Volume 11 (1992): Recent submissions

Now showing items 21-40 of 61

    • Equidistant Smoothing of Polyhedra with Arbitrary Topologies 

      Ma, Lizhuang; Liang, Youdong; Peng, Qunsheng (Blackwell Science Ltd and the Eurographics Association, 1992)
      Smoothing of polyhedron with arbitrary topology is an important issue in CAGD and CAD/CAM, but so far it is deemed to be difficult to smooth the complex corners of a polyhedron. In this paper, the concept of distance ...

    • Two-manifold cell-decomposition of r-sets. 

      Falcidieno, Bianca; Ratto, Ornella (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper discusses the relationships studied between manifold solids and r-sets by defining an r-set as a decomposition in two-manifold cells. This decomposition is represented as a graph (Two-manifold Cell Decomposition ...

    • A CAD System for Color Design of a Car 

      Oshima, Tetsuya; Yuasa, Shinji; Sakanoshita, Ken-ichi; Ogata, Yoshinori (Blackwell Science Ltd and the Eurographics Association, 1992)
      We have developed a color CAD system which enables a color designer to evaluate and create body colors of a car on a graphic display and put this system into practical use. The system has three features- generating realistic ...

    • A Development Environment for Constructing Graph-Based Editing Tools 

      Chen, M.; Townsend, P.; Wang, C.Y. (Blackwell Science Ltd and the Eurographics Association, 1992)
      Scientists and engineers use numerous kinds of graph notations to model various objects in the real world and their relationships in an abstract pictorial form. However, developing a specific graph editing tool for each ...

    • Realistic Generation and Real Time Animation of Images of the Human Colon 

      Haritsis, Angelo; Gillies, Duncan; Williams, Christopher (Blackwell Science Ltd and the Eurographics Association, 1992)
      A simulator has been built to teach doctors the skill of handling a flexible endoscope for gastrointestinal investigations. Trainees use a dummy endoscope in which the control actions are transduced into voltages and sensed ...

    • The Graphical Translation of English Text into Signed English in the Hand Sign Translator System 

      Holden, E.J.; Roy, G.G. (Blackwell Science Ltd and the Eurographics Association, 1992)
      Signed English is a manual interpretation of English using fingerspelling and signs. A prototype of the Hand Sign Translator (HST) system was developed to graphically translate English into Signed English, using two-handed ...

    • Computing Dynamic Changes to BSP Trees 

      Chrysanthou, Y.; Slater, M. (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper investigates a new method for dynamically changing Binary Space Partition (BSP) trees. A BSP tree representation of a 3D polygonal scene provides an ideal data structure for rapidly performing the hidden surface ...

    • Reference, Synthesis and Constraint Satisfaction* 

      Pineda, Luis A. (Blackwell Science Ltd and the Eurographics Association, 1992)
      In this paper we discuss two kinds of constraint satisfaction problems that arise in the context of geometric modelling, In particular in the modification of 2-D wire-frame diagrams that are subject to an arbitrary number ...

    • Pandora: An Experiment in Distributed Multimedia 

      King, Tony (Blackwell Science Ltd and the Eurographics Association, 1992)
      An experimental workstation is described which supports digital video and audio in a distributed environment, and which presents this functionality to the user through the medium of a video-extended implementation of the ...

    • Composing Hierarchically Structured Images 

      Patterson, John W.; Cockton, Gilbert (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper begins by examining the classical raster-based composition model, establishing its weakness, and developing a new composition algebra based on line drawing. It then examines the role of composition in the ...

    • 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 ...