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Second Americas Display Engineering and Applications Conference, ADEAC 2005

作者： Antonio-Torres, David Newbury, Paul Lister, Paul F. Centre for VLSI and Computer Graphics School of Science and Technology University of Sussex Brighton East Sussex United Kingdom

Image processing techniques and technological characterisation of OLEDs have been used to develop a visual model of OLED degradation. This model allows the evaluation of degradation profiles and the estimation of the effects of differential aging. Assessment of degradation is enhanced with the modelling of some typical subpixel architectures.

关键词： Light emitting diodes

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On-line conservative learning for person detection

On-line conservative learning for person detection

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2nd Joint IEEE International Workshop on Visual Surveillance and Performance Evaluation of Tracking and Surveillance, VS-PETS

作者： Roth, Peter M. Grabner, Helmut Skočaj, Danijel Bischof, Horst Leonardis, Aleš Graz University of Technology Institute for Computer Graphics and Vision Inffeldgasse 16/11 8010 Graz Austria University of Ljubljana Faculty of Computer and Information Science Tržaška 25 SI-1001 Slovenia

ISBN: (纸本)0780394240

We present a novel on-line conservative learning framework for an object detection system. All algorithms operate in an on-line mode, in particular we also present a novel on-line AdaBoost method. The basic idea is to start with a very simple object detection system and to exploit a huge amount of unlabeled video data by being very conservative in selecting training examples. The key idea is to use reconstructive and discriminative classifiers in an iterative co-training fashion to arrive at increasingly better object detectors. We demonstrate the framework on a surveillance task where we learn person detectors that are tested on two surveillance video sequences. We start with a simple moving object classifier and proceed with incremental PCA (on shape and appearance) as a reconstructive classifier which in turn generates a training set for a discriminative on-line AdaBoost classifier. © 2005 IEEE.

关键词： Object recognition

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High-quality volume rendering with resampling in the frequency domain

High-quality volume rendering with resampling in the frequen...

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7th Joint Eurographics - IEEE VGTC Symposium on Visualization, VisSym 2005

作者： Artner, Martin Möller, Torsten Viola, Ivan Gröller, Meister E. Institute of Computer Graphics and Algorithms Vienna University of Technology Austria School of Computing Science Simon Fraser University Vancouver Canada

ISBN: (纸本)3905673193

This work introduces a volume rendering technique that is conceptually based on the shear-warp factorization. We propose to perform the shear transformation in the frequency domain. Unlike the standard shear-warp algorithm, we allow for arbitrary sampling distances along the viewing rays, independent from the view direction. The accurate scaling of the volume slices is achieved by using the zero padding interpolation property. Finally, a high quality gradient estimation scheme is presented which uses the derivative theorem of the Fourier transform. Experimental results show that the presented method outperforms established algorithms in the quality of the produced images. If the data is sampled above the Nyquist rate the presented method is capable of a perfect reconstruction of the original function. © The Eurographics Association 2005.

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Ship hull fitting using NURBS

Ship hull fitting using NURBS

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2nd Conference on computer graphics, Imaging, and Vision: New Trends 2005

作者： Wen, Ang Swee Shamsuddin, Siti Mariyam Hj Samian, Yahya Department of Graphics and Multimedia Faculty of Computer Science and Information System Universiti Teknologi Malaysia Department of Marine Technology Faculty of Mechanical Engineering Universiti Teknologi Malaysia

ISBN: (纸本)0769523927

Ship hull form module is the main module in ship design. The problem of creating fair ship hull surface is of major importance in computer Aided Ship Design environment. The fairness of these surfaces is generally considered a subjective notion depending on the judgment of the designers (e.g. visually pleasing, devoid of unnecessary bumps or wiggles, satisfying certain continuity requirements). One of the restriction in ship hull design is that the existing details of a ship design on paper or a ship that already been constructed physically couldn't be reconstructed accurately and concisely in a ship hull design software. This problem can take on many different characteristics, depending on the goal of the reconstruction, the origin of the offset, and tools or methods available to tackle the job. All of these must be taken into account in developing the best approach to solving the problem in the most efficient manner. In this research, the implementation of NURBS method is used because it brings the most convincing results. © 2005 IEEE.

