Now showing items 1-20 of 42

    • Head-Tracked Stereo Viewing with Two-Handed 3 D Interaction for Animated Character Construction 

      Turner, Russell; Gobbetti, Enrico; Soboroff, Ian (Blackwell Science Ltd and the Eurographics Association, 1996)
      In this paper, we demonstrate how a new interactive 3 D desktop metaphor based on two-handed 3 D direct manipulation registered with head-tracked stereo viewing can be applied to the task of constructing animated characters. ...
    • Interactive Occlusion and Automatic Object Placement for Augmented Reality 

      Breen, David E.; Whitaker, Ross T.; Rose, Eric; Tuceryan, Mihran (Blackwell Science Ltd and the Eurographics Association, 1996)
      We present several techniques for producing two visual and modeling effects in augmented reality. The first effect involves interactively calculating the occlusions between real and virtual objects. The second effect ...
    • Data Dependent Thin Plate Energy and its use in Interactive Surface Modeling 

      Greiner, Gunther; Loos, Joachim; Wesselink, Wieger (Blackwell Science Ltd and the Eurographics Association, 1996)
      When modeling spline surfaces of complex shape, one has to deal with an overwhelming number of control points. Modeling by direct manipulation of the control points is a tedious task. In particular, it is very difficult ...
    • Three-Dimensional Modeling and Effects on Still Images 

      Zakait, Yaron; Rappoport, Ari (Blackwell Science Ltd and the Eurographics Association, 1996)
      Designers and creative artists use computer graphics and image processing effects on stall photographs in application areas such as advertising entertainment broadcasting and the arts Most of the effects available in ...
    • Generation of Smooth Surfaces by Controlling Curvature Variation 

      Higashi, Masatake; Tsutamori, Hideo; Hosaka, Mamoru (Blackwell Science Ltd and the Eurographics Association, 1996)
      To satisfy a designer s intention for constructing aesthetic shapes such as automotive bodies, we propose a surface generation method. In the surface design process, designers determine shapes according to their great ...
    • Output-SensitiveVisibility Algorithms for Dynamic Scenes with Applications to Virtual Reality 

      Sudarsky, Oded; Gotsman, Craig (Blackwell Science Ltd and the Eurographics Association, 1996)
      An output-sensitive visibility algorithm is one whose runtime is proportional to the number of visible graphic primitives in a scene model-not to the total number of primitives, which can be much greater. The known practical ...
    • Intelligent Control for Haptic Displays 

      Munch, Stefan; Stangenberg, Martin (Blackwell Science Ltd and the Eurographics Association, 1996)
      Usually, a mouse is used for input activities only, whereas output from the computer is sent via the monitor and one or two loudspeakers. But why not use the mouse for output, too? For instance, if it would be possible to ...
    • Radiosity for dynamic scenes in flatland with the visibility complex 

      ORTI, Rachel; RIVIERE, Stephane; DURAND, Fredo; PUECH, Claude (Blackwell Science Ltd and the Eurographics Association, 1996)
      The radiosity method is particularly suitable for global illumination calculations in static environments. Nonetheless, recent applications of image synthesis such as architectural simulation or lighting design require the ...
    • CCD-Camera Based Optical Beacon Tracking for Virtual and Augmented Reality 

      Madritsch, Franz; Gervautz, Michael (Blackwell Science Ltd and the Eurographics Association, 1996)
      We introduce a scheme for optical beacon tracking using two CCD-cameras and LED beacons. Due to the sub-pixel accuracy of the beacon detection algorithm a very high precision can be achieved so that the tracking method is ...
    • Modelling Megalithic Sites 

      POULET, Francois; LUCAS, Michel (Blackwell Science Ltd and the Eurographics Association, 1996)
      In this paper, we present the MegaFormes project which deals with the modelling of megalithic sites. The goal is to enable virtual visits of megalithic sites and to help archaeologists in picturing the evolution of a ...
    • Fractal modeling using free form techniques 

      Zair, Chems Eddine; Tosan, Eric (Blackwell Science Ltd and the Eurographics Association, 1996)
      IFS models have become a powerful tool for the construction of fractal sets. They offer a straightforward way to generate complex, self-similar figures as attractors. However, they present the fundamental disadvantage of ...
    • Compositing Computer and Video Image Sequences: Robust Algorithms for the Reconstruction of the Camera Parameters 

      Berger, M.-O.; Chevrier, C.; Simon, G. (Blackwell Science Ltd and the Eurographics Association, 1996)
      Augmented reality shows great promises in fields where a simulation in situ would be impossible or too expensive. When mixing synthetic and real objects in the same animated sequence, we must be sure that the geometrical ...
    • Surface Graph Sketching 

      Hutchinson, D.; Lin, F.; Hewitt, W.T. (Blackwell Science Ltd and the Eurographics Association, 1996)
      The production of patterns and designs upon surfaces has received only limited attention, with texturing techniques being accepted as adequate. Texturing, however, can be a very unsatisfactory and clumsy method of producing ...
    • Vector Field Based Texture Mapping of Animated Implicit Objects 

      Smets-Solanes, Jean-Paul (Blackwell Science Ltd and the Eurographics Association, 1996)
      This paper shows that an adequate use of vectorfields can solve most inconsistencies related to texture mapping that appear in current animation and rendering systems based on implicit objects. The method used is based on ...
    • Interpolatory Subdivision on Open Quadrilateral Nets with Arbitrary Topology 

      Kobbelt, Leif (Blackwell Science Ltd and the Eurographics Association, 1996)
      A simple interpolatory subdivision scheme for quadrilateral nets with arbitrary topology is presented which generates C1 surfaces in the limit. The scheme satisfies important requirements for practical applications in ...
    • Physically-Based Deformations Constrained in Displacements and Volume 

      Promayon, E.; Baconnier, P.; Puech, C. (Blackwell Science Ltd and the Eurographics Association, 1996)
      This paper presents a method of constraining physically-based deformable objects. In this method, an object can be defined locally in terms of kinetic and dynamic (mass, position, speed), and physical parameters (compressibility, ...
    • Implicit Sweep Objects 

      Crespin, Benoit; Blanc, Carole; Schlick, Christophe (Blackwell Science Ltd and the Eurographics Association, 1996)
    • Mesh Simplification 

      Algorri, Maria-Elena; Schmitt, Francis (Blackwell Science Ltd and the Eurographics Association, 1996)
      Mesh simplification is an important stage after surface reconstruction since the models produced can contain a large number of polygons making them difficult to manipulate. In this paper we present a mesh simplification ...
    • Automatic Generation of Multiresolution Boundary Representations 

      Andujar, C.; Ayala, D.; Brunet, P.; Arinyo, R. Joan; Sole, J. (Blackwell Science Ltd and the Eurographics Association, 1996)
      The paper focuses on automatic simplification algorithms for the generation of a multiresolution family of solid models from an initial boundary representation of a polyhedral solid. An algorithm for general polyhedra based ...
    • Special Effects with Half-Toning 

      Buchanan, John W. (Blackwell Science Ltd and the Eurographics Association, 1996)
      Half-toning is the process by which gray-scale images are approximated with sets of black and white pixels. The process works because our eyes perceive a local average, thus half-toning seeks to approximate the local ...