Eurographics Conferences: Recent submissions

Now showing items 1061-1080 of 2886

    • 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 ...

    • 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 ...

    • A constraint-based UIMS using graph unification 

      Samuel, J. F. (Eurographics Association, 1991)
      This paper describes an experimental UIMS developed to investigate methods of combining and reusing objects within a constraint-based system. A novel approach based on graph-unification facilitated the definition of composite ...

    • Integrating Inheritance and Composition in an Objective Presentation Model for Multiple Media 

      Took, Roger (Eurographics Association, 1991)
      A formal model is presented which combines, in a single structure called a tangle, the power to express both the composition of aggregate objects, and the selective inheritance of object properties over a number of instances ...

    • MOVE-X: A System for Combining Video Films and Computer Animation 

      Ertl, Gerhard; Müller-Seelich, Heimo; Tabatabai, Behnam (Eurographics Association, 1991)
      The objective of the presented project was to implement a system for the visualization of buildings. The system is used to create movies of buildings and interior rooms before they are built. For a realistic impression of ...

    • 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 ...

    • An Algorithm of hidden Surface Removal based on Frame-To- Frame Coherence 

      Tost, Daniele (Eurographics Association, 1991)
      Frame-to-frame coherence capitalizes on the continuity existing between successive frames in order to predict the visibility of the scene at a given instant on the basis of its visibility at the previous instant. It is ...

    • 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 ...

    • Geometric Modelling from Range Image Data 

      Schmitt, Francis; Cken, Xin; Du, Wen-Hui (Eurographics Association, 1991)
      An adaptive surface fitting algorithm is proposed for modelling the digitized surface of a real object described by an array of 3D points sampled on a rectangular mesh and stored in the form of a range image. A G1 -piecewise ...

    • Declarative Graphics And Dynamic Interaction 

      Johnson, C.W.; Harrison, M.D. (Eurographics Association, 1991)
      First order logic provides a means of integrating the specification and prototyping of interactive systems. It can describe graphical images in a declarative and order independent manner. It supports the definition of ...

    • Configurable Representations in Feature-based Modelling 

      Falcidieno, B.; Giannini, F.; Porzia, C.; Spagnuolo, M. (Eurographics Association, 1991)
      A double description is proposed for the representation of a feature-based model which supports the distinction between form and functionality. This description consists of a primary representation in terms of geometric ...

    • 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, ...

    • 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, ...

    • Low Sampling Densities using a psychovisual approach 

      Bouville, Christian; Tellier, Pierre; Bouatouch, Kadi (Eurographics Association, 1991)
      It has long been observed that the keenness of sight is lower for diagonal directions than for horizontal or vertical ones. This anisotropy of the human eye response can be exploited by using a non-orthogonal sampling ...

    • Discrepancy as a Quality Measure for Sample Distributions 

      Shirley, Peter (Eurographics Association, 1991)
      Discrepancy, a scalar measure of sample point equidistribution, is discussed in the context of Computer Graphics sampling problems. Several sampling strategies and their discrepancy characteristics are examined. The ...

    • 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 ...

    • Liberation from Flatland: 3D Interaction Based on the Desktop Bat 

      Slater, Mel; Davison, Allan (Eurographics Association, 1991)
      A novel device for 3D interaction is introduced, the Desktop Bat. This device is an evolutionary development of a mouse. It is like a mouse in that it is used on a desktop, but provides 5 degrees of freedom since in ...

    • A DDA Octree Traversal Algorithm for Ray Tracing 

      Sung, Kelvin (Eurographics Association, 1991)
      A spatial traversal algorithm for ray tracing that combines the memory efficiency of an octree and the traversal speed of a uniform voxel space is described. A new octree representation is proposed and an implementation ...

    • Refinement criteria for adaptive stochastic ray tracing of textures 

      van Walsum, Theo; van Nieuwenhuizen, Peter R.; Jansen, Frederik W. (Eurographics Association, 1991)
      Adaptive stochastic ray tracing is a rendering technique that generates high-quality anti-aliased images by sampling the image in a non-regular pattern that is adaptively refined. Image refinement can be guided by image ...