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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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3d volume extraction and mesh generation using energy minimization techniques

3D volume extraction and mesh generation using energy minimi...

引用

international symposium on 3d data processing visualization and transmission

作者： A. doi S. Fujiwara K. Matsuda M. Kameda Faculty of Software and Information Science Iwate Prefectural University Japan

In order to automatically extract an arbitrary 3d region from 3d image data (volume data), we have developed a physics-based approach using a 3d deformable grid model, which we called "3d Active Grid". 3d Active Grid is an extension of 3d deformable surface models, such as "balloon", and "3d Active Net". Unlike 3d deformable surface models, the proposed method enables stable extraction of a 3d region by using both boundary and interior information. Moreover, since the generated geometry data can be input directly into the FEM (finite element method), the 3d Active Grid has many potential applications including virtual simulation of surgery, shape modeling, computer vision, and so on.

关键词： Mesh generation data mining deformable models Solid modeling Computational geometry Finite element methods Application software Computational modeling Computer simulation Surgery

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Reconstruction of Euclidean planes from voxels

Reconstruction of Euclidean planes from voxels

引用

international symposium on 3d data processing visualization and transmission

作者： T.K. Linh School of Science and Technology Chiba University Chiba Japan

We aim to formulate the recognition of a planes from a discrete point set as a nonlinear optimization problem, and we prove a uniqueness theorem for the solution of this problem. We deal with the supercover model in a space for the expression of discrete planes. The algorithm achieves invertible data compression of digital objects, since the algorithm transforms a collection voxels to a collection of plane parameters, which classify the voxels.

关键词： data compression Geometry discrete transforms Character recognition Linear programming Noise robustness Object detection data processing data visualization Hypercubes

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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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A unified representation for interactive 3d modeling

A unified representation for interactive 3D modeling

引用

international symposium on 3d data processing visualization and transmission

作者： d. Tubic P. Hebert J.-d. deschenes d. Laurendeau Computer Vision and Systems Laboratory University of Laval QUE Canada

Interactive 3d modeling is the process of building a 3d model of an object or a scene in real-time while the 3d (range) data is acquired. This is possible only if the computational complexity of all involved algorithms is linear with respect to the amount of data. We propose a new framework for 3d modeling where a complete modeling chain meets with this requirement. The framework is based on the use of vector fields as an implicit surface representation. Each modeling step, registration, surface reconstruction, geometric fusion, compression and visualization is solved and explained using the vector fields without any intermediate representations. The proposed framework allows model reconstruction from any type of 3d data, surface patches, curves, unorganized sets of points or a combination of these.

关键词： Surface reconstruction Computational complexity Real time systems Solid modeling data visualization Vectors Computer vision Laboratories Layout Computational modeling

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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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Shape matching using the 3d Radon transform

Shape matching using the 3D Radon transform

引用

international symposium on 3d data processing visualization and transmission

作者： P. daras d. Zarpalas d. Tzovaras M.G. Strintzis Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece Informatics and Telematics Institute Thessaloniki Greece

A method for 3d model content-based search and retrieval based on the 3d Radon transform and a querying-by-3d-model approach, is presented. descriptors are extracted using the 3d Radon transform and applying a set of functionals on the transform coefficients. Similarity measures are then created for the extracted descriptors and introduced into a 3d model-matching algorithm. This results to a very fast and accurate matching method. Experiments were performed using two different databases and comparing the proposed method with others. Experimental results show that the proposed method can be used for 3d model search and retrieval in a highly efficient manner.

关键词： Shape measurement Solid modeling data mining Histograms Volume measurement Information processing Laboratories Informatics Telematics Information retrieval

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A gesture recognition system using 3d data

A gesture recognition system using 3D data

引用

international symposium on 3d data processing visualization and transmission

作者： S. Malassiotis N. Aifanti M.G. Strintzis Informatics and Telematics Institute Thessaloniki Greece

In this paper a gesture recognition system using 3d data is described The system relies on a novel 3d sensor that generates a dense range image of the scene. The main novelty of the proposed system, with respect to other 3d gesture recognition techniques, is the capability for robust recognition of complex hand postures such as those encountered in sign language alphabets. This is achieved by explicitly employing 3d hand features. Moreover the proposed approach does not rely on colour information, and guarantees robust segmentation of the hand under various illumination conditions, and content of the scene. Several novel 3d image analysis algorithms are presented covering the complete processing chain: 3d image acquisition, arm segmentation, hand-forearm segmentation, hand pose estimation, 3d feature extraction, and gesture classification. The proposed system is tested in an application scenario involving the recognition of sign-language postures.

关键词： Image segmentation Layout Robustness Image recognition Image sensors Sensor phenomena and characterization Sensor systems Handicapped aids Lighting Image color analysis

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3d Content-Based Search Based on 3d Krawtchouk Moments

3D Content-Based Search Based on 3D Krawtchouk Moments

引用

international symposium on 3d data processing visualization and transmission

作者： A. Mademlis A. Axenopoulos P. daras d. Tzovaras M.G. Strintzis Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece Informatics and Telematics Institute Thessaloniki Greece

In this paper a novel method for 3d content-based search and retrieval is proposed. Guided by the imperative need for a reliable 3d content based search tool and the very interesting results of research work done in the past on the performance of Krawtchouk moments and Krawtchouk moment invariants in image processing, Weighted 3d Krawtchouk moments are introduced for efficient 3d analysis which are suitable for content-based search and retrieval applications. The proposed method was tested on Princeton Shape Benchmark. Experiments have shown that the proposed method is superior in terms of precision-recall comparing with other well-known methods reported in the literature.

关键词： Content based retrieval Histograms Shape measurement Principal component analysis Image processing Application software Informatics Telematics Information processing Laboratories

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3d non-linear invisible boundary detection filters

3D non-linear invisible boundary detection filters

引用

international symposium on 3d data processing visualization and transmission

作者： M. Petrou F. Mohanna V. Kovalev Centre for Vision Speech and Signal Processing School of Electronics and Physical Sciences University of Surrey Guildford UK

The human vision system can discriminate regions which differ up to the second order statistics only. A lot of malignant tumours have boundaries which are not visible to the human eye. We present an algorithm designed to reveal "hidden" boundaries in grey level images, by computing gradients in higher order statistics of the data. We demonstrate it by applying it to the identification of possible "hidden" boundaries of gliomas as manifest themselves in MRI 3d scans.

关键词： Image edge detection Tumors detectors Humans Higher order statistics Statistical distributions Filters Signal processing algorithms Machine vision Cancer

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