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Proceedings the Eighth Pacific Conference on Computer Graphics and Applications

5-5 Oct. 2000

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  • Proceedings the Eighth Pacific Conference on Computer Graphics and Applications

    Publication Year: 2000
    Request permission for commercial reuse | PDF file iconPDF (222 KB)
    Freely Available from IEEE
  • Efficient processing of large 3D meshes

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (35 KB)

    Summary form only given, as follows. Due to their simplicity, triangle meshes are often used to represent geometric surfaces. Their main drawback is the large number of triangles that are required to represent a smooth surface. This problem has been addressed by a large number of mesh simplification algorithms which reduce the number of triangles and approximate the initial mesh. Hierarchical tria... View full abstract»

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  • Optimizing network 3D data transmissions for interactive applications

    Publication Year: 2000, Page(s):419 - 420
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (173 KB)

    3D object data transfer was optimized to accelerate interactive 3D scene design and virtual-space layout applications. In these applications, downloading many 3D objects reduces the interactivity of the clients. We used level-of-detail based loading sequences and timing control methods to interleave data downloading and interactions. Experiments showed that the maximum interval between interaction... View full abstract»

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  • Authors index

    Publication Year: 2000, Page(s):461 - 462
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    Freely Available from IEEE
  • Interactive rendering method for displaying shafts of light

    Publication Year: 2000, Page(s):31 - 435
    Cited by:  Papers (8)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    Recently graphics hardware has increased in capability, and is, moreover, now available even on standard PCs. These advances have encouraged researchers to develop hardware-accelerated methods for rendering realistic images. One of the important elements in enhancing reality is the effect of atmospheric scattering. The scattering of light due to atmospheric particles has to be taken into account i... View full abstract»

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  • Interactive behavioural update of large flocks

    Publication Year: 2000, Page(s):425 - 426
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    The availability of powerful and affordable 3D PC graphics boards has made the rendering of rich immersive environments possible at interactive speeds. The scene update rate and the appropriate behaviour of objects within the world are central to this immersive feeling. We explore new techniques for increasing the efficiency of the flocking algorithm, which has been used extensively to emulate the... View full abstract»

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  • Line-art rendering of 3D-models

    Publication Year: 2000, Page(s):87 - 96
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (916 KB)

    We present an interactive system for computer aided generation of line art drawings to illustrate 3D models that are given as triangulated surfaces. In a preprocessing step, an enhanced 2D view of the scene is computed by sampling for every pixel the shading, the normal vectors and the principal directions obtained from discrete curvature analysis. Then streamlines are traced in the 2D direction f... View full abstract»

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  • Practical texture mapping on free-form surfaces

    Publication Year: 2000, Page(s):97 - 440
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    Concerns the problem of mapping photographic images on to the surface of a 3D object whose geometric data are already known. Although the minimal view selection algorithm of K. Matsushita and T. Kaneko (1999) enables the selection of a minimal number of camera positions, it often results in untextured patches due to camera misalignment: a deviation of actual camera position from the specified posi... View full abstract»

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  • Voxel-coding for tiling complex volumetric objects

    Publication Year: 2000, Page(s):307 - 451
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1412 KB)

    This paper discusses voxel-coding for tiling complex volumetric objects with triangular meshes: first choosing cross-sections followed by extracting contours, and then triangulating them according to a given error threshold. The intervals between adjacent cross-sections and for sampling contour points for the tiling operation are determined by the difference in area between contour projections, en... View full abstract»

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  • Mesh construction from non-uniformly distributed and noisy 3D points recovered from image sequence

    Publication Year: 2000, Page(s):423 - 424
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    This paper describes a novel method for constructing triangle meshes from noisy and non-uniformly distributed 3D points. It consists of two steps: noise point removal uses a clustering algorithm and epipolar constraint method to identify and remove noise points from the 3D points; and a constructive polygonization algorithm interpolates cleaned 3D points to construct a triangle mesh of the object View full abstract»

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  • Cylindrical 3-D video display observable from all directions

    Publication Year: 2000, Page(s):300 - 306
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    We propose a 3-D video display technique that allows multiple viewers to observe 3-D images from a 360-degree horizontal arc without wearing 3-D glasses. This technique uses a cylindrical parallax barrier and a one-dimensional light source array. We have developed an experimental display using this technique and have demonstrated observation of 3-D images from a 360-degree horizontal arc without t... View full abstract»

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  • Subdivision surface fitting with QEM-based mesh simplification and reconstruction of approximated B-spline surfaces

    Publication Year: 2000, Page(s):202 - 212
    Cited by:  Papers (3)  |  Patents (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1076 KB)

    We present a general method for automatically reconstructing a network of B-spline patches based on the Doo-Sabin subdivision surface. This method consists of two parts, surface fitting and surface construction. In surface fitting, mesh simplification based on QEM (Quadric Error Metrics) is used and a control mesh that approximates a Doo-Sabin subdivision surface is constructed. In surface constru... View full abstract»

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  • CubicalPath-dynamic potential fields for guided exploration in virtual environments

    Publication Year: 2000, Page(s):387 - 459
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1096 KB)

    Exploring unknown models or scenes is a highly interactive and dynamic process. Systems for automatic presentation of models or scenes either require cinematographic rules, direct human interaction, framesets or precalculation of paths to a known goal. We are looking for a system which can deal with rapidly changing user interest in objects of a scene or model as well as with dynamic models and ch... View full abstract»

