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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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Audio effects to enhance spatial information displays

Audio effects to enhance spatial information displays

引用

international symposium on 3d data processing visualization and transmission

作者： d. Rocchesso Dipartimento Informatica Universita Verona Verona Italy

Vision and hearing are inherently different perceptual systems. The vision system is tuned to extract spatial information of surfaces and edges, while the auditory system is better suited to detect the temporal behavior of sources. However there are spatial audio effects that can be used to overcome some limitations of visual displays, especially when time-varying complex scenarios have to be rendered, and when the visual display devices are limited in size and complexity. We review some spatial sound effects and give hints for applications in information visualization.

关键词： Auditory displays Frequency Headphones Azimuth Auditory system data processing data visualization Books Filtering delay

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New imaging frontiers: 3d and mixed reality

New imaging frontiers: 3D and mixed reality

引用

international symposium on 3d data processing visualization and transmission

作者： E. Badique IST Programme European Commission Brussels Belgium

For the first time since computers were available, the major pieces of the puzzle are in place to deliver interactive 3d to the average end user. Yet, with the exception of games and some E-commerce applications, the take-up of 3d remains slow. This paper surveys current issues related to the potential of 3d for IST applications and gives an overview of activities most relevant to 3d research. The EU's 6/sup th/ Framework Programme is also briefly discussed and orientations for the integration of imaging and 3d research are proposed.

关键词： Virtual reality Application software Computer graphics TV Motion pictures Bandwidth Boosting Libraries data structures MPEG 4 Standard

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3d mesh wavelet coding using efficient model-based bit allocation

3D mesh wavelet coding using efficient model-based bit alloc...

引用

international symposium on 3d data processing visualization and transmission

作者： F. Payan M. Antonini 13S laboratory CNRS University of Nice-Sophia Antipolis Sophia-Antipolis France

In this paper, we propose an efficient low complexity geometry compression scheme for densely sampled irregular 3d meshes. This scheme is based on 3d multiresolution analysis (3d discrete wavelet transform) and includes a model-based bit allocation process across the wavelet subbands. Coordinates of 3d wavelet coefficients are processed separately and statistically modeled by a generalized Gaussian distribution. This permits an efficient allocation even at low bitrate with very low complexity. Moreover, we introduce predictive geometry coding of LF subbands by taking into account the correlation of the coarsest level coefficients. Finally, we use the EBCOT coder to efficiently encode the quantized coefficients.

关键词： Bit rate Hafnium Quantization data processing data visualization Rate distortion theory Wavelet coefficients Gaussian distribution Computational geometry Solid modeling

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Fast 3d model acquisition from stereo images

Fast 3D model acquisition from stereo images

引用

international symposium on 3d data processing visualization and transmission

作者： L.-P. Morency A. Rahimi T. darrell Artificial Intelligence Laboratory MIT Cambridge MA USA

We propose a fast 3d model acquisition system that aligns intensity and depth images, and reconstructs a textured 3d mesh. 3d views are registered with shape alignment based on intensity gradient constraints and a global registration algorithm. We reconstruct the 3d model using a new cubic ray projection merging algorithm which takes advantage of a novel data structure: the linked voxel space. Finally, we present experiments to test the accuracy of our approach on 3d face modeling using real-time stereo images.

关键词： Merging Image reconstruction Shape Cameras Artificial intelligence data structures Testing Buildings Calibration Feedback

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Posture recognition and segmentation from 3d human body scans

Posture recognition and segmentation from 3D human body scan...

引用

international symposium on 3d data processing visualization and transmission

作者： N. Werghi Yijun Xiao Department of Computing Sciences University of Glasgow Glasgow UK

This paper addresses the problem of segmenting 3d scan data of human body (HB) into sets corresponding to the HB parts, where the posture of the body is unknown. The approach consists of recognizing first the posture, then exploiting the information retrieved from the posture recognition into the segmentation process. For the recognition, the wavelet transform coefficients are suggested as new 3d shape descriptors. Then segmentation technique integrating the model posture information is presented. The segmentation results are illustrated on human body scans of different postures.

