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

ISBN: (纸本)0769528252

The proceedings contain 142 papers. The topics discussed include: towards urban 3d reconstruction from video;3d city modeling using cognitive loops;the recursive multi-frame planar parallax algorithm;image based localization in urban environments;a probabilistic notion of correspondence and the epipolar constraint;carving from ray-tracing constraints: IRT-carving;gaze tracking by using factorized likelihood particle filtering and stereo vision;motion parallax without motion compensation in 3d cluttered scenes;spherical catadioptric arrays: construction, multi-view geometry, and calibration;reconstructing a 3d line from a single catadioptric image;fast and efficient dense variational stereo on GPU;high-performance multi-view reconstruction;and an efficient error-bounded general camera model.

关键词： Stereo image processing

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Proceedings - 3rd international symposium on 3d data processing, visualization, and transmission, 3dpvt 2006: Foreword

Proceedings - Third International Symposium on 3D Data Proce...

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Proceedings - Third international symposium on 3d data processing, visualization, and transmission, 3dpvt 2006 2007年 xiv页

作者： Pollefeys, Marc daniilidis, Kostas

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ISBN: (纸本)0769528252

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Expression compensation for face recognition using a polar geodesic representation

Expression compensation for face recognition using a polar g...

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

作者： Mpiperis, Iordanis Malassiotis, Souris Strintzis, Michael G. Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki 541 24 Greece Informatics and Telematics Institute Centre for Research and Technology Hellas 1st Km Thermi-Panorama Rd Thessaloniki 57001 Greece

ISBN: (纸本)0769528252

This paper addresses the problem of face recognition in the presence of facial deformations caused by expressions. An isometric mapping between surfaces is assumed, which allows preservation of geodesic distance between facial points. Subject to this assumption, we propose a novel technique which integrates 2d and 3d information to establish a new deformation invariant representation of the face. The 3d surface is used to define a polar geodesic coordinate space which is independent of the intrinsic geometry of the face. The corresponding color image is embedded in this space and serves as the recognition data. A preceding stage of hierarchical diffeomorphic grid-based image warping before the recognition process combined with a lip segmentation technique are also employed to increase the overall performance of the algorithm. © 2006 IEEE.

关键词： Face recognition

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Multimodal 3d shape recovery from texture, silhouette and shadow information

Multimodal 3D shape recovery from texture, silhouette and sh...

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

作者： Ballan, Luca Cortelazzo, Guido Maria Univ Padua Dept Informat Engn I-35131 Padua Italy

ISBN: (纸本)9780769528250

Recent efforts attempt to combine together information of different passive methods. Critical issues in this research are the choice of data and how to combine such data in order to increase the overall information. The combination of stereo matching and silhouette information has recently received considerable attention both for obtaining high quality 3d models and for modelling 3d dynamic scenes. In this paper we present a 3d shape recovery system which fuse together silhouette, texture and shadow information. More precisely, we formulate the fusion problem of these three types of information. Experimental verification shows that the new method is capable to reconstruct a wider range of objects.

关键词： visualization

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Automatic locating of anthropometric landmarks on 3d human models

Automatic locating of anthropometric landmarks on 3D human m...

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

作者： Azouz, Zouhour Ben Shu, Chang Mantel, Anja Visual Information Technology Group Institute for Information Technology National Research of Canada Ottawa K1A 0R6 Canada Stuttgart University of Applied Sciences Schellingstr.24 Stuttgart 70174 Germany

ISBN: (纸本)0769528252

We present an algorithm for automatic locating of anthropometric landmarks on 3d human scans. Our method is based on learning landmark characteristics and the spatial relationships between them from a set of human scans where the landmarks are identified. The learned information is formulated by a pairwise Markov network. Each node of the network is a random variable corresponding to the position of a landmark. The edges of the network represent correlations between the positions of landmark pairs. Probabilistic inference is then performed over the Markov network to locate the landmarks. We evaluated the algorithm on 30 human models with different shapes. The results showed good accuracy for most of the landmarks. ©2006 IEEE.

关键词： Three dimensional computer graphics

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A high-resolution and high accuracy real-time 3d sensor based on structured light

A high-resolution and high accuracy real-time 3D sensor base...

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

作者： Forster, Frank Siemens AG D-81730 Munich Germany

ISBN: (纸本)9780769528250

A new real-time 3d sensor is presented that is capable of delivering 25 high-resolution depth maps per second with a representative measurement error of 0.2 mm. The sensor is well suited for real-world application as it imposes no major scene constraints, i.e. it copes well with colored objects, moving scenes and background illumination. The acquisition technique, which is a form of structured light with a single projection pattern, is introduced, where the focus is on two aspects: Firstly, a new type of projection pattern that employs local color edge patterns for encoding so that it is possible to decode them even under noisy real. world conditions. Secondly, an algorithm that exploits the pattern properties to recognize the projected color edge patterns reliably. It then describes a 3d sensor based on this technique and presents experimental results obtained with it. It furthermore discusses an exemplary commercial application of the 3d sensor to the task of wheel alignment.

关键词： Layout Image edge detection Image segmentation Reflectivity Color data processing Lighting Encoding decoding Pattern recognition

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d>3d Face Recognition with Region Committee Votingd>

<bold>3D Face Recognition with Region Committee Voting</bold...

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

作者： Faltemier, Timothy Bowyer, Kevin Flynn, Patrick Univ Notre Dame Dept Comp Sci & Engn Notre Dame IN 46545 USA

ISBN: (纸本)9780769528250

In this paper, we introduce a new system for face recognition by matching 3d face shape. This algorithm selects multiple regions of the face for matching in an attempt to reduce the effects caused by variations in expression between gallery and probe images. Experimental results are reported using the Face Recognition Grand Challenge v2.0 data set. Our results demonstrate improved performance relative to those of four previous papers using this same data set.

关键词： visualization

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Retrieval of colored 3d models

Retrieval of colored 3D models

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

作者： Cortelazzo, G.M. Orio, N. Department of Information Engineering University of Padova Padova Italy

ISBN: (纸本)0769528252

The number of 3d models that are available from the Web is increasingly growing, motivating the research on content-based retrieval from shape information. In this paper we propose to extend the approach to colored 3d models, which start to become more and more popular. To this end we propose a content descriptor that combines together shape and color information and it is based on an extension of spin-images, where also texture information is taken into account. The proposed approach has been evaluated on a collection of 600 automatically colored 3d models, considering as relevant to a query only the models with the same shape and the same added texture. Results show that the approach gave good results in terms of retrieval effectiveness, also if compared to a pure shape-based approach. Issues related to computational cost have been addressed proposing two alternative improvements that have been evaluated and compared with the basic approach. © 2006 IEEE.

关键词： Content based retrieval

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A modular scheme for 2d/3d conversion of TV broadcast

A modular scheme for 2D/3D conversion of TV broadcast

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

作者： Knorr, Sebastian Imre, Evren Zkalayci, Burak Özkalayci Alatan, A. Aydin Sikora, Thomas Communication Systems Group Technische Universität Berlin Einsteinufer 17 Berlin Germany EEE Department Middle East Technical University Balgat 06531 Ankara Turkey

ISBN: (纸本)0769528252

The 3d reconstruction from 2d broadcast video is a challenging problem with many potential applications, such as 3dTV, free-viewpoint video or augmented reality. In this paper, a modular system capable of efficiently reconstructing 3d scenes from broadcast video is proposed. The system consists of four constitutive modules: tracking and segmentation, self-calibration, sparse reconstruction and, finally, dense reconstruction. This paper also introduces some novel approaches for moving object segmentation and sparse and dense reconstruction problems. According to the simulations for both synthetic and real data, the system achieves a promising performance for typical TV content, indicating that it is a significant step towards the 3d reconstruction of scenes from broadcast video. © 2006 IEEE.

关键词： Augmented reality

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Conics-based homography estimation from invariant points and pole-polar relationships

Conics-based homography estimation from invariant points and...

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

作者： Conomis, Christos Heinrich Hertz Inst Nachrichtentech Berlin GmbH Fraunhofer Inst Telecommun D-10587 Berlin Germany

ISBN: (纸本)9780769528250

In this paper we derive a novel set of projective invariants and we address the problem of homography estimation between two uncalibrated views from two unmodeled coplanar conics. Exploring in each view the eigenvectors of a matrix composed from the conics matrices and pole-polar relationships, we show that homography can be recovered purely geometrical from invariant points and simple intersections avoiding high-order polynomials and non linear equations. Our method has advantages compared with other approaches, is simple and computational efficient. The estimation process is basically linear and there are no ambiguities on the solution. Furthermore it requires neither that the physical models of the conics are known nor that the cameras are calibrated. Experimental results in both simulate data and real images show that our approach is very robust and can be efficiently used for a large number of applications

关键词： transmission line matrix methods Polynomials Geometry Cameras Image reconstruction Computer vision Layout Robustness Application software Calibration

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