Browsing Volume 10 (1991) by Title

Now showing items 47-65 of 65

    • Sampling and Anti-Aliasing of Discrete 3-D Volume Density Textures 

      Sakas, Georgios; Gerth, Matthias (Eurographics Association, 1991)
      In recent years, a number of techniques have been developed for rendering volume effects (haze, fog, smoke, clouds, etc.) in order to enhance reality in computer-generated imagery as well as to improve the performance of ...

    • Search for the Intersection Polygon of any Two Polygons: Application to the Garment Industry 

      Mangen, Alain; Lasudry, Nadine (Blackwell Science Ltd and the Eurographics Association, 1991)
      One of the biggest problems usually encountered by the clothes manufacturer consists of placing various pattern parts on a rectangular area in such a way that the waste of material between the pieces is minimized.To bring ...

    • Serial cuttings matching: An application to muscle fiber characterization 

      Buche, Patrice (Eurographics Association, 1991)
      In this paper, we present one important aspect of a complete application of numerical image analysis in biology. We want to analyse a biological object through serial cuttings to measure morphological and biochemical ...

    • Several approaches to implement the merging step of the split and merge region segmentation 

      Popovic, M.; Chantemargue, F.; Canals, R.; Bonton, P. (Eurographics Association, 1991)
      The purpose of this paper is to propose several approaches for the implementation of the merging step of split and merge region segmentation. The splitting step has already been studied and its parallelization has subsequently ...

    • Shading with Area Light Sources 

      Tanaka, Toshimitsu; Takahashi, Tokiichiro (Eurographics Association, 1991)
      This paper derives a shading model for area light sources which covers both diffuse and specular reflection. The shading model assumes ideally diffuse polygonal light sources and uses Phong’s reflection model. The model ...

    • The Shortest Way to Draw a Connected Picture 

      Seebold, Patrice; Slowinski, Karine (Blackwell Science Ltd and the Eurographics Association, 1991)
      With any word over the alphabet ?=r, r?, u, u, we associate a connected picture in the following manner: the reading of each letter of this word induces a unit line: r (r?, u, u respectively) stands for a right (left, up, ...

    • Simultaneous Generation of Stereoscopic Views 

      Adelson, Stephen J.; Bentley, Jeffrey B.; Chong, In Seok and Hodges, Larry F. and Winograd, Joseph (Blackwell Science Ltd and the Eurographics Association, 1991)
      Currently almost all computer graphic stereoscopic images are generated by doubling the work required to create a single image. In this paper we derive and analyze algorithms for simultaneous generation of the two views ...

    • Solid-Interpolating Deformations: Construction and animation of PIPs 

      Kaul, Anil; Rossignac, Jarek (Eurographics Association, 1991)
      Computer programs that simulate the deformations of geometric shapes have played a key role in the increasing popularity of software tools for artistic animation. Previously published techniques for specifying and animating ...

    • A Survey of Several Root-Finding Methods in the Complex Plane 

      Szyszkowicz, Mieczyslaw (Blackwell Science Ltd and the Eurographics Association, 1991)
      In this paper a few classes of root-finding iterative methods are presented and used in the complex plane to solve the equation z4? 1 = 0. These methods are studied using computer graphics techniques.

    • A Symmetrical Input/Output Model 

      Carlsen, Niels Vejrup; Christensen, Niels Jorgen (Eurographics Association, 1991)
      When choosing a graphics system for the run-time support component of a User Interface Management System (UIMS) several problems arise. Existing inputloutput models employed by graphics systems lack support for fine grain ...

    • Tessellation of Curved Surfaces under Highly Varying Transformations 

      Abi-Ezzi, Salim S.; Shirman, Leon A. (Eurographics Association, 1991)
      We pursue the problem of step size determination for tessellating arbitrary degree polynomial and rational Bezier patches, under highly varying modeling and viewing transformations, to within post-viewing size and/or ...

    • A Testbed for Architectural Modeling 

      Hall, Roy; Bussan, Mimi; Georgiades, Priamos; Greenberg, Donald P. (Eurographics Association, 1991)
      This paper describes the philosophy and implementation of a modeling system that is easy to use yet addresses some of the difficulties of design. It does this by supporting concurrent schematic and geometric representations, ...

    • A Testbed for Image Synthesis 

      Trumbore, Ben; Lytle, Wayne; Greenberg, Donald P. (Eurographics Association, 1991)
      Image Synthesis research combines new ideas with existing techniques. A collection of software modules that provide such techniques is extremely useful for simplifying the development process. We describe the design and ...

    • Time Complexity of Monte Carlo Radiosity 

      Shirley, Peter (Eurographics Association, 1991)
      The time complexity of Monte Carlo radiosity is discussed, and a proof is given that the expected number of rays required to produce a satisfactory radiosity solution for N zones is O(N). A satisfactory solution is defined ...

    • Timewarps: A Temporal Reparameterization Paradigm for Parametric Animation 

      Smith, Jeff; Drewery, Karin (Eurographics Association, 1991)
      The ability to reparameterize the temporal axis in an animated sequence is a powerful and underexplored tool. Timewarps are described as extensions to previous work and the advantages of this tool are outlined. Timewarps ...

    • Triangle Sets in PHIGS PLUS: a Valuable Link with Finite Element Modeling 

      Bakker, Miente (Blackwell Science Ltd and the Eurographics Association, 1991)
      At the ISO/IEC editing meeting on PHIGS PLUS1 in Villars sur Ollon, Switzerland from 9 to 14 September 1990, an additional output primitive was added to PHIGS PLUS: TRIANGLE SET 3 WITH DATA together with its 2D shorthand. ...

    • Using temporal and spatial coherence for accelerating the calculation of animation sequences 

      Gröller, Eduard; Purgathofer, Werner (Eurographics Association, 1991)
      Ray tracing is a well known technique for generating realistic images. One of the major drawbacks of this approach are the extensive computational requirements for image calculation. When generating animation sequences ...

    • Validity Issues for Modular Boundary Models 

      Bruzzone, Elisabetta; De Floriani, Leila (Eurographics Association, 1991)
      Modular boundary models are a class of solid models which describe a solid object as a collection of face-abutting object parts, called components. The Face-to-Face Composition (FFC) model is a specific model of this class, ...

    • Variable-Radius Blending by Using Gregory Patches in Geo- metric Modeling 

      Harada, T.; Konnoa, K.; Chiyokura, H. (Eurographics Association, 1991)
      Blending surfaces, which connect two curved surfaces smoothly, often appear in geometric modeling. Many of the blending surfaces are variable-radius blends. Variableradius blending surfaces are very important in the design ...