By Topic

Proceedings Computer Graphics International 2000

19-24 June 2000

Filter Results

Displaying Results 1 - 25 of 40
  • Proceedings Computer Graphics International 2000

    Publication Year: 2000
    Request permission for commercial reuse | PDF file iconPDF (367 KB)
    Freely Available from IEEE
  • Hybridization techniques for fast radiosity solvers

    Publication Year: 2000, Page(s):269 - 278
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (430 KB)

    The authors study, both theoretically and experimentally some properties of classical linear systems solvers, according to the radiosity assumptions. We prove important properties for some of these solvers which allow the user to choose the best one. We then introduce a new technique, so called hybridization, whose purpose is to increase the convergence speed of iterative methods. It provides very... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Author index

    Publication Year: 2000, Page(s): 353
    Request permission for commercial reuse | PDF file iconPDF (76 KB)
    Freely Available from IEEE
  • Dynamic 3D maps and their texture-based design

    Publication Year: 2000, Page(s):325 - 334
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1316 KB)

    Three-dimensional maps are fundamental tools for presenting, exploring, and manipulating geo data. This paper describes multiresolution concepts for 3D maps and their texture-based design. In our approach, 3D maps are based on a hybrid, multiresolution terrain model composed of data sets having different topological structure, for example a coarse regular grid combined with by triangulated microst... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Visualization of biomedical processes: local quantitative physiological functions in living human body

    Publication Year: 2000, Page(s):319 - 323
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    Functional imaging with dynamic positron emission tomography (PET) has been playing a crucial and expanding role in biomedical research and clinical diagnosis, providing image-wide quantitative and qualitative physiological functions in the human body, and supporting visualization of the distribution of these functions corresponding to anatomical structures. A number of parametric imaging algorith... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • VPARK - a Windows NT software platform for a virtual networked amusement park

    Publication Year: 2000, Page(s):309 - 315
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    Presents the VPARK (Virtual Park) system, which includes a networked virtual environment (NVE) system called W-VLNET and an “attraction building system” that is able to create and modify the attractions used in the NVE. Both systems have been developed in the Windows NT environment. The paper outlines the techniques for communication, scene management, facial and body animation, and ge... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Real-time collision detection and response for complex environments

    Publication Year: 2000, Page(s):105 - 113
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    Presents a method for collision detection that is well suited to complex environments, such as those obtained from medical imaging and for objects that are in permanent contact. The method is based on a point-in-tetrahedral-mesh query. Spatial and temporal coherence are used to achieve interactive speed. In addition to collision detection, the system calculates a force and torque that can be used ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Local and global geometric methods for analysis, interrogation, reconstruction, modification and design of shape

    Publication Year: 2000, Page(s):137 - 151
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2740 KB)

    Gives an overview of some recent methods useful for local and global shape analysis and for the design of solids. These methods include, as new tools for global and local shape analysis, the spectra of the Laplace and Laplace-Beltrami operators and the concept of stable umbilical points, i.e. stable singularities of the “principal curvature line” wire-frame model of the solid's boundar... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Augmented reality for real and virtual humans

    Publication Year: 2000, Page(s):303 - 307
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1812 KB)

    Current virtual reality technologies provide many ways to interact with virtual humans. Most of those techniques, however, are limited to synthetic elements and require cumbersome sensors. We have combined a real-time simulation and rendering platform with a real-time, non-invasive vision-based recognition system to investigate interactions in a mixed environment with real and synthetic elements. ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Using an enhanced LBG algorithm to reduce the codebook error in vector quantization

    Publication Year: 2000, Page(s):99 - 104
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    Presents a modification of the well-known LBG (Linde, Buzo and Gray, 1980) algorithm for the generation of codebooks in vector quantization. Our algorithm, which we call the ILBG (iterated LBG) algorithm, reduces the codebook error of the LBG algorithm drastically in typical applications. In our experiments, we were able to achieve up to a 75% reduction of the codebook error in only a few addition... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Enabling cuts on multiresolution representation

    Publication Year: 2000, Page(s):183 - 191
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Multi-resolution representations are widely used in many data visualization contexts and applications. The adoption of a multi-resolution approach provides the optimal management of a data representation, using at each instant of time a level of detail that is more adequate for the given action or task to be performed. Recently, multi-resolution has also been introduced into the interactive physic... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Orientation lightmaps for photon tracing in complex environments

    Publication Year: 2000, Page(s):279 - 286
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    We present a method that makes the use of photon tracing methods feasible for complex scenes when a totally accurate solution is not essential. This is accomplished by using orientation lightmaps, which average the illumination of complex objects depending on the surface normal. Through this averaging, they considerably reduce the variance of the stochastic solution. In order to use these speciali... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simulated patient for orthognathic surgery

    Publication Year: 2000, Page(s):239 - 245
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (796 KB)

    Orthognathic surgery corrects a wide range of minor and major facial and jaw irregularities. This surgery will improve the patients' ability to chew, speak and breathe. In many cases, a better appearance will also result. With the recent advances in virtual reality (VR) and three-dimensional (3D) medical imaging technology, orthognathic surgery simulations typically requires costly volumetric data... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • X-machines+L-systems=XL-systems

