Volume 14 (1995): Recent submissions

Now showing items 41-59 of 59

    • Algorithms for Extracting Correct Critical Points and Constructing Topological Graphs from Discrete Geographical Elevation Data 

      Takahashi, Shigeo; Ikeda, Tetsuya; Shinagawa, Yoshihisa; Kunii, Tosiyasu L.; Ueda, Minoru (Blackwell Science Ltd and the Eurographics Association, 1995)
      Researchers in the fields of computer graphics and geographical information systems (GISs) have extensively studied the methods of extracting terrain features such as peaks, pits, passes, ridges, and ravines from discrete ...

    • The MADE Help System 

      Haindl, Michal; de Ruiter, Behr (Blackwell Science Ltd and the Eurographics Association, 1995)
      MADE is the acronym for the ESPRIT project 6307, whose aim is to develop an object oriented multimedia application development environment. As part of this project the MADE help system is designed to be a distributed ...

    • Thoughtful Drawings: A Computational Model of the Cognitive Nature of Children s Drawing 

      Burton, Ed (Blackwell Science Ltd and the Eurographics Association, 1995)
      An interpretation of children s drawing is presented that is based on active perception of the world and the construction of an equivalent self contained two-dimensional world. This model is implemented in a computer program ...

    • Three Architectures for Volume Rendering 

      Hesser, Jurgen; Manner, Reinhard; Knittel, Gunter; Strasser, Wolfgang; Pfister, Hanspeter; Kaufman, Arie (Blackwell Science Ltd and the Eurographics Association, 1995)
      Volume rendering is a key technique in scientific visualization that lends itself to significant exploitable parallelism. The high computational demands of real-time volume rendering and continued technological advances ...

    • An Incremental Alignment Algorithm for Parallel Volume Rendering 

      Or, Daniel Cohen; Fleishman, Shachar (Blackwell Science Ltd and the Eurographics Association, 1995)
      This paper introduces a data distribution scheme and an alignment algorithm for parallel volume rendering. The algorithm performs a single wrap-around shear transformation which requires only a regular inter-processor ...

    • A Multimedia Constraint System1 

      van Hintum, J.E.A.; Reynolds, G.J. (Blackwell Science Ltd and the Eurographics Association, 1995)
      The MADE constraint system provides excellent opportunities to introduce constraints in a multimedia application. Multimedia applications are not only a good place to experiment with constraint systems- constraints in a ...

    • Distributed Augmented Reality for Collaborative Design Applications 

      Ahlers, Klaus H.; Kramer, Andre; Breen, David E.; Chevalier, Pierre-Yves; Crampton, Chris; Rose, Eric; Tuceryan, Mihran; Whitaker, Ross T.; Greer, Douglas (Blackwell Science Ltd and the Eurographics Association, 1995)
      This paper presents a system for constructing collaborative design applications based on distributed augmented reality. Augmented reality interfaces are a natural method for presenting computer-based design by merging ...

    • Optimised CSG Tree Evaluation for Space Subdivision 

      Zemcik, Pavel; Chalmers, Alan (Blackwell Science Ltd and the Eurographics Association, 1995)
      Ray tracing is a well known technique for producing realistic computer images. The computational requirements of this method are such that optimisation techniques, for example space subdivision, must be used if complex ...

    • Fractals and Quasi-Affine Transformations 

      Nehlig, P. W.; Reveilles, J.-P. (Blackwell Science Ltd and the Eurographics Association, 1995)
      In the continuum , contracting affine transformations have a unique fixed point. It is well known that this property is not preserved by dicretization and that the dynamics of discretized functions are very complicated. ...

    • Fast Generation of Leakproof Surfaces from Well-Defined Objects by a Modified Marching Cubes Algorithm 

      Roll, Stefan; Haase, Axel; von Kienlin, Markus (Blackwell Science Ltd and the Eurographics Association, 1995)
      Local surface reconstruction by the Marching Cubes algorithm and its derivatives has a well known ambiguity, which prevents constructed surfaces from being closed and simple. We investigate this ambiguity assuming that a ...

    • Colouration Issues in Computer Generated Facial Animation 

      Patel, M. (Blackwell Science Ltd and the Eurographics Association, 1995)
      In everyday interactions with one another we use the face for recognising people and for communicating with them. Despite the considerable amount of research into computer generated facial animation, one particular aspect, ...

    • Collision Detection for Animation using Sphere-Trees 

      Palmer, I. J.; Grimsdale, R. L. (Blackwell Science Ltd and the Eurographics Association, 1995)
      The detection of collisions between moving polyhedral objects is one of the most computationally intensive tasks in the computer animation process. The use of object-oriented techniques to encapsulate data within the objects ...

    • 3D Interaction with the Desktop Bat 

      Steed, Anthony; Slater, Mel (Blackwell Science Ltd and the Eurographics Association, 1995)
      Many applications now demand interaction with visualizations of 3D scenes and data sets. Current flat 2D displays are limited in their capacity to provide this not only by the display technology but the interaction metaphors ...

    • An Algorithm for Perspective Viewing of Objects Represented by Octrees 

      Aref, Walid G.; Samet, Hanan (Blackwell Science Ltd and the Eurographics Association, 1995)
      A new algorithm is presented for viewing three-dimensional objects, represented by an octree, from an arbitrary location. The algorithm generates aperspective view of the objects while eliminating hidden surfaces. The ...

    • Image Warping Using Few Anchor Points and Radial Functions 

      Arad, Nur; Reisfeld, Daniel (Blackwell Science Ltd and the Eurographics Association, 1995)
      Transformations based on radial basis junctions have proven to be a powerful tool in image warping. In the present work we decompose these transformations into linear and radial terms, and show examples where such a ...

    • Symbolic and Numeric Computation in Curve Interrogation 

      Elber, Gershon (Blackwell Science Ltd and the Eurographics Association, 1995)
      The control of shape of curves is of great importance in computer aided geometric design. Determination of planar curves convexity, the detection of infection points, coincident regions, and self intersection points, the ...

    • Isometric Piecewise Polynomial Curves 

      Fiume, Eugene (Blackwell Science Ltd and the Eurographics Association, 1995)
      The main preoccupations of research in computer-aided geometric design have been on shape-specification techniques for polynomial curves and surfaces, and on the continuity between segments or patches. When modelling with ...

    • Efficient Parallel Gouraud Shading and Linear Interpolation over Triangles 

      Narayanaswami, Chandrasekhar (Blackwell Science Ltd and the Eurographics Association, 1995)
      A parallel raster algorithm to draw Gouraud shaded triangles is presented. At the heart of the algorithm is a new constrained parallel edge-traversal technique. This parallel traversal represents an increased level of ...

    • Line Clipping Using Semi-Homogeneous Coordinates 

      Nielsen, Hans Peter (Blackwell Science Ltd and the Eurographics Association, 1995)
      The dual intersection test is described. It is a new method for deciding whether a line intersects a window. The concept of semi-homogeneous coordinates is introduced. It allows us to define line segments in projective ...