IEEE Computer Graphics and Applications

Issue 6 • Nov. 1993

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Displaying Results 1 - 10 of 10
  • Parallel volume rendering on a network of workstations

    Publication Year: 1993, Page(s):16 - 23
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    An algorithm for parallel volume rendering on general-purpose workstations connected to a local area network (LAN) is presented. The algorithm is based on an efficient scan-line algorithm for volume rendering of irregular meshes. This algorithm computes images by intersecting the mesh with successive planes defined through each scan line and perpendicular to the screen. These planes are called sca... View full abstract»

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  • Rational Beta-splines for representing curves and surfaces

    Publication Year: 1993, Page(s):24 - 32
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (831 KB)

    The rational Beta-spline representation, which offers the features of the rational form as well as those of the Beta-spline, is discussed. The rational form provides a unified representation for conventional free-form curves and surfaces along with conic sections and quadratic surfaces, is invariant under projective transformation, and possesses weights, which can be used to control shape in a man... View full abstract»

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  • An evaluation of implicit surface tilers

    Publication Year: 1993, Page(s):33 - 41
    Cited by:  Papers (78)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (825 KB)

    The authors review the principal algorithms for the polygonization of implicit surfaces and provide a framework for identifying their conceptual similarities and practical differences. The algorithms' merits are evaluated according to topological disambiguation, implementation complexity, and triangle count. Special attention is devoted to the ambiguity problem, and proposed solutions are analyzed... View full abstract»

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  • Tone reproduction for realistic images

    Publication Year: 1993, Page(s):42 - 48
    Cited by:  Papers (172)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (605 KB)

    Radiosity and other global illumination methods for image synthesis calculate the real world radiance values of a scene instead of the display radiance values that will represent them. Though radiosity and ray tracing methods can compute extremely accurate and wide-ranging scene radiances, modern display devices emit light only in a tiny fixed range. The radiances must be converted, but ad-hoc con... View full abstract»

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  • Visualization of 3D ultrasound data

    Publication Year: 1993, Page(s):50 - 57
    Cited by:  Papers (71)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (718 KB)

    It is suggested that ultrasound data acquisition will play an increasing role in the future of medical imaging. Unlike magnetic resonance imaging (MRI) and computerized tomography (CT), ultrasound offers interactive visualization of underlying anatomy in real time. Additionally, ultrasound equipment costs far less and does not use ionizing radiation or require specialized facilities. The different... View full abstract»

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  • Shell rendering

    Publication Year: 1993, Page(s):58 - 67
    Cited by:  Papers (63)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (919 KB)

    A structure model for volume rendering, called a shell, is introduced. Roughly, a shell consists of a set of voxels in the vicinity of the structure boundary together with a number of attributes associated with the voxels in this set. By carefully choosing the attributes and storing the shell in a special data structure that allows random access to the voxels and their attributes, storage and comp... View full abstract»

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  • Interactively deformable models for surgery simulation

    Publication Year: 1993, Page(s):68 - 75
    Cited by:  Papers (79)  |  Patents (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    A methodology that addresses important issues concerned with the underlying graphical models designed for surgical simulation, as well as issues related to the real-time interactivity with, and manipulation of, these models is presented. The specific application of interest is laparoscopic surgery, which is performed using endoscopes that present a video image of the organs to the clinicians. The ... View full abstract»

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  • Clinical planning support system-CliPSS

    Publication Year: 1993, Page(s):76 - 84
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (767 KB)

    Clinical planning support system (CliPSS), which is software developed to support neurosurgical planning and to enable a surgeon to generate 3-D computed images interactively and simulate sterotactic surgery on them, is discussed. The basic functions of CliPSS, involving section display, editing, extraction, and rendering, are reviewed. A method of thinning the volume of polygonal data for a surfa... View full abstract»

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  • Computer-aided simulation for bone surgery

    Publication Year: 1993, Page(s):86 - 92
    Cited by:  Papers (37)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (583 KB)

    A system for evaluating bone deformities using a 3-D model directly recovered from 2-D images and for simulating surgery is described. It derives a 3-D object representation from only two X-ray images. It also offers user-friendly simulation of bone surgery with low-cost hardware and software. The system exhibits satisfactory behavior for reconstructing the bone shape, providing suitable data for ... View full abstract»

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  • Backface culling snags (rendering algorithm)

    Publication Year: 1993, Page(s):94 - 97
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (309 KB)

    A potential problem in a common implementation of backface culling, a simple trick used in some polygon-based rendering algorithms to reduce the number of polygons that must be considered, is discussed. A solution to this problem and the solution's benefits are presented.<> View full abstract»

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IEEE CG&A bridges the theory and practice of computer graphics. From specific algorithms to full system implementations, CG&A offers a unique combination of peer-reviewed feature articles and informal departments, including product announcements.

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Meet Our Editors

Editor-in-Chief
L. Miguel Encarnação
The QED Group