By Topic

IEEE Computer Graphics and Applications

Issue 1 • Date Jan. 1993

Filter Results

Displaying Results 1 - 9 of 9
  • Imaging cerebral function

    Publication Year: 1993, Page(s):15 - 26
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1808 KB)

    The Scan Analysis and Visualization Processor (Scan/VP), a flexible, portable, Unix-based software package for visualizing and analyzing positron emission tomography (PET) images in a clinical-research setting, is described. PET systems are compared to computerized tomography (CT) and magnetic resonance imaging (MRI) systems. The imaging and software aspects of Scan/VP, and procedures devoted spec... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Voxar project (parallel ray-tracing)

    Publication Year: 1993, Page(s):27 - 33
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    An implementation of the ray-tracing algorithm that is based on the Voxar parallel processing model, which simulates 3D physical phenomena, is discussed. The implementation of a general parallel ray-tracing program, and the implementation of Voxar are reviewed. Results of a performance evaluation of Voxar show that the machine's best points are its efficiency on complex ray-tree images and its par... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An introduction to polar forms

    Publication Year: 1993, Page(s):38 - 46
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (646 KB)

    Polar forms, which simplify the construction of polynomial and piecewise-polynomial curves and surfaces and lead to new surface representations and algorithms, are reviewed. The polar forms of polynomial curves, Bezier curves, and B-spline are discussed. Tensor product surfaces, the most popular surfaces in computer-aided geometric design, true surfaces, Bezier triangles, B-patches, and a triangul... View full abstract»

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

    Publication Year: 1993, Page(s):47 - 52
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (515 KB)

    Triangulations, which play an important role in approximation theory, finite-element methods, numerical analysis, and computer-aided geometric design (CAGD), are defined. Triangulations in the plane, in space, and on the surface of a sphere are discussed. The storing and construction of triangulations are also discussed.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cyclides in surface and solid modeling

    Publication Year: 1993, Page(s):53 - 59
    Cited by:  Papers (6)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (977 KB)

    It is shown that Dupin cyclides (C.P. Dupin, 1822), as surfaces in computer-aided geometric design (CAGD), have attractive properties such as low algebraic degree, rational parametric forms, and an easily comprehensible geometric representation using simple and intuitive geometric parameters. Their alternative representations permit the transition between forms when one or the other is more conven... View full abstract»

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

    Publication Year: 1993, Page(s):60 - 70
    Cited by:  Papers (89)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7208 KB)

    A variety of methods for modeling scattered data are discussed, with an emphasis on two types of data: volumetric and spherical. To demonstrate the performance of the various methods, results from an empirical study using trivariate scattered data are presented. The author's objective is to provide information to aid in selecting a type of method or to form the basis for customizing a method for a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Incremental boundary evaluation using inference of edge classifications

    Publication Year: 1993, Page(s):71 - 78
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (769 KB)

    An incremental boundary-evaluation algorithm that exploits adjacency information in B-reps to minimize the number of explicit edge classifications required is presented. Evaluations of the implemented algorithm show that it performs reliably and well, although global optimization schemes could increase performance significantly. The steps of the algorithm, which include self-edge partitioning, cro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Implicit curves and surfaces in CAGD

    Publication Year: 1993, Page(s):79 - 88
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (983 KB)

    The role of implicit curves and surfaces in computer-aided geometric design (CAGD) are described. The ways in which the study of implicit algebraic curves and surfaces draws on algebraic geometry are reviewed. The implicitization of parametric curves and surfaces, parameterization of implicits, and techniques used to circumvent conversions between implicit and parametric representations are discus... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Surface-to-surface intersections

    Publication Year: 1993, Page(s):89 - 95
    Cited by:  Papers (14)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (711 KB)

    Techniques for computing intersections of algebraic surfaces with piecewise rational polynomial parametric surface patches and intersections of two piecewise rational polynomial parametric surface patches are discussed. The techniques are classified using four categories-lattice evolution methods, marching methods, subdivision methods, and analytic methods-and their principal features are discusse... View full abstract»

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

Aims & Scope

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.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
L. Miguel Encarnação
University of Iowa