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  • Implementation of a graphics design framework on the Web

    Publication Year: 2000, Page(s):421 - 422
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    We propose a client-server graphics design framework and implement a room design system using CORBA. We have integrated technologies used in distributed computation (Java and CORBA) and computer graphics (VRML). To support multiuser collaborative design, we propose a supplier-consumer communication approach and implement it using the event service in CORBA. Our system can be applied in electronic ... View full abstract»

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  • Constrained and aggregated half space volume decomposition: generating cutting patches with “internal” and “external” extending

    Publication Year: 2000, Page(s):262 - 271
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1264 KB)

    Volume decomposition is a fundamental issue that draws attention from researchers in different disciplines. In many contexts, a solid model that contains shape information needs to be partitioned into smaller simpler or more meaningful sub-models in order to facilitate efficient or effective analysis. Much progress has been made so far on convex decomposition of polyhedra and relatively difficult ... View full abstract»

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  • Modeling an isosurface with a neural network

    Publication Year: 2000, Page(s):165 - 174
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (676 KB)

    Presents a novel method for modeling an isosurface that is defined by an unstructured set of control points. The principle is to model the scalar field underlying the isosurface with a neural network: the inputs of the neural network are the three coordinates of a point in space, and its output is the value of the scalar field at this point. The isosurface is requested to satisfy some constraints ... View full abstract»

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  • Proceedings Seventh International Conference on Parallel and Distributed Systems: Workshops

    Publication Year: 2000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    The following topics were dealt with: parallel and multi-computing; communication and protocol; object-oriented systems; network architecture; image processing; multimedia database and application; Internet application; simulation and scientific visualisation; modelling, animation and virtual reality; quality of service; network performance; security; VPN; mobile computing; parallel computing appl... View full abstract»

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  • Control of feature-point-driven facial animation using a hypothetical face

    Publication Year: 2000, Page(s):359 - 455
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    A new approach for the generation of feature point-driven facial animation is presented. This approach is based on the construction of a hypothetical face formed by connecting face feature points into a net and representing each facet of the net by a mathematically expressed surface to control the deformation of a real face model. The deformation is controlled by changing both the locations of the... View full abstract»

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  • Visibility in the presence of occluders with curved boundaries

    Publication Year: 2000, Page(s):105 - 441
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1084 KB)

    Accurate global visibility information has become essential in global illumination rendering. Combinatorial structures, such as the visibility complex, aspect graphs and the visibility skeleton, are the seeds of a new topic of research motivated by practical problems in computer graphics and global illumination rendering. This is now attracting interest from the computational geometry, combinatori... View full abstract»

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  • Collision adaptive particle systems

    Publication Year: 2000, Page(s):338 - 453
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    Particle systems have been widely employed to simulate deformable objects, most prominently virtual textiles. We introduce particle systems that adaptively generate new particles wherever this is required to model collisions correctly. When coarse meshes collide with an object they are automatically refined. Therefore this model allows physically accurate simulations that require a much smaller nu... View full abstract»

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  • Compression of indoor video sequences using homography-based segmentation

    Publication Year: 2000, Page(s):290 - 450
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1180 KB)

    We present a new compression algorithm for video sequences of indoor scenes, or more generally, sequences containing mostly planar and near-planar surfaces. Our approach utilizes edge and optical flow information in order to segment selected keyframes into regions of general shape, such that the motion of each region is predicted well by a planar homography. With this kind of motion prediction, th... View full abstract»

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  • A new paradigm for changing topology during subdivision modeling

    Publication Year: 2000, Page(s):192 - 201
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1036 KB)

    The authors present a paradigm that allows dynamic changing of the topology of 2-manifold polygonal meshes. Our paradigm always guarantees topological consistency of polygonal meshes. Based on our paradigm, by simply adding and deleting edges, handles can be created and deleted, holes can be opened or closed, polygonal meshes can be connected or disconnected. These edge insertion and edge deletion... View full abstract»

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  • The metric cursor

    Publication Year: 2000, Page(s):381 - 386
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    This paper proposes a new interaction technique for positioning or moving 3D points, which is a basic task in geometric modeling and several other applications. These systems usually make use of a 2D interface with a 2D cursor. However positioning 3D points with a 2D cursor is often done by using several windows, each window displaying a different orthographic projection of the 3D space. This pape... View full abstract»

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  • View-dependent continuous level-of-detail rendering of terrain model

    Publication Year: 2000, Page(s):404 - 405
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    The level-of-detail modeling method is an effective approach for the interactive visualization of complex models. In this paper, we propose a hierarchical tree structure based on the fractal dimension to organize a 3D terrain mesh model and to realize view-dependent continuous level-of-detail rendering of terrain data with a restricted quadtree triangulation method. The total algorithm can be divi... View full abstract»

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  • A matrix-based approach to reconstruction of 3D objects from three orthographic views

    Publication Year: 2000, Page(s):254 - 261
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    Presents a matrix-based technique for reconstructing solids with quadric surfaces from three orthographic views. First, the relationship between a conic and its orthographic projections is developed using matrix theory. We then address the problem of finding the theoretical minimum number of views that are necessary for reconstructing an object with quadric surfaces. Next, we reconstruct the conic... View full abstract»

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