关键词： Structural design

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Illustrative visualization

Illustrative visualization

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VIS 05: IEEE Visualization 2005, Proceedings

作者： Viola, Ivan Gröller, Meister E. Hadwiger, Markus Bühler, Katja Preim, Bernhard Sousa, Mario Costa Ebert, David S. Stredney, Don Kanitsar, Armin Bruckner, Stefan Grimm, Sören Svakhine, Nikolai A. Jang, Yun Gaithert, Kelly Tietjen, Christian Krüger, Arno Peitgen, Heinz-Otto Isenberg, Tobias Hintze, Jana Hertel, Ilka Strauß, Gero Institute of Computer Graphics and Algorithms Vienna University of Technology Austria VRVis Research Center Vienna Austria Department of Simulation and Graphics University of Magdeburg Germany Department of Computer Science University of Calgary Canada School of Electrical and Computer Engineering Purdue University United States Ohio Supercomputer Center United States Institute of Computer Graphics and Algorithms Vienna University of Technology Austria VRVis Research Center Vienna Austria Electrical and Computer Engineering Purdue University United States IEEE Austria Department of Computer Science University of Calgary Canada Department of Computer Science Computer Graphics Research Lab. University of Calgary Canada Purdue University United States Ohio Supercomputer Center United States University of Texas Austin United States Interface Laboratory United States Biomedical Applications United States Department of Simulation and Graphics Otto-von-Guericke-University of Magdeburg Germany Otto-von-Guericke-University of Magdeburg FIN/ISG Germany Institute for Simulation and Graphics Department for Computer Science Otto-von-Guericke-University of Magdeburg Universitaetsplatz 2 39106 Magdeburg Germany Center for Medical Diagnosic Systems and Visualization Universitaetsallee 29 28359 Bremen Germany Department of Simulation and Graphics Otto-von-Guericke University of Magdeburg Germany ENT Department University Hospital of Leipzig Germany

ISBN: (纸本)0780394623

The tutorial presents state-of-the-art visualization techniques inspired by traditional technical and medical illustrations. Such techniques exploit the perception of the human visual system and provide effective visual abstractions to make the visualization clearly understandable. Visual emphasis and abstraction has been used for expressive presentation from prehistoric paintings to nowadays scientific and medical illustrations. Many of the expressive techniques used in art are adopted in computer graphics, and are denoted as illustrative or non-photorealistic rendering. Different stroke techniques, or brush properties express a particular level of abstraction. Feature emphasis or feature suppression is achieved by combining different abstraction levels in illustrative rendering. Challenges in visualization research are very large data visualization as well as multi-dimensional data visualization. To effectively convey the most important visual information there is a significant need for visual abstraction. For less relevant information the dedicated image space is reduced to enhance more prominent features. The discussed techniques in the context of scientific visualization are based on iso-surfaces and volume rendering. Apart from visual abstraction, i.e., illustrative representation, the visibility of prominent features can be achieved by illustrative visualization techniques such as cut-away views or ghosted views. The structures that occlude the most prominent information are suppressed in order to clearly see more interesting parts. A different smart way to provide information on the data is using exploded views or other types of deformation. Furthermore intuitive feature classification via 3D painting and manipulation with the classified data including label placement is presented. Discussed non-photorealistic and illustrative techniques from visualization and graphics are shown from the perspective as tools for illustrators from medicine, botany, archeology

关键词： Visualization

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Evaluation of areal touch feedback for palpation simulation

Evaluation of areal touch feedback for palpation simulation

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VIS 05: IEEE Visualization 2005, Proceedings

作者： Park, Jinah Kim, Sang Youn Kyung, Ki Uk Kwon, Dong Soo Computer Graphics and Visualization Laboratory Information and Communications University Korea Republic of Telerobotics and Control Laboratory Korea Advanced Institute of Science and Technology Korea Republic of Samsung Advanced Institute of Technology Korea Republic of

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A closed-loop rate-based contention control for optical burst switched networks

A closed-loop rate-based contention control for optical burs...

