Now showing items 21-40 of 41

    • Extracting contour lines from a hierarchical surface model 

      De Floriani, Leila; Mirra, Daniela; Puppo, Enrico (Blackwell Science Ltd and the Eurographics Association, 1993)
      The Hierarchical Triangulated Irregular Network (HTIN) is a structure for representing 2?-dimensional surfaces at different levels of detail through piecewise-linear approximations based on triangulations of the surface ...
    • A New Paradigm for Geometric Processing 

      Yamaguchi, Fujio; Niizeki, Masatoshi (Blackwell Science Ltd and the Eurographics Association, 1993)
      A new paradigm for geometric processing is proposed. The paradigm can be featured by the four key phrases: (1) Totally Four Dimensional Homogeneous Processing, (2) 4 ? 4 Matrix Method and 4 ? 4 Determinant Method, (3) ...
    • A 4D Ray Tracing 

      Maurel, Herve; Duthen, Yves; Caubet, Rene (Blackwell Science Ltd and the Eurographics Association, 1993)
      We are going to present a survey of techniques using temporal coherence in between frames to render animation sequences with ray tracing. A new method using temporal coherence in the ray space (lightpath of rays) is proposed. ...
    • An Object Model for Multimedia Programming 

      Arbab, F.; Herman, I.; Reynolds, G.J. (Blackwell Science Ltd and the Eurographics Association, 1993)
      The development of multimedia applications is a complex task. Much of this complexity stems from requirements associated with programming multiple media objects and the control of dependences and inter-relationships between ...
    • Using Multimedia to Support Cooperative Editing 

      Santos, A.; Tritsch, B. (Blackwell Science Ltd and the Eurographics Association, 1993)
      By Cooperative Editing we mean the coordinated manipulation of information by a group of authors. During the editing process the (co-)authors need to communicate their ideas, drafts and constraints (remotely or face-to-face) ...
    • Interactive Neural Network Texture Analysis and Visualization for Surface Reconstruction in Medical Imaging 

      Busch, C.; Gro?, M.H. (Blackwell Science Ltd and the Eurographics Association, 1993)
      The following paper describes a new approach for the automatic segmentation and tissue classification of anatomical objects such as brain tumors from magnetic resonance imaging (MRI) data sets using artificial neural ...
    • Cooperative Visualization of Computational Fluid Dynamics 

      Gerald-Yamasaki, Michael J. (Blackwell Science Ltd and the Eurographics Association, 1993)
      Tempus Fugit/Interview is a computational fluid dynamics visualization application for which processing is distributed between high performance graphics workstations and supercomputers. Facilities are provided in the ...
    • Storage Support for Multidimensional Discrete Data in Multimedia Databases 

      Furtado, Paula; Teixeira, Jose Carlos (Blackwell Science Ltd and the Eurographics Association, 1993)
      Multidimensional discrete data (MDD) is enormously important for multimedia applications since diverse types of such data are used simultaneously by any multimedia application. However, multidimensional discrete data is ...
    • Fast Spheres 

      Patterson, John W. (Blackwell Science Ltd and the Eurographics Association, 1993)
      A new method for generating sphere-like images, using parabolic surfaces delimited by Bresenham s circle- generation algorithm, is presented. In many cases the resultant images are indistinguishable from spheres illuminated ...
    • Automatic Reconstruction of Buildings from Stereoscopic Image Sequences 

      Koch, Reinhard (Blackwell Science Ltd and the Eurographics Association, 1993)
      A vision-based 3-D scene analysis system is described that is capable to model complex real-world scenes like streets and buildings automatically from stereoscopic image pairs. Input to the system is a sequence of stereoscopic ...
    • A New Radiosity Approach Using Area Sampling for Parametric Patches 

      Nishita, Tomoyuki; Nakamae, Eihachiro (Blackwell Science Ltd and the Eurographics Association, 1993)
      A high precision illumination model is indispensable for lighting simulation and realistic image synthesis. For the purpose of improving realism, research on global illumination has been done, and several papers on radiosity ...
    • On the Application of Quantization and Dithering Techniques to History of Arts 

      Coltelli, P.; Faconti, G.; Marfori, F. (Blackwell Science Ltd and the Eurographics Association, 1993)
      The diffusion of computing techniques within humane studies is considerably increasing, due to technological advances and reduction in computing costs, with History of Arts being one of the most interesting fields of ...
    • Pseudo-Satellitefilm Using Fractal Clouds to Enhance Animated Weather Forecasting 

      Sakas, Georgios; Schroder, Florian; Koppert, Hans-Joachim (Blackwell Science Ltd and the Eurographics Association, 1993)
      We have developed a system enabling the National German Meteorological Office to generate pseudo-satellite images and video sequences based on their weather forecasting simulation data. With our system meteorologists can ...
    • Photo-Realistic Imaging of Digital Terrains 

      Cohen, Daniel; Shaked, Amit (Blackwell Science Ltd and the Eurographics Association, 1993)
      We present a method for the generation of photo-realistic images of views over terrain datasets by mapping a digital aerial photograph on a perspective projection of a digital elevation map. We use high resolution for both ...
    • Abstract Interaction Objects 

      Duke, D.J.; Harrison, M.D. (Blackwell Science Ltd and the Eurographics Association, 1993)
      The concept of an interactor has been introduced by Faconti and Paterno [6] as an abstraction of an entity in interactive graphics capable of both input and output. However the notion of interaction object need not be ...
    • Landscapes Synthesis Achieved through Erosion and Deposition Process Simulation 

      Roudier, P.; Peroche, B.; Perrin, M. (Blackwell Science Ltd and the Eurographics Association, 1993)
      This paper describes an original approach to terrain evolution in landscapes synthesis. In order to create some realistic landforms, we simulate geologically contrasted terrains and apply to them deterministic erosion ...
    • DaScript3D Integrating 3D Graphics in a Page Description Language 

      Samara, Veronika (Blackwell Science Ltd and the Eurographics Association, 1993)
      Despite the necessity of producing high-quality documents comprising all aspects of electronic publishing, there is still no system available that can generate and integrate two-dimensional (2D) graphics, three-dimensional ...
    • A Progressive Radiosity Algorithm for Scenes Containing Curved Surfaces 

      Bao, Hujun; Peng, Qunsheng (Blackwell Science Ltd and the Eurographics Association, 1993)
      Based on the theory of light energy transfer between two differential diffuse surface areas, a generalized radiosity approach is presented. Unlike the conventional radiosity method, curved surfaces are subdivided into ...
    • Accurate and Consistent Reconstruction of Illumination Functions Using Structured Sampling 

      Drettakis, George; Fiume, Eugene (Blackwell Science Ltd and the Eurographics Association, 1993)
      The study of common classes of diffuse emitters, such as planar convex polygons, reveals several interesting properties of the functions of illumination these emitters cast on receiver surfaces. Some properties, such as ...
    • The Cone of Normals Technique for Fast Processing of Curved Patches 

      Shirmun, Leon A.; Abi-Ezzi, Salim S. (Blackwell Science Ltd and the Eurographics Association, 1993)
      The cone of normals technique for curved surface patches allows to perform various quick tests at the patch level such as front- or backfacing test, light influence test, and existence of silhouette edges test. For a given ...