关键词： Humans Wavelet transforms Shape Biological system modeling Information retrieval Medical services Biomedical equipment Avatars Motion pictures Games

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Volume rendering on the Internet

Volume rendering on the Internet

引用

international symposium on 3d data processing visualization and transmission

作者： Wen Qi Zhijian Song Guoqiang Wu Department of Biomedical Engineering Medical Center of Fudan University Shanghai China Institute of Communication Technology Swiss Federal Institute of Technology Zurich Switzerland

Volume rendering is a well-developed technology for visualization. It had been used for medical data visualization in both research and clinic. The massive growths of the Internet and the World Wide Web lead us to a completely new way of looking at the development and distribution of visualization software. Using Java as programming language, we developed the 3d applet that rendered medical images on Internet. The client upload their 2d images, visit WWW server to get the 3d results of renderings. It changes traditional computing mode and realizes the share of information. It provides the tool for telemedicine visualization. different organ images are shown in this paper. The results are clear enough to be involved for clinical diagnosis and proved this method to be practical.

关键词： Internet data visualization Biomedical imaging Medical diagnostic imaging Rendering (computer graphics) Web sites Java Computer languages World Wide Web Web server

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Ellipsoid decomposition of 3d-models

Ellipsoid decomposition of 3D-models

引用

international symposium on 3d data processing visualization and transmission

作者： S. Bischoff L. Kobbelt Computer Graphics Group RWTH Aachen Germany

In this paper we present a simple technique to approximate the volume enclosed by a given triangle mesh with a set of overlapping ellipsoids. This type of geometry representation allows us to approximately reconstruct 3d-shapes from a very small amount of information being transmitted. The two central questions that we address are: how can we compute optimal fitting ellipsoids that lie in the interior of a given triangle mesh and how do we select the most significant (least redundant) subset from a huge number of candidate ellipsoids. Our major motivation for computing ellipsoid decompositions is the robust transmission of geometric objects where the receiver can reconstruct the 3d-shape even if part of the data gets lost during transmission.

关键词： Ellipsoids Piecewise linear approximation Robustness Shape Surface reconstruction Computer graphics Information geometry Clouds displays Piecewise linear techniques

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Mathematical aspects of shape reconstruction from an image sequence

Mathematical aspects of shape reconstruction from an image s...

引用

international symposium on 3d data processing visualization and transmission

作者： A. Imiya K. Kawamoto Media Technology Division Institute of Media and Information Technology Chiba University Chiba Japan

It is possible to decompose a three-dimensional objects into a collection of shadows. The geometric relation permits one to decompose shadows of a three-dimensional object to shadows of planar objects. Using this geom... 详细信息

关键词： Shape Image reconstruction Image sequences Lighting Information technology Read only memory Euclidean distance Cameras transmission line matrix methods Computer Society

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Uncalibrated 3d metric reconstruction and flattened texture acquisition from a single view of a surface of revolution

Uncalibrated 3D metric reconstruction and flattened texture ...

引用

international symposium on 3d data processing visualization and transmission

作者： C. Colombo A. del Bimbo F. Pernici Dipartimento di Sistemi e Informatica Florence Italy

We describe a geometric approach for reconstructing 3d textured graphical models of surface of revolution (SOR) objects from a single uncalibrated view Our approach is based on the fact that, for the object class of interest, the structure of the scene provides enough constraints for camera calibration even from a single view. Reconstruction (up to a scaling factor) of 3d shape is complemented with the extraction of flattened 2d texture, so as to support visual retrieval from 2d/3d cues anti to generate realistic 3d visualization models. The approach developed is quite simple, yet accurate and robust; its applications range from the preservation, analysis and classification of cultural heritage, to advanced graphics and multimedia.

关键词： Surface reconstruction Surface texture Graphical models Layout Cameras Calibration Shape visualization Robustness Cultural differences

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Extraction and description of 3d (articulated) moving objects

Extraction and description of 3D (articulated) moving object...

引用

international symposium on 3d data processing visualization and transmission

作者： K.J. Sharman M.S. Nixon J.N. Carter Department of Electronics and Computer Science University of Southampton UK

We seek to extract the three-dimensional motion of articulated objects by passive sensing. We first develop a multi-view system that segments objects from the background before their subsequent analysis by a motion model. To reduce the effects of noise, we also perform 3d reconstruction prior to motion analysis to improve the extraction of the (static) background. The 3d extraction and motion analysis are both performed by evidence gathering, thus accruing optimality of performance. These new analyses are supported by a new representation which describes 3d data with optimal fidelity.

关键词： Layout Motion analysis Image reconstruction data mining Image analysis Image sequence analysis Intersymbol interference Computer science Noise reduction Background noise

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