EG1992: Recent submissions

Now showing items 21-39 of 39

    • Adaptive Sampling of Area Light Sources in Ray Tracing Including Diffuse Interreflection 

      Kok, Arjan J. F.; Jansen, Frederik W. (Blackwell Science Ltd and the Eurographics Association, 1992)
      Ray tracing algorithms that sample both the light received directly from light sources and the light received indirectly by diffuse reflection from other patches, can accurately render the global illumination in a scene ...

    • Area Sampling Buffer: Tracing Rays with Z-Buffer Hardware 

      Sung, Kelvin (Blackwell Science Ltd and the Eurographics Association, 1992)
      An algorithm that allows the use of z-buffer hardware in assisting area sampling for a ray tracing style renderer is described. The implementation issues involved in discretizing the sampling area and light source area are ...

    • Accurate Image Generation and Interactive Image Editing with the A-buffer 

      Lau, Wing Hung; Wiseman, Neil (Blackwell Science Ltd and the Eurographics Association, 1992)
      The A-buffer suggested by Carpenter [2] is a hidden surface removal method which deals with arbitrary overlapping edges in a pixel. In this paper, we suggest a way of increasing the subpixel resolution by storing the bitmask ...

    • A line clipping algorithm and its analysis 

      Krammer, Gergely (Blackwell Science Ltd and the Eurographics Association, 1992)
      One of the classical problems of Computer Graphics: line clipping against a rectangle is revisited. Coordinate raster refinement and some unusual forms of the parametric equation of the line are used to develop formulae ...

    • The Input Model of Standard Graphics Systems Revisited by Formal Specification 

      Faconti, Giorgio P.; Zani, Nicola; Paterno , Fabio (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper describes the specification of an input model for graphics systems. The initial aim of the work reported in this paper was to revise the input model adopted by graphics standards by means of formal specification ...

    • A Run-Length Slice Line Drawing Algorithm without Division Operations 

      Fung, Khun Yee; Nicholl, Tina M.; Dewdney, A. K. (Blackwell Science Ltd and the Eurographics Association, 1992)

    • Modelling the Texture of Paint 

      Cockshott, Tunde; Patterson, John; England, David (Blackwell Science Ltd and the Eurographics Association, 1992)

    • Visual Composition and Multimedia 

      de Mey, Vicki; Breiteneder, Christian; Dami, Laurent; Gibbs, Simon and Tsichritzis, Dennis (Blackwell Science Ltd and the Eurographics Association, 1992)
      Multimedia applications can be seen as sets of autonomous parts, independent yet capable of working together. This assumption allows for the construction of multimedia applications in a"connectionist" fashion. In this paper ...

    • Affine Texture Mapping and Antialiasing Using Integer Arithmetic 

      Nehlig, P.; Ghazanfarpour, D. (Blackwell Science Ltd and the Eurographics Association, 1992)
      Texture mapping techniques are very useful for generating more realistic images. However, texture compression, generally induced by geometric transformations, is at the origin of aliasing artifacts especially the ...

    • The Parametric Differential Method: An Alternative to the Calculation of Form Factors 

      Baranoski, Gladimir V. Guimaraes (Blackwell Science Ltd and the Eurographics Association, 1992)
      The parametric differential method calculates the form factors without using approximations by polygons. Because of this it contributes to the improvement of the realism of the images synthesised through the radiosity ...

    • Radiosity in Flatland 

      Heckhert, Paul S. (Blackwell Science Ltd and the Eurographics Association, 1992)
      The radiosity method for the simulation of interreflection of light between diffuse surfaces is such a common image synthesis technique that its derivation is worthy of study. We here examine the radiosity method in a two ...

    • An adaptive Discretization Method For Radiosity 

      Languenou, Eric; Bouatouch, Kadi; Tellier, Pierre (Blackwell Science Ltd and the Eurographics Association, 1992)
      When using radiosiiy, the visual quality of the rendered images strongly depends on the method employed for discretizing the scene into patches. A too fine discretization may give rise to artifacts, while with a coarse ...

    • Fast Generation and Surface Structuring Methods for Terrain and Other Natural Phenomena 

      Koh, Eng-Kiat; Hearn, D. D. (Blackwell Science Ltd and the Eurographics Association, 1992)
      Fractal geometry has proven to be a powerful tool for modeling natural phenomena. Using discrete approximations to fractional Brownian motion over a finite grid plane, computer graphics terrain-rendering algorithms are ...

    • A Unified Approach for Physical and Geometric Modeling for Graphics and Animation 

      Essa, Irfan A.; Sclaroff, Stan; Pentland, Alex (Blackwell Science Ltd and the Eurographics Association, 1992)
      We present a unified approach for geometric and physical modeling using implicit functions, for application to graphics and animation. This method extends previously proposed techniques, and allows the standard finite ...

    • The Visualization Input Pipeline - Enabling Semantic Interaction in Scientific Visualization 

      Felger, W.; Schroder, F. (Blackwell Science Ltd and the Eurographics Association, 1992)
      Scientific Visualization systems are primarily output-oriented, Users can specify and change parameters that are controlling the visualization process, which will result in different data representations or images respectively. ...

    • Template-Based Volume Viewing 

      Yagel, Roni; Kaufman, Arie (Blackwell Science Ltd and the Eurographics Association, 1992)
      We present an efficient three-phase algorithm for volume viewing that is based on exploiting coherency between rays in parallel projection. The algorithm starts by building a ray-template and determining a special plane ...

    • A Functional Approach to the Visual Simulation of Gaseous Turbulence 

      Sakas, Georgios; Westermann, Rudiger (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper presents a functional method for the visual simulation of 2-D or 3-D turbulent gaseous motion by using time-varying fractals. The used function incorporates results from the"spectral theory of turbulence", thereby ...

    • Stochastic Motion-Motion Under the Influence of Wind 

      Shinya, Mikio; Fournier, Alain (Blackwell Science Ltd and the Eurographics Association, 1992)
      Stochastic approaches are very effective for modelling natural phenomena. This paper presents a motion model based on a stochastic process as well as physics, and proposes motion synthesis techniques for stochastic ...

    • An Open Model for Hypermedia and Its Application to Geographical Information Systems 

      Hall, W.; Simmons, D. (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper describes the design and implementation of a multimedia information management environment that is based on an open model for hypermedia. The model, known as Microcosm, is currently implemented in Microsoft ...