    Publication Year: 2000, Page(s):127 - 134
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    A. Lindenmayer (1968) developed a type of formal language called an L-system. Similar to formal languages, L-systems define a method by which a string of symbols can be rewritten or parsed into another string using a set of rewrite rules. X-machines are generalised state automata. This paper takes another look at this way of generating plants and provides a convenient way of taking component L-sys... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Haptics issues in virtual environments

    Publication Year: 2000, Page(s):295 - 302
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4052 KB)

    Haptics is a recent enhancement to virtual environments, allowing users to “touch” and feel the simulated objects they interact with. Current commercial products allow tactile feedback through desktop interfaces (such as the FEELItTM mouse or the PHANToMTM arm) and dextrous tactile and force feedback at the fingertips through haptic gloves (such as the CyberTouch... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • To gesture or not to gesture: what is the question?

    Publication Year: 2000, Page(s):3 - 9
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    Computer synthesized characters are expected to make appropriate face, limb, and body gestures during communicative acts. We focus on non-facial movements and try to elucidate what is intended with the notions of “gesture” and “naturalness”. We argue that looking only at the psychological notion of gesture and gesture type is insufficient to capture movement qualities neede... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Homological invariants and holorgraphic representations of topological structures in cellular spaces

    Publication Year: 2000, Page(s):89 - 97
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    Geometric modeling and computational representations of shapes have been subject to intense research for more than three decades. Interestingly, these subjects are still at the heart of a continuous activity of research and development in computer graphics, virtual environments, image-based rendering, computer-aided geometric design and physical simulations. Currently, geometric and physically-bas... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • VISJET-a computer ocean outfall modelling system

    Publication Year: 2000, Page(s):75 - 80
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    Sewage and industrial effluents from coastal cities are often discharged into the adjacent sea after some land-based treatment. In modern design, the wastewater is often discharged in buoyant jet groups from risers mounted on a submarine outfall on the seabed to achieve rapid mixing of effluents with tidal flow. A mathematical model for buoyant jets in currents based on the Lagrangian models, call... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • SQUEEZE: fast and progressive decompression of triangle meshes

    Publication Year: 2000, Page(s):173 - 182
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    An ideal triangle mesh compression technology would simultaneously support the following objectives: (1) progressive refinements of the received mesh during decompression, (2) nearly optimal compression ratios for both geometry and connectivity, and (3) in-line, real-time decompression algorithms for hardware or software implementations. Because these three objectives impose contradictory constrai... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Hand gesture animation from static postures using an anatomy-based model

    Publication Year: 2000, Page(s):29 - 36
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Automatic interpretation and animation of human motion has become an important research topic among researchers in virtual reality and computer animation. One major problem encountered during hand motion analysis is the large amount of data that need to be captured and analyzed. Even for a human hand, although only a small part of the body is involved, there are about 30 motion parameters for each... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modeling Murex cabritii sea shell with a structured implicit surface modeler

    Publication Year: 2000, Page(s):55 - 64
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    Implicit surface modeling systems have been used since the mid-1980's for the generation of cartoon like characters. Recently implicit models combined with constructive solid geometry (CSG) have been used to build engineering models with automatic blending. This work is built on a structured implicit modeling system which includes CSG, warping, 2D texture mapping and operations based on the BlobTr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Visualization of dominant region in team games and its application to teamwork analysis

    Publication Year: 2000, Page(s):227 - 235
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The authors present a method for visualization of an invisible feature in human group motion. This feature called “dominant region” is a kind of dynamic sphere of influence. A dominant region is defined as a region in where the person can arrive earlier than any other persons and can be formulated by replacing the distance function in the Voronoi region with a time function. As an appl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Molecular dynamics visualization with XML and VRML

    Publication Year: 2000, Page(s):335 - 341
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    A new Extensible Markup Language (XML) application, Molecular Dynamics Language (MoDL) has been developed. MoDL provides a simple, but powerful tool for molecular dynamics visualization and has been developed by combining, for the first time, the strengths of XML and the Virtual Reality Modeling Language. The details of MoDL, its implementation and examples of its use are presented in this paper View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A homotopy model for cup lifting

    Publication Year: 2000, Page(s):117 - 125
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    Introduces two new theoretical tools - homotopy and cellular structured spaces - for visualization. Any object is represented by a filtration space, which is a sequence of skeletons that are topological spaces. Using an attaching function that attaches n-1 dimensional balls to the boundaries of n-dimensional balls, a filtration space is composed inductively and step-by-step, by increasing the dime... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Crack pattern simulation based on 3D surface cellular automaton

    Publication Year: 2000, Page(s):153 - 162
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    Describes a method for modeling the propagation of cracks on any 3D surface. Taking a previous cellular automata model of the authors (1999) as the basis, this method allows just about any type of cracks on any type of triangulated 3D object. Our model's main advantage is that it proposes a semi-physical solution, making it at the same time user-controllable and easily extendable. After summarizin... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.