameras transmission line matrix methods Calibration Matrix converters Computer errors Computer vision High definition video data visualization Spatial databases

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Channel allocation and handover for the HSCSd service in SdMA systems

Channel allocation and handover for the HSCSD service in SDM...

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15th IEEE international symposium on Personal, Indoor, Mobile, Radio Communications (PIMRC 2004)

作者： Hartmann, C Tech Univ Munich Inst Commun Networks D-80333 Munich Germany

ISBN: (纸本)0780385233

In order to increase the traffic capacity of F/TdMA based cellular systems like, e.g. GSM, SdMA techniques can be applied. In such systems the base stations are equipped with antenna arrays and appropriate signal processing capabilities.. which enable directional transmission on the downlink as well as directional reception on the uplink. Channels (frequencies/time slots) can then be multiply used within the cell as long as the RRM secures sufficient spatial separability among users sharing a channel. Channel allocation and handover strategies for such systems have been investigated for instance in [1], [2], [3], [4]. To increase the user data rate in systems like GSM, the High Speed Circuit Switched data (HSCSd) Service has been introduced. In HSCSd, several channels can be pooled together for a single user in order to multiply its data rate by means of multi-slot operation. The time slots allocated to a HSCSd user must be allocated on a single GSM carrier. For this purpose we propose new algorithms for HSCSd channel allocation and handover. Specifically the new algorithms consider SdMA operation, i.e. sharing of time slots within the cell. The resulting capacity is investigated by means of multi cell system simulations.

关键词： SdMA HSCSd multi-slot operation smart antennas channel allocation capacity

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Full parallel process for multidimensional wave digital filtering via multidimensional retiming technique

Full parallel process for multidimensional wave digital filt...

引用

IEEE international symposium on Circuits and Systems (ISCAS)

作者： Chien Hsun Tseng S. Lawson School of Engineering University of Warwick Coventry UK

As an alternative approach to the numerical integration of PdEs representing physical systems, the Md-WdF techniques has become of importance due to its attractive features such as massive parallelism and high accuracy inherent in nature. Speed-up efficiencies in terms of achieving fully parallel computing were studied for a 2d-WdF model of the linear transmission line using the chained Md retiming technique. To further explore parallel processing in Md-WdF models using the same pipelining technique, this paper presents the full parallelism for a 3d-WdF model of the linearised shallow water equations (SWEs), which is important in fluid dynamics. Experimental results show that the 3d-WdF model can achieve its full parallelism provided that at most seven parallel processors are each able to implement one multiplication and one addition on one time unit. These results can be extended to nonlinear SWEs, which encounters huge amount of data handling and specific nonlinear optimization problems arising from system modelling.

关键词： Multidimensional systems digital filters Filtering Parallel processing Pipeline processing transmission lines Fluid dynamics data handling Finite element methods Concurrent computing

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dT-MRI data visualisation using the dual tree complex wavelet transform

DT-MRI data visualisation using the dual tree complex wavele...

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IEEE international symposium on Biomedical Imaging

作者： N. Kingsbury A. Zymnis A. Pena Signal Processing Group Engineering Department University of Cambridge Cambridge UK Engineering Department Signal Processing Group University of Cambridge Cambridge UK Department of Radiology and Academic Neurosurgery Unit University of Cambridge Cambridge UK

In this paper a novel visualisation method for diffusion tensor MRI datasets is introduced. This is based on the use of complex wavelets in order to produce "stripy" textures which depict the anisotropic component of the diffusion tensors. Grey-scale pixel intensity is used to show the isotropic component. This paper also discusses enhancements of the technique for 3d visualisation.

关键词： diffusion tensor imaging data visualization Wavelet transforms Tensile stress Eigenvalues and eigenfunctions Anisotropic magnetoresistance Magnetic resonance imaging data engineering Signal processing Radiology

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