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Computer Graphics and Applications, 2000. Proceedings. The Eighth Pacific Conference on

Date 5-5 Oct. 2000

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Displaying Results 1 - 25 of 61
  • 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
  • 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
  • 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 (1)  |  Patents (20)
    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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  • Vertex data compression for triangular meshes

    Publication Year: 2000, Page(s):225 - 234
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    In the field of geometry compression, two main compression targets exist. One is triangle connectivity data and the other is vertex position data. The authors propose a novel algorithm to compress the vertex data. A fundamentally different approach taken in the paper is to transform the vertex positions to the model space, a coordinate system formed by the three previously processed vertices. Once... View full abstract»

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  • Blending pipe surfaces with piecewise algebraic surfaces

    Publication Year: 2000, Page(s):175 - 182
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    Given the positions and orientations of several pipe surfaces (cylinders) in 3D space, a scheme for constructing a piecewise algebraic surface to blend the pipe surfaces is presented. The algorithm starts with a suitable partitioning of the 3D space into tetrahedra or prisms in which the algebraic surface patches are defined. Then a smooth piecewise algebraic surface is constructed which meets the... 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 (4)
    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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  • 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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  • 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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  • Virtual spectrophotometric measurements for biologically and physically-based rendering

    Publication Year: 2000, Page(s):398 - 399
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    The main topic of the paper is virtual spectrophotometers, virtual spectrophotometry and strategies for reducing the number of samples required to obtain asymptotically convergent measurements. A brief section on applications of virtual spectrophotometry is presented. This is followed by a careful formulation of virtual spectrophotometers. A virtual spectrophotometer, being a virtual device, is on... View full abstract»

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  • Interactive simulation of surgical cuts

    Publication Year: 2000, Page(s):116 - 442
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    Presents a framework for the interactive simulation of surgical cuts, such as those practiced in surgical treatment. Unlike most existing methods, our framework is based on tetrahedral volume meshes providing more topological flexibility. In order to keep the representation consistent, we apply adaptive subdivision schemes dynamically during the simulation. The detection of collisions between the ... View full abstract»

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  • A method for modeling and rendering dunes with wind-ripples

    Publication Year: 2000, Page(s):427 - 428
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    This paper proposes a method for modeling and rendering realistic desert scenes. A desert terrain includes sand dunes and wind ripples. We use two types of scale models to form them. We render the dunes with the wind-ripples by bump-mapping using LOD (levels of detail) 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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  • 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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  • Interactive rendering method for displaying shafts of light

    Publication Year: 2000, Page(s):31 - 435
    Cited by:  Papers (5)  |  Patents (2)
    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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  • Handling dynamic changes in hierarchical radiosity through interaction meshes

    Publication Year: 2000, Page(s):40 - 436
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1148 KB)

    The paper describes a radiosity method well suited to dynamic changes while requiring less memory compared to classical hierarchical radiosity. Our method relies on the concept of interaction meshes and does not need any computation of links between patches. The light originating at emitters and arriving at a receiving input surface is stored on separate meshes, each one corresponding to an emitte... 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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  • Interpolating and approximating moving frames using B-splines

    Publication Year: 2000, Page(s):154 - 164
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1084 KB)

    The representation of moving geometry entities is an important issue in the fields of CAD/CAM and robotic motion design. We present a method to interpolate the moving frame homogeneously using B-splines. By analysing the matrix representation of the moving frames, a simplified optimization functional is derived and a recursive iteration method is presented for approximating orthogonal frames at an... View full abstract»

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  • Rendering iridescent colors appearing on natural objects

    Publication Year: 2000, Page(s):15 - 433
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1044 KB)

    Iridescent colors appearing on natural objects, such as the feathers of a hummingbird, surfaces inside seashells, and shells of beetles, are beautiful and impressive. The cause of such iridescent colors is interference of light inside multilayer film structures covering the natural objects. The paper proposes a method for realistically rendering iridescent colors appearing on natural surfaces, tak... View full abstract»

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  • Optimized triangle mesh compression using prediction trees

    Publication Year: 2000, Page(s):406 - 407
    Cited by:  Papers (2)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    Recently, a wealth of algorithms for the efficient coding of 3D triangle meshes have been published. All these focus on achieving the most compact code for the connectivity data. The geometric data, i.e. the vertex coordinates, are then coded in an order induced by the connectivity code, which is probably not optimal. This is a pity, as the geometric portion of the data set dominates the code. We ... View full abstract»

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  • Intuitive virtual grasping for non haptic environments

    Publication Year: 2000, Page(s):373 - 457
    Cited by:  Papers (9)
    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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  • Non-distorted texture mapping using variational interpolation

    Publication Year: 2000, Page(s):402 - 403
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    Presents a new efficient texture mapping algorithm for polygonal meshes. Texture coordinates are assigned to the vertices of the mesh using the variational interpolation technique. For each patch to be mapped, the algorithm first samples equidistantly the boundaries of the patch. In order to decrease distortion, the patch is further sampled as uniformly as possible while its texture domain are cor... 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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  • Low cost immersive displays: the cubicle of the future

    Publication Year: 2000, Page(s):370 - 456
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    A number of immersive display technologies have been developed over the past decade. While many of these display technologies have proved to be effective, they are still far too expensive for common use. This paper presents a low cost immersive display device called Vision Space. This device can be viewed as a personal immersive workspace that takes the form of an office cubicle 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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