Volume 09 (1990): Recent submissions

Now showing items 21-40 of 106

    • A Constraint-Based Figure-Maker 

      Kalra, Devendra; Barr, Alan H. (Eurographics Association, 1990)
      In this paper, we describe a new kind of constraint-based figure-maker for parametrically defined curves. Figures are made by defining objects and imposing constraints on their geometric behavior. We present a formulation ...

    • HYPERIMAGES - AN ALTERNATIVE TO THE CONVENTIONAL DIGITAL IMAGES 

      Bieri, Hanspeter (Eurographics Association, 1990)
      Hyperimages represent a variation of the conventional digital images which implies pixels of different dimensions within the same image. The extent of a hyperimage is the disjoint union of all pixel extents it contains, ...

    • RECONSTRUCTION OF A BOUNDARY REPRESENTATION MODEL FROM THREE ORTHOGRAPHIC PROJECTIONS: A GEOMETRICAL APPROACH 

      Müller, A.; Richter, D. (Eurographics Association, 1990)
      A method is presented for creating a boundary representation model from engineering projections. Although the topic of this reconstruction method has been studied for a few years the fundamentals of reconstruction are ...

    • CHARACTERIZATION OF TOPOGRAPHIC SURFACES 

      Falcidieno, Bianca; Spagnuolo, Michela (Eurographics Association, 1990)
      This paper presents a method for extracting and representang features of a topographic surface approximated by triangular tales An algorithm as given which computes characteristic regions (a. e. regions having concave, ...

    • END USER PROGRAMMING ENVIRONMENTS : INTERACTIVE PROGRAMMING-ON-EXAMPLE IN CAD PARAMETRIC DESIGN 

      Girard, P.; Pierra, G.; Guittet, L. (Eurographics Association, 1990)
      In recent years, the number of computer end-users who do not know programming has increased rapidly. This new phenomenon has spurred a great deal of research about program design using very different approaches from the ...

    • A RASTER GRAPHICS APPROACH TO FLOW VISUALIZATION 

      van Wijk, Jarke J. (Eurographics Association, 1990)
      Most techniques for the visualization of fluid dynamics are based on vector graphics. Streamlines or arrows are calculated as vectors, which are converted to pixels for display on raster devices. The techniques described ...

    • AN INTERPOLATION METHOD FOR STOCHASTIC MODELS 

      Ramstein, G. (Eurographics Association, 1990)
      This paper presents a method using stochastic models for the simulation and interpolation of natural phenomena. These models are based on the general concept of random functions with stationary increments, to which the fbm ...

    • A shadow algorithm for CSG 

      Jansen, Frederik W.; van der Zalm, Arno N. T. (Eurographics Association, 1990)
      An algorithm is presented for constructing shadow volumes for CSG objects. For each primitive solid, the algorithm calculates a tree of shadow volumes to model the shadows generated by the shadow-generating parts of the ...

    • COLOR IMAGE RECONSTRUCTION FROM NONUNIFORM SPARSE SAMPLES USING A THIN PLATE MODEL 

      Metaxas, Dimitris; Milios, Evangelos (Eurographics Association, 1990)
      In this paper we solve the problem of reconstructing a color image from sparse, noisy, and nonuniformly distributed color measurements. We apply a method for reconstructing a surface from sparse depth measurements to each ...

    • AN OBJECT ORIENTED APPROACH TO ENSURE PORTABILITY OF CAD STANDARD PARTS LIBRARIES 

      Pierra, Guy (Eurographics Association, 1990)
      The integration, in CAD systems, of libraries of standard parts is often considered to be one of the key factors for increasing productivity of Computer Aided Design [1] [2] [3]. These libraries must be able to integrate ...

    • A PROPOSAL FOR A POSTSCRIPT 3D EXTENSION 

      Cesar, Christian L. (Eurographics Association, 1990)
      A 3D graphics extension to the PostScript language is proposed. The extension maintains the same graphic programming style that characterizes the language's 2D environment. The extensions proposed cover 3D graphics state, ...

    • Joint Editing with DAPHNE A System integrating CGMs into SGML Documents 

      Scheller, Angela; Fuhrhop, Christian (Eurographics Association, 1990)
      This paper presents DAPHNE, a document processing system for joint editing within the German Research Network DFN. DAPHNE is based on two international standards in the area of document and graphics processing, the Standard ...

    • Cross Scanline Algorithm 

      Tanaka, Toshimitsu; Talcahashi, Tokiichiro (Eurographics Association, 1990)
      This paper proposes a new hidden surface removal algorithm which is based on the scanline algorithm but scans in two directions, horizontally and vertically. Named the cross scanline algorithm, it can efficiently detect ...

    • TRIMO A Workstation-Based Interactive System for the Generation, Manipulation, and Display of Surfaces over Arbitrary Topological Meshes 

      Slusallek, Philipp B.; Seidel, Hans-Peter (Eurographics Association, 1990)
      TRIMO has been designed as a workstation-based interactive system for the generation, manipulation, and display of surfaces over arbitrary toplogical meshes. In addition to rational tensor product Bezier and B-spline ...

    • PRESENTATION OF PRODUCT MODEL DATA -AN INTERFACE BETWEEN GRAPHICS AND CAD- 

      Klement, Kornel (Eurographics Association, 1990)
      The associative visualization of revisable product model data is of great importance for the usefulness and the acceptance of standards in the field of CAD data exchange. The outlines of a separate Presentation module which ...

    • COLOR SHADING IN 2D SYNTHESIS 

      Bourdin, J.J.; Braquelaire, J.P. (Eurographics Association, 1990)
      In interactive 2D synthesis applications, features for filling regions are generally elementary (uniform colouring, filling with a regular pattern.. .). Interactive design of 2D colour shadings raises two major problems: ...

    • ADAPTIVE POLYGONIZATION OF IMPLICIT SURFACES USING SIMPLICIAL DECOMPOSITION AND BOUNDARY CONSTRAINTS 

      Velho, Luiz (Eurographics Association, 1990)
      This paper presents a method to generate a polygonal approximation of implicit surfaces. Space partitioning by simplicial decomposition is used to sample the surface, which provides an unambiguous framework for polygon ...

    • AN INTERACTIVE DEBUGGER FOR PHIGS 

      Howard, T.L.J.; Hewitt, W.T.; Larkin, S. (Eurographics Association, 1990)
      The Programmer’s Hierarchical Interactive Graphics System (PHIGS) is an International Standard for integrating application modelling and interactive computer graphics. With PHIGS, application models are constructed from ...

    • INTERPOLATING CURVE NETWORKS WITH NEW BLENDING PATCHES 

      Saitoh, Tsuyoshi; Hosaka, Mamoru (Eurographics Association, 1990)
      This paper describes methods of c o n s t r u c t i n g s u r f a c e patches which s a t i s f y independently given boundary conditions on a l l i t s four or t h r e e s i d e s . A patch c o n s i s t s of two p a r t ...

    • Factoring a Homogeneous Transformation for a more Efficient Graphics Pipeline 

      Abi-Ezzi, Salim S.; Wozny, Michael J. (Eurographics Association, 1990)
      We identify an intermediate coordinate system situated between world coordinates and display coordinates, which exhibits unique features for lighting calculations and for clipping in homogeneous coordinates. Our key ...