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GLOBECOM'05: IEEE Global Telecommunications Conference, 2005

作者： Farahmand, Farid Zhang, Qiong Jue, Jason P. Department of Computer Electronics and Graphics Technology Central Connecticut State University New Britain CT 06050 Mathematical Sciences and Applied Computing Arizona State University West United States Department of Computer Science University of Texas at Dallas Richardson TX 75083

ISBN: (纸本)0780394143

In this paper we describe a rate-based OBS network architecture in which core switch nodes send explicit messages to edge nodes requesting them to reduce their transmission rate on congested links. Within this framework, we introduce a new contention avoidance mechanism called proportional control algorithm with explicit reduction request (PCwER). Through source rate control, PCwER proactively attempts to prevent the network from entering the congestion state. Basic building blocks and performance trade-offs of PCwER are the main focus of this paper. In addition, through a simple fluid model we analyze the characteristics of the algorithm. Our simulation results show that the proposed contention avoidance techniques improve the network utilization and reduce the packet loss probability.

关键词： Closed loop control systems

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On-line Conservative Learning for Person Detection

On-line Conservative Learning for Person Detection

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Joint IEEE International Workshop on Visual Surveillance and Performance Evaluation of Tracking and Surveillance

作者： P.M. Roth H. Grabner H. Bischof D. Skocaj A. Leonardist Graz University of Technology Institute for Computer Graphics and Vision Austria Faculty of Computer and Information Science University of Ljubljana Slovenia

We present a novel on-line conservative learning framework for an object detection system. All algorithms operate in an on-line mode, in particular we also present a novel on-line AdaBoost method. The basic idea is to start with a very simple object detection system and to exploit a huge amount of unlabeled video data by being very conservative in selecting training examples. The key idea is to use reconstructive and discriminative classifiers in an iterative co-training fashion to arrive at increasingly better object detectors. We demonstrate the framework on a surveillance task where we learn person detectors that are tested on two surveillance video sequences. We start with a simple moving object classifier and proceed with incremental PCA (on shape and appearance) as a reconstructive classifier, which in turn generates a training set for a discriminative on-line AdaBoost classifier

关键词： Object detection Visual system Surveillance computer vision Robustness Detectors Layout computer science education Educational programs Educational technology

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Touching Remote Mixed Worlds : Simulation & Reality

Touching Remote Mixed Worlds : Simulation & Reality

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Asian Simulation Conference/The 6th International conference on system Simulation and Scientific Computing

作者： Myoung-Hee Kim Director Center for Computer Graphics and Virtual Reality Professor Department of Computer Science and Engineering Ewha Womans University Seoul Korea Prof.

As virtual environment technology becomes accessible and affordable, there has been an increase in constructing and connecting virtual worlds. Networked virtual environments allow us to meet and interact with people even though they may be located in different parts of the world. It has been employed in many simulative applications such as manufacturing, business, education, medicine and so on. Networked virtual environment can be more realistic and powerful by applying mixed reality technology merging real and virtual worlds. Focusing on the theme about building and connecting mixed worlds, technical issues are analyzed in terms of data acquisition, visualization, interaction, network communication, and so on. Exploring related work of many research laboratories, future possibilities are also discussed.

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Design and implementation of an optical burst-switched network testbed

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IEEE COMMUNICATIONS MAGAZINE 2005年第11期43卷 S48-S55页

作者： Sun, YM Hashiguchi, T Minh, VQ Wang, X Morikawa, H Aoyama, T Researcher of Fujitsu Laboratories Ltd. Member of IEICE. University of Tokyo Japan. Visiting Research Associate Electronic Visualization Laboratory Computer Science Department University of Illinois Chicago. Associate Professor Department of Frontier Informatics University of Tokyo. Professor Department of Information and Communication Engineering Graduate School of Information Science and Technology University of Tokyo. Fellow of IEICE. Member of the IEEE ComSoc Board of Governors

Optical burst switching has been receiving increased attention as a promising technology for building the next-generation optical Internet. This article presents the design and discusses the implementation of an overlay mode optical burst-switched network testbed. A flexible "transceiver + forwarding" edge node architecture is proposed to perform both electronic burst assembly/disassembly and optical burst forwarding. It is designed to provide class of service and wavelength selection for locally generated bursts, and transparency to cut-through bursts. The functional modules of the control plane and related key design issues are presented. In particular, we discuss a scheduling mechanism that efficiently combines two different contention resolutions in space and wavelength domains. Experimental results show the effectiveness of this scheme in reducing burst blocking probability. Furthermore, the performance of the network testbed and corresponding methods of improving it are discussed.

关键词： Internet Wide area networks (computer networks) Broadband communication systems computer networks Telecommunication systems Electronics

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