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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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  • 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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  • 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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  • Arbitrary precise orientation specification for layout of text

    Publication Year: 2000, Page(s):80 - 86
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    A novel method for the layout of text strings over some given free-form parametric base curves is considered. Each letter of the string is represented by a collection of cubic and linear Bezier curves. The layout of the string over the free-form parametric curve is derived as a symbolic composition of the string geometry (i.e. a sequence of Bezier curves) and a free-form parametric surface S(u, v)... View full abstract»

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  • Acceleration of Monte Carlo path tracing in general environments

    Publication Year: 2000, Page(s):71 - 439
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    The paper describes a two pass algorithm capable of computing solutions to the global illumination in general environments (diffuse or glossy surfaces, anisotropically scattering participating media) faster than previous methods, by combining the strengths of finite element and Monte Carlo methods. A quick coarse solution is first computed with a clustered directional hierarchical method. This int... 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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  • Simulating the aurora borealis

    Publication Year: 2000, Page(s):2 - 432
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1024 KB)

    We present an algorithm to simulate the aurora borealis, commonly known as the “northern lights”, a natural phenomenon of great visual beauty and considerable scientific interest. The algorithm is based on the current understanding of the physical origin of the aurora. This natural display is mainly caused by high-energy electrons originating in the Sun and entering the Earth's atmosph... View full abstract»

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  • Morphing using curves and shape interpolation techniques

    Publication Year: 2000, Page(s):348 - 454
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    This paper presents solutions to the feature correspondence and feature interpolation problems in image morphing. The user specifies the correspondence between the source and the target images by drawing input curves on the features of the objects. The correspondence between these curves at the finest level (pixel level) is computed by optimizing a cost function. Based on this correspondence, the ... View full abstract»

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  • Simulation of FLIR and LADAR data using graphics animation software

    Publication Year: 2000, Page(s):126 - 134
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1408 KB)

    Presents an implementation of forward-looking infrared (FLIR) and laser radar (LADAR) data simulation for use in developing a multi-sensor data-fusion automated target recognition (ATR) system. Through the use of commercial models and software, we can create a highly detailed scene model, which provides a rich data set for later processing. We embed our own modules within this software to extract ... 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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  • Efficient coding of non-triangular mesh connectivity

    Publication Year: 2000, Page(s):235 - 242
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    Describes an efficient algorithm for coding the connectivity information of general polygon meshes. In contrast to most existing algorithms, which are suitable only for triangular meshes and pay a penalty for the treatment of non-triangular faces, this algorithm codes the connectivity information in a direct manner. Our treatment of the special case of triangular meshes is shown to be equivalent t... View full abstract»

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  • Intuitive virtual grasping for non haptic environments

    Publication Year: 2000, Page(s):373 - 457
    Cited by:  Papers (12)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    This paper presents an approach for grasping virtual objects in virtual environments with a data glove. Our focus lies on developing new methods that allow sensible realistic grasping gestures which correspond to human grasping behavior. To meet the demands of industrial applications, users must be able to grasp an object in an intuitive way with one or two hands and, beyond that, manipulate grasp... View full abstract»

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  • The intersection of two ringed surfaces

    Publication Year: 2000, Page(s):146 - 444
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Presents an efficient and robust algorithm to compute the intersection curve of two ringed surfaces, each being the sweep ∪ uCu generated by a moving circle. Given two ringed surfaces ∪uC1u and ∪vC2v, we formulate the condition C 1u∩C2v≠Ø (i.... View full abstract»

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  • A new adaptive density estimator for particle-tracing radiosity

    Publication Year: 2000, Page(s):62 - 438
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1256 KB)

    In particle-tracing radiosity algorithms, energy-carrying particles are traced through an environment for simulating global illumination. Illumination on a surface is reconstructed from particle “hit points” on the surface, which is a density estimation problem (B.W. Silverman, 1986). Several methods can be used to solve this problem, such as the adaptive meshing method (R.F. Tobler et... View full abstract»

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  • Progressive geometry compression for meshes

    Publication Year: 2000, Page(s):408 - 410
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    A novel progressive geometry compression scheme is presented in this paper. In this scheme, a mesh is represented as a base mesh followed by some groups of vertex split operations using an improved simplification method in which each level of the mesh can be refined into the next level by carrying out a group of vertex split operations in any order. Consequently, the progressive mesh (PM) represen... 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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  • 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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  • 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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  • Triangular Bezier clipping

    Publication Year: 2000, Page(s):413 - 414
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB)

    Introduces a new approach to finding ray-patch intersections with triangular Bernstein-Bezier patches of arbitrary degree. Unlike the approach of W.Sturzlinger (1998), which was based on a combination of hierarchical subdivision and a Newton-like iteration scheme, this work extends the concept of Bezier clipping to the triangular domain. The problem of reporting wrong intersections, which was inhe... View full abstract»

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  • Interactive manipulation planning for animated characters

    Publication Year: 2000, Page(s):417 - 418
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    Presents a brief overview of an algorithm for interactively animating object grasping and manipulation tasks for human figures. The technique is designed to efficiently generate feasible single-arm manipulation motions given high-level task commands. For moving an object, the motions necessary for a human arm to reach and grasp the object, re-position it and return the arm to rest are generated au... 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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