Volume 12 (1993): Recent submissions

Now showing items 41-60 of 62

    • An Integrated System for Modeling, Animating and Rendering Hair 

      Daldegan, Agnes; Thalmann, Nadia Magnenat; Kurihara, Tsuneya; Thalmann, Daniel (Blackwell Science Ltd and the Eurographics Association, 1993)
      There are basically four problems to solve in order to produce realistic animated synthetic actors with hair: hair modeling and creation, hair motion, collision detection and hair rendering. This paper describes a complete ...

    • A Declarative Design Method for 3D Scene Sketch Modeling 

      Donikian, Stephane; Hegron, Gerard (Blackwell Science Ltd and the Eurographics Association, 1993)
      In this paper, we present a dynamic model associated with an intelligent CAD system aiming at the modeling of an architectural scene sketch. Our design methodology has been developed to simulate the process of a user who ...

    • Modeling of Skylight and Rendering of Outdoor Scenes 

      Tadamura, Katsumi; Nakamae, Eihachiro; Kaneda, Kazufumi; Baba, Masashi; Yamashita, Hideo and Nishita, Tomoyuki (Blackwell Science Ltd and the Eurographics Association, 1993)
      Photorealistic animated images are extremely effective for pre-evaluating visual impact of city renewal and construction of tall buildings. In order to generate a photorealistic image not only the direct sunlight but also ...

    • 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) ...

    • Introducing blending operations in feature models 

      Laakko, Timo; Mantyla, Martti (Blackwell Science Ltd and the Eurographics Association, 1993)
      We describe the implementation of a blending facility in the context of a feature modelling system where solid and feature-based modelling operations can be utilized in parallel during the design process of a part. The ...

    • Boolean Operations and Spatial Complexity of Face Octrees. 

      Pla-Garcia, Nuria (Blackwell Science Ltd and the Eurographics Association, 1993)
      Most of the existing representation schemes of free form surfaces or objects with free form boundary are not capable to compute efficiently boolean operations and other usual geometric interrogations. Classical octrees, ...

    • Parallel 3D Delaunay Triangulation 

      Cignoni, P.; Montani, C.; Perego, R.; Scopigno, R. (Blackwell Science Ltd and the Eurographics Association, 1993)

    • 3D Computational Morphology 

      Veltkamp, Remco C. (Blackwell Science Ltd and the Eurographics Association, 1993)
      Computational Morphology is the analysis of form by computational means. This discipline typically uses techniques from Computational Geometry and Computer Aided Geometric Design. The present paper is more specifically ...

    • Updating Polygonizations* 

      Abellanas, M.; Garcia, J.; Hernbandez, G.; Hurtado, F.; Serra, O.; Urrutia, J. (Blackwell Science Ltd and the Eurographics Association, 1993)
      In this paper we consider polygonizations that are robust when faced with changes in the vertices that are present or in their position. We analyze the dynamic maintenance of different types of polygonizations (monotone, ...

    • A Dynamic Gesture Language and Graphical Feedback for Interaction in a 3D User Interface 

      Bordegoni, Monica; Hemmje, Matthias (Blackwell Science Ltd and the Eurographics Association, 1993)
      In user interfaces of modern systems, users get the impression of directly interacting with application objects. In 3D based user interfaces, novel input devices, like hand and force input devices, are being introduced. ...

    • A Note on 3D-Clip Optimisation 

      Hubl, Josef (Blackwell Science Ltd and the Eurographics Association, 1993)
      In order to optimize the transformation-clipping-pipeline of PