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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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Image processing in spheric-shaped data using a geographical transformation. Application to bio-cellular imaging

Image processing in spheric-shaped data using a geographical...

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IEEE international symposium on Biomedical Imaging

作者： W. Rekik d. Bereziat S. dubuisson Laboratoire dinformatique de Paris 6 Université Pierre et Marie Curie Paris France

In this article, we put forth the contribution of cartographic map projection in image analysis for 2d and 3d spheric-shaped data. In the 2d case, map projection of the underlying hemispherical surface has the merit to overcome deformations generated by perspective sights. In the 3d case, processing cartographic references of the original spheroid surfaces presents mainly two advantages. On one hand, it decreases significantly the amount of processed data. On the other hand, we avoid extension of exhaustive processes to a higher dimension. We make use of this geographical transformation in several classical image processing applications such as temporal tracking, information visualization, and feature extraction, such as segmentation. These applications are described and results of cell wall simulations are displayed

关键词： Image processing Biological system modeling Feature extraction Shape data mining Optical computing Optical scattering Earth Image sequence analysis data visualization

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Proceedings - 1st international symposium on 3d data processing visualization and transmission, 3dPVT 2002

Proceedings - 1st International Symposium on 3D Data Process...

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1st international symposium on 3d data processing visualization and transmission, 3dPVT 2002

ISBN: (纸本)0769515215

The proceedings contain 130 papers. The topics discussed include: implementation of a shadow carving system for shape capture;rapid shape acquisition using color structured light and multi-pass dynamic programming;remote machinery maintenance system with the use of virtual reality;network protocol for interaction and scalable distributed visualization;an approach to using image-based techniques across unreliable peer-to-peer networks;distributed quantitative evaluation of 3d patient specific arterial models;neuroanatomical imaging: constrained 3d reconstruction using variational implicit techniques;motion-induced error correction in ultrasound imaging;focal region-guided feature-based volume rendering;automated multi-view 3d image acquisition in human genome research;and high-resolution cytometry network project: towards remote and distributed acquisition, processing and visualization of 3d image data in human genome research.

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Visualizing all the fits: Evaluating the quality and precision of parametric images created from direct reconstruction of pet sinogram data

Visualizing all the fits: Evaluating the quality and precisi...

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2006 3rd IEEE international symposium on Biomedical Imaging: From Nano to Macro

作者： Morris, Evan d. Kamasak, Mustafa E. Christian, Bradley T. Tee, Ean Cheng Bouman, Charles A. Indiana University-Purdue University Indianapolis Istanbul Technical University University of Wisconsin Madison Purdue University

ISBN: (纸本)0780395778

We have recently implemented and tested the direct reconstruction of sinogram data to dense images of kinetic model parameters [1]. In addition, we have recently applied our algorithms to brain data acquired with 18F-fallypride imaging of a monkey [2]. As a multi-dimensional parameter estimation exercise, direct reconstruction to parametric images can be thought of as generating thousands of model-fitted curves (the prediction of measured sinograms) simultaneously. Because the resulting parametric images are only as good as the fits to the data, one would like to have a means of evaluating the "goodness of fit" of each of the model-fitted curves. The size of the data set involved (4d PET data) presents unique problems in the visualization of the fits. In this paper, we propose measures to objectively evaluate the "goodness of fit" of the model to the PET sinograms in orders to evaluate the precision of the parametric images and the validity kinetic model. The techniques presented are, in part, extrapolations of standard parameter estimation techniques [3] to multi-dimensional estimates and are adapted to the tomography paradigm. © 2006 IEEE.

关键词： Image analysis

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Proceedings of SPIE : Remote Sensing of the Environment: 15th National symposium on Remote Sensing of China

Proceedings of SPIE : Remote Sensing of the Environment: 15t...

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Remote Sensing of the Environment: 15th National symposium on Remote Sensing of China

ISBN: (纸本)081946256X

The proceedings contain 40 papers. The topics discussed include: a new concept and practice of remote sensing information application: post remote sensing application technology and application case to geology;the analysis for the experiments of high-resolution digital aero-photograph with UAV remote-sensing system;application of POS in correcting images of aero-digital camera with large format array CCd;a new architecture for hyperspectral image compression base on wavelets transformation and fractal composition;an integrated method of raster and vector generating Voronol diagram based on linear quadtree structure;research of desert and sandy desertification land partition in North China based on remote sensing technology;ecological environmental quality assessment of the drainage area of Yangtze River based on MOdIS and in situ data;and research on remote sensing applications and 3d visualization for railway location.

关键词： Remote sensing

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An Efficient Platform for 3d City Model visualization

An Efficient Platform for 3D City Model Visualization

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IEEE international symposium on Geoscience and Remote Sensing (IGARSS)

作者： X. Huang L. Kwoh B. Yuan Y. Tan Center for Remote Imaging Sensing and Processing (CRISP) National University of Singapore Singapore

This paper presents an overview of the design of the system for interactive 3-d visualization of the city model. It uses high resolution images of IKONOS satellite and corresponding camera model of Rational Polynomial Coefficients (RPC) for building texture mapping and orthorectified images for ground texture mapping. The level of detail for both terrain and texture is applied, and 2d virtual memory management system is implemented for efficient visualization.

关键词： Cities and towns Satellites Memory management Cameras Buildings Engines Image resolution Real time systems data visualization Rendering (computer graphics)

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Radar tomography

Radar tomography

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13th Joint international symposium on Atmospheric and Ocean Optics/Atmospheric Physics

作者： Yakubov, V. P. Telpuchovski, E. d. Zepelev, G. M. Klokov, A. V. Moiseenko, N. A. Novik, S. N. Suhanov, d. Ya. Yakubova, O. V. Tomsk State Univ 36 Lenin Ave Tomsk 634050 Russia

ISBN: (纸本)9780819466426

Results of experimental researches on radar sounding of non-uniform mediums and objects with use as multi frequency scanning in a UWB strip (from 0.5 up to 17 GHz), and sub nanosecond impulses are considered. It is shown, that addition of measurements by angular and spatial scanning with SAR technologies to realize 3-d tomography inhomogeneous with the spatial resolutions about I cm at the physical models of interaction of electromagnetic radiation with substance in which dominating mechanisms are allocated lay. It allows to simplify essentially the decision of inverse problems and to use fast algorithms of their realization. Focusing of radiation is carried out with use of mirrors, lenses, and also methods of 3-d coordinated filtrations with regularization. The examples confirming working capacity of a method for without contact tomography of structure of a forest, detection and visualization landmines hidden under a rough surface of sand are resulted. The description of the developed experimental installations is given. It is shown, that using of UWB radiation allows raising considerably accuracy of measurements at preservation of a real time scale of data processing.

关键词： ultra wide band radiation radar tomography

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Multicarrier modulation in advanced wireless communication systems

Multicarrier modulation in advanced wireless communication s...

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48th international symposium ELMAR-2006 on Multimedia Signal processing and Communications

作者： Nogulic, d. Gadze, M. Jankovic, A. Ericsson Nikola Tesla Dd Mobile Networks Krapinska 45 HR-10001 Zagreb Croatia

ISBN: (纸本)9789537044039

The selection of appropriate multiple access tecnology is the main issue in design and development of beyond 3G (B3G) wireless systems. This article considers Orthogonal Frequency-division Multiplexing (OFdM) scheme as a key techinque to implement in next-generation mobile systems. The introduction of OFdM multicarrier technique in new hybrid multiple access technologies should provide a solution for problems limiting current mobile systems, such as sensitivity to multipath conditions, poor bandwidth efficiency, interference and capacity issues, high signal processing complexity and inadequate performance of high-speed data transmission. The theoretical background, characteristics and practical applications of some of the most important multiple access combinations will be reviewed Finally, the implementation of OFdM in existing single carrier 3G systems and coexistence will be shortly addressed in conclusion.

关键词： OFdM MC-CdMA B3G

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Semantic 3d Face Mesh Simplification for transmission and visualization

Semantic 3D Face Mesh Simplification for Transmission and Vi...

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IEEE international Conference on Multimedia and Expo (ICME)

作者： Alessandro Colombo Claudio Cusano Raimondo Schettini DISCo Department of Computer ScienceSystems and Communication University of Milano-Bicocca Italy

Three-dimensional data generated from range scanners is usually composed of a huge amount of information. Simplification and compression techniques must be adopted in order to reduce transmission or processing time and to allow real-time visualization. In this paper we propose an approach to semantic simplification of triangular meshes representing faces. The algorithm is aimed to preserve facial features and can be used especially for face recognition systems purposes. In a first phase we detect salient regions using a 3d face detector based on curvature analysis and holistic classification. In a second phase, vertex decimation is applied to the mesh with different decimation parameters for salient and non salient-regions. We have tested our algorithm on a set of 150 acquisitions obtaining good visual quality meshes with approximately 90% or more of decimated vertexes

关键词： Face detection Face recognition Layout Facial features Biometrics data visualization Phase detection detectors Testing Computer science

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visualization aspects in the MERCW project

Visualization aspects in the MERCW project

引用

IEEE/OES US/EU Baltic international symposium

作者： P. Borodin A. Greß R. Klein University of Bonn Institute of Computer Science II Bonn Germany Rheinische Friedrich-Wilhelms-Universitat Bonn Bonn Nordrhein-Westfalen DE

The MERCW project focuses on the study of chemical munition dump sites in the Baltic Sea and Skagerrak area. Through focused site investigations an assessment will be made of the ecological risks related to the dumped warfare for the marine ecosystem and people. One of the objectives of the project is to illustrate the results from the risk assessment using innovative visualization techniques. Our aim is to develop technology to interactively analyze and explore data that is collected, simulated, and used in the project, in order to support decision-making, risk analysis, and emergency plans. The data to be considered will include detailed bathymetric maps of the sea bottom, different scalar fields defined on the 3d water volume (e.g. temperature, salinity, and concentrations of poisonous substances) as well as vector fields (e.g. sea currents). In order to achieve this goal we will apply and enhance well-established methods of terrain, volume, and flow visualization. Special emphasis will be put on fast techniques that exploit the parallel computing power of current graphics processing units (GPUs). In addition to common visualization techniques, stereo rendering in virtual environments, such as PowerWall and CAVE, will further enhance the perception and understanding of complex 3d phenomena.

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Real-time visualization of 4d cardiac MR images using graphics processing units

Real-time visualization of 4D cardiac MR images using graphi...

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IEEE international symposium on Biomedical Imaging

作者： Qi Zhang R. Eagleson T.M. Peters Biomedical Engineering University of Western Ontario London ONT Canada Imaging Research Laboratories Robarts Research Institute London ONT Canada

ISBN: (纸本)078039576X

Real-time display of dynamic three-dimensional (3d) cardiac images has important applications in minimally invasive image-guided cardiac surgery and therapy. However, in practice, the high computational cost usually prohibits its application in a real-time medical environment, or else the low image quality does not satisfy the clinical requirements. Surface based organ models or orthogonal image planes are often employed instead, but in the process important intra cardiac data are lost, and intuitive spatial anatomical relationships are eliminated. In this paper, we take advantage of the programmability, parallelism and increased computational precision of modern graphics processing units (GPUs) to build a ray casting based real-time 3d rendering engine, directly running on the graphics vertex and fragment processors. This approach provides enhanced image quality similar to software-based implementations, but its rendering speed is competitive with the traditional but inferior quality slice based volume rendering approaches. In addition, we propose a new dynamic volume texture binding technique, and embedded it into our 3d rendering engine to permit visualize the 4d MR cardiac dataset in real-time

关键词： visualization Graphics Rendering (computer graphics) Minimally invasive surgery Image quality Engines Three dimensional displays Medical treatment Computational efficiency Biomedical imaging

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