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检索条件"任意字段=3rd International Symposium on 3D Data Processing, Visualization, and Transmission, 3DPVT 2006"

共 148 条记录，以下是11-20 订阅

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Linking feature lines on 3d triangle meshes with artificial potential fields

Linking feature lines on 3D triangle meshes with artificial ...

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3rd international symposium on 3d data processing, visualization, and transmission, 3dpvt 2006

作者： Page, d.L. Koschan, A.F. Abidi, M.A. Imaging Robotics and Intelligent Systems Laboratory University of Tennessee Knoxville TN 37996-2100 United States

ISBN: (纸本)0769528252

We propose artificial potential fields as a support theory for a feature linking algorithm. This algorithm operates on 3d triangle meshes derived from multiple range scans of an object, and the features of interest are curvature extrema on the object's surface. A problem that arises with detecting these features is that results from standard algorithms are often incomplete in that feature lines are broken and discontinuous. Our novel linking algorithm closes these broken feature lines to form a more complete feature description. The main contribution of this algorithm is the use of artificial potential fields to govern the linking process. In this paper, we discuss the feature detection process itself and then define the linking procedure in the context of potential fields. We present results for both synthetic and scanned models. © 2006 IEEE.

关键词： Feature extraction

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An improved 3d human face reconstruction approach based on cubic splines models

An improved 3D human face reconstruction approach based on c...

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3rd international symposium on 3d data processing, visualization, and transmission, 3dpvt 2006

作者： Amor, Boulbaba Ben Ardabilian, Mohsen Chen, Liming MI Department Ecole Centrale de Lyon LIRIS Laboratory CNRS 5205 36 av. Guy de Collongue 69134 Lyon France

ISBN: (纸本)0769528252

In this paper, we develop a new hybrid active vision/geometric modeling approach dedicated to 3d human face recovery. Initially, a 3d coarse reconstruction is obtained via a structured-light assisted stereo sensor. Here, the stereo matching problem is resolved through two main stages: (a) sub-pixel stripe edge localization of projected patterns of light, and(b) correspondences establishing based on adaptive dynamic programming optimization technique. Next, the introduction of smooth interpolation models achieves the fine reconstruction. Here, cubic Spline curves are employed in order to improve the quality of the reconstructed models. Indeed, they allow us to produce dense and details preserving reconstructions by following the control points from the coarse reconstruction stage. Furthermore, we present some reconstruction results and discuss both qualitative and quantitative evaluations of the proposed reconstruction scheme. © 2006 IEEE.

关键词： Interpolation

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Hierarchical representation of virtual cities for progressive transmission over networks

Hierarchical representation of virtual cities for progressiv...

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3rd international symposium on 3d data processing, visualization and transmission

作者： Royan, J. Balter, R. Bouville, C. France Telecom R&D Rennes France

ISBN: (纸本)9780769528250

Interactive network-based navigation over large urban environments raises difficult problems due to the size and complexity of these scenes. In this paper, we present a client-server system allowing navigation over 3d cities in real time. due to a novel progressive and hierarchical representation of 3d models of densely built urban areas, only perceptible details for all the regions visible from a given viewpoint are progressively streamed to visualisation clients. Furthermore, efficient coding methods are used to compress the representation data allowing quick start-up of the interactive visualisation with a highly-detailed model. This is achieved through a set of dedicated algorithms allowing a very large city model to be structured into a multi-resolution representation. The method efficiently exploits the fact that most automated modelling techniques of urban scenes provides 2d1/2 models (building footprint, height, altitude, So as to efficiently and faithfully model complex buildings, a procedural representation for roofs and facades is proposed. Finally, we present an MPEG4 compatible implementation based on the introduction of new node types with the associated bitstream.

关键词： visualization

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Building a 3d virtual museum of native American baskets

Building a 3D virtual museum of native American baskets

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3rd international symposium on 3d data processing, visualization and transmission

作者： Isler, Volkan Wilson, Bradford BaJcsy, Ruzena Rensselaer Polytech Inst Dept Comp Sci Troy NY 12180 USA Univ Calif Berkeley Comp Sci Div Berkeley CA 94720 USA Univ Calif Berkeley Dept Comp Sci & Elect Engn Berkeley CA 94720 USA

ISBN: (纸本)9780769528250

In this paper we report our progress in building a system for the acquisition, analysis, and visualization of a collection of Native Californian baskets from the Phoebe A. Hearst Museum of Anthropology. Our project differs from existing cultural heritage applications in terms of its focus: to build tools and techniques for visualizing and studying a large number of related objects - in this case, baskets. We present our progress in the following system components: (i) laser-scanning of baskets, (ii) construction and processing of 3d models, and (iii) building virtual exhibits. We conclude the paper with our experiences and a summary of challenges we anticipate in building a completely automated system for processing and analyzing a large set of models - such as might be encountered when digitizing a large museum collection. Efficient retrieval and visualization of artifact collections are important to a number of communities, including anthropology researchers, Native American tribes, and the general public.

关键词： visualization

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Aerial LidAR data classification using Support Vector Machines (SVM)

Aerial LiDAR data classification using Support Vector Machin...

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3rd international symposium on 3d data processing, visualization and transmission

作者： Lodha, Suresh K. Kreps, Edward J. Helmbold, david P. Fitzpatrick, darren Univ Calif Santa Cruz Dept Comp Sci Santa Cruz CA 95064 USA

ISBN: (纸本)9780769528250

We classify 3d aerial LidAR scattered height data into buildings, trees, roads, and grass using the Support Vector Machine (SVM) algorithm. To do so we use five features: height, height variation, normal variation, LidAR return intensity, and image intensity. We also use only LidAR-derived features to organize the data into three classes (the road and grass classes are merged). We have implemented and experimented with several variations of the SVM algorithm with soft-margin classification to allow for the noise in the data. We have applied our results to classify aerial LidAR data collected over approximately 8 square miles. We visualize the classification results along with the associated confidence using a variation of the SVM algorithm producing probabilistic classifications. We observe that the results are stable and robust. We compare the results against the ground truth and obtain higher than 90% accuracy and convincing visual results.

关键词： LidAR data classification Support Vector Machine (SVM) terrain visualization

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distortion-sensitive synthesis of texture and geometry in interactive 3d visualization

Distortion-sensitive synthesis of texture and geometry in in...

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3rd international symposium on 3d data processing, visualization and transmission

作者： Brusco, Nicola Zanuttigh, Pietro Taubman, david Cortelazzo, Guido Maria Univ New South Wales Sydney NSW Australia Univ Padua I-35100 Padua Italy

ISBN: (纸本)9780769528250

This paper addresses the problem of remote browsing of 3d scenes. Texture and geometry information are both available at server side in the form of scalably compressed images and depth maps. We propose a framework for the dynamic allocation of the available transmission resources between geometry and texture. Both the transmission of new images and the improvement of the already transmitted ones are taken into account. We also introduce a novel strategy for distortion-sensitive synthesis of both geometry and rendered imagery at client side.

关键词： Geometry

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3d content-based search based on 3d Krawtchouk moments

3D content-based search based on 3D Krawtchouk moments

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3rd international symposium on 3d data processing, visualization and transmission

作者： Mademlis, A. Axenopoulos, A. daras, P. Tzovaras, d. Strintzis, M. G. Informat & Telemat Inst 1st Km Thermi Panorama Rd Thessaloniki 57001 Greece Aristotle Univ Thessaloniki Elect & Comp Engn Dept Informat Proc Lab Thessaloniki 54006 Greece

ISBN: (纸本)9780769528250

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： Image processing

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An automatic 3d ear recognition system

An automatic 3D ear recognition system

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3rd international symposium on 3d data processing, visualization and transmission

作者： Yan, Ping Bowyer, Kevin. W. Univ Notre Dame Dept Comp Sci & Engn Notre Dame IN 46556 USA

ISBN: (纸本)9780769528250

Previous works have shown that the ear is a good candidate for a human biometric. However in prior work, the pre-processing of ear images has been a manual process. Also, prior algorithms were sensitive to noise in the data, especially that caused by hair and earrings. We present a novel solution to the automated cropping of the ear and implement it in an end-to-end solution for biometric recognition. We demonstrate our automatic recognition process with the largest study to date in ear biometrics, 415 subjects, achieving a rank one recognition rate of 97.6%. This work represents a breakthrough in ear biometrics and paves the way for commercial quality, fully automatic systems.

关键词： Biometrics

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Isoradius Contours: New representations and techniques for 3d face registration and matching

Isoradius Contours: New representations and techniques for 3...

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3rd international symposium on 3d data processing, visualization and transmission

作者： Pears, Nick Heseltine, Tom Univ York Dept Comp Sci York YO10 5DD N Yorkshire England

ISBN: (纸本)9780769528250

We propose a technique for 3d face registration and matching using a novel representation called "isoradius contours". An isoradius contour is the contour on the 3d facial surface that is a known fixed distance relative to some pre-defined reference point (the tip of the nose). A 3d face representation contains many isoradius contours with different radii and the first major benefit of the technique is that the shape of the contours is independent of the facial pose, due to the infinite rotational symmetry of a sphere. The second major benefit of the technique is that registration, alignment and matching can be implemented using a simple process of Id correlation. Our results have shown that registration and alignment is of comparable accuracy to ICP (iterative closest points), but is fast, non iterative, and is robust to the presence of outliers.

关键词： Iterative methods

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Exploiting 3d spatial continuity for robust automatic horizon matching across faults

Exploiting 3d spatial continuity for robust automatic horizo...

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3rd international symposium on 3d data processing, visualization and transmission

作者： Admasu, Fitsum Toennies, Klaus Univ Magdeburg Comp Vis Grp D-39106 Magdeburg Germany

ISBN: (纸本)9780769528250

Oil and gas exploration decisions are made based on inferences obtained from seismic data interpretation. The interpretation task is getting very time-consuming as seismic data sets become larger Image processing tools such as auto-trackers assist manual interpretation of horizons-visible boundaries between certain sediment layers in seismic data. Auto-trackers assume data continuities;therefore, their assistance is very limited in areas of discontinuities such as faults. In this paper, we present a method for automatic horizon matching across faults based on a Bayesian approach. A stochastic matching model which integrates 3d spatial information of seismic data and prior geological knowledge is introduced. The optimal matching solution is found by MAP estimate of this model. A simulated annealing with reversible jump Markov Chain Monte Carlo algorithm is employed to sample from a-posteriori distribution. The model was applied to real 3d seismic data, and has shown to produce geologically acceptable horizons matchings.

关键词： Simulated annealing

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