Browsing Issue 3 by Title

Now showing items 5-24 of 44

    • Chebyshev Polynomials for Boxing and Intersections of Parametric Curves and Surfaces 

      Fournier, Alain; Buchanan, John (Blackwell Science Ltd and the Eurographics Association, 1994)
      Parametric curves and surfaces are powerful and popular modelling tools in Computer Graphics and Computer Aided Design. Ray-tracing is a versatile and popular rendering technique. There is therefore a strong incentive in ...

    • COMPUTER GRAPHICS AND REMOTE SENSING - A SYNTHESIS FOR ENVIRONMENTAL PLANNING AND CIVIL ENGINEERING 

      Graf, K.Ch.; Suter, M.; Hagger, J.; Nuesch, D. (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper presents efforts undertaken in the field of photo-realistic visualization of natural landscapes using digital elevation models (DEM) and images generated by remote sensing techniques. The remote sensing systems ...

    • Computer Graphics System for Reproducing Three- Dimensional Shape from Idea Sketch 

      Akeo, Makoto; Hashimoto, Hiroshi; Kobayashi, Taisuke; Shibusawa, Tetsuo (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper describes the technical features and method of implementation of our designer support system which enables reproducing a three-dimensional shape from an idea sketch speedily and modifying the reproduced shape ...

    • Cross Scan Buffer and its Applications 

      Tanaka, Toshimitsu; Takahashi, Tokiichiro (Blackwell Science Ltd and the Eurographics Association, 1994)
      We propose the Cross Scanline Buffer which preserves the result of hidden surface removal as performed by the Cross Scanline Algorithm. The Cross Scan Buffer reduces image re-generation time and eliminates aliasing artifacts ...

    • Designing and Implementing a Grid-Distortion Mapping Based on Variational Principles 

      Arad, Nur (Blackwell Science Ltd and the Eurographics Association, 1994)
      A grid-distortion mapping based on variational principles is described. The mapping is first defined between any two equivalent regular grids with minor geometric restrictions, and is then optimally extended to the interior ...

    • Efficient self-collision detection on smoothly discretized surface animations using geometrical shape regularity 

      VOLINO, Pascal; THALMANN, Nadia Magnenat (Blackwell Science Ltd and the Eurographics Association, 1994)
      We present a new algorithm for detecting self-collisionson highly discretized moving polygonal surfaces. If is based on geometrical shape regularity properties that permit avoiding many useless collision tests. We use an ...

    • Fast Dynamic Tessellation of Trimmed NURBS Surfaced1 

      Abi-Ezzi, Salim S.; Subramaniam, Srikanth (Blackwell Science Ltd and the Eurographics Association, 1994)
      Trimmed NURBS (non-uniform rational B-splines) surfaces are being increasingly used and standardized in geometric modeling applications. Fast graphical processing of trimmed NURBS at interactive speeds is absolutely essential ...

    • Fast Wavelet Radiosity Method 

      Pattanaik, Sumanta N.; Bouatouch, Kadi (Blackwell Science Ltd and the Eurographics Association, 1994)
      Wavelet analysis has been found [1] to be very useful for functional representation and accurate global solution of radiosity. In radiosity we deal with functions in 2D and 4D spaces. Under such conditions, the biggest ...

    • A Formal Approach to the Specification of Graphic Object Functions 

      Torres, J.C.; Clares, B. (Blackwell Science Ltd and the Eurographics Association, 1994)
      Graphic objects are an abstract mathematical model for graphic systems. The model is an algebraic approach to represent graphic information, which include modelling operations. This formalism require some method to describe ...

    • GKS-9x: The Design Output Primitive, an Approach to a Specification. 

      Nehlig, Ph. W.; Duce, D. A. (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper describes an approach to the formal definition of the design primitive introduced in the revision of the ISO/IEC computer graphics standard, GKS. The paper starts with a general description of the design primitive ...

    • A Hand Control and Automatic Grasping System for Synthetic Actors 

      Sanso, Ramon Mas; Thalmann, Daniel (Blackwell Science Ltd and the Eurographics Association, 1994)
      In the computer animation field, the interest for grasping has appeared with the development of synthetic actors. Based on a grasp taxonomy, we propose a completely automatic grasping system for synthetic actors. In ...

    • How to Render Frames and Influence People 

      Strothotte, Thomas; Preim, Bernhard; Raab, Andreas; Schumann, Jutta; Forsey, David R. (Blackwell Science Ltd and the Eurographics Association, 1994)
      Rendering systems generally treat the production of images as an objective process governed by the laws of physics. However, perception and understanding on the part of viewers are subjective processes influenced by a ...

    • Implementing RenderMan - Practice, Problems and Enhancements 

      Slusallek, Philipp; Pflaum, Thomas; Seidel, Hans-Peter (Blackwell Science Ltd and the Eurographics Association, 1994)
      The RenderMan interface has been proposed as a general interface to rendering systems, yet only a few implementations of the interface exist. In this paper we describe the implementation of the RenderMan interface on a ...

    • Improved Visualisation of Marine Data: Algae and Acid Rain 

      Day, A.M.; Turner, S.M.; Arnold, D.B. (Blackwell Science Ltd and the Eurographics Association, 1994)

    • An Inexpensive BRDF Model for Physically-based Rendering 

      Schlick, Christophe (Blackwell Science Ltd and the Eurographics Association, 1994)
      A new BRDF model is presented which can be viewed as an kind of intermediary model between empirism and theory. Main results of physics are observed (energy conservation, reciprocity rule, microfacet theory) and numerous ...

    • An Integrated Line Tracking and Vectorization Algorithm 

      van Nieuwenhuizen, Peter R.; Kiewiet, Olaf; Bronsvoort, Willem F. (Blackwell Science Ltd and the Eurographics Association, 1994)
      A method is presented to compute a vector representation of an arbitrary line in a bi-level raster image The line may have varying line width and irregular borders. Furthermore, at line crossings and branches the user is ...

    • Magicsphere: an insight tool for 3D data visualization 

      Cignoni, P.; Montani, C.; Scopigno, R. (Blackwell Science Ltd and the Eurographics Association, 1994)
      How to render very complex datasets, and yet maintain interactive response times, is a hot topic in computer graphics. The MagicSphere idea originated as a solution to this problem, but its potential goes much further than ...

    • A Median Cut Algorithm for Efficient Sampling of Radiosity Functions 

      Feda, Martin; Purgathofer, Werner (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper presents an efficient method for sampling the illumination functions in higher order radiosity algorithms. In such algorithms, the illumination function is not assumed to be constant across each patch, but it ...

    • The Mesh Propagation Algorithm for Isosurface Construction 

      Howic, C.T.; Blake, E.H. (Blackwell Science Ltd and the Eurographics Association, 1994)
      A new algorithm, Mesh Propagation, is presented for the generation of isosurfaces from three-dimensional discrete data sets. While producing the same surface mesh as that generated by a corrected Marching Cubes algorithm, ...

    • A Method for Displaying Metaballs by using Bezier Clipping 

      Nishita, Tomoyuki; Nakamae, Eihachiro (Blackwell Science Ltd and the Eurographics Association, 1994)
      For rendering curved surfaces, one of the most popular techniques is metaballs, an implicit model based on isosurfaces of potential fields. This technique is suitable for deformable objects and CSG model.For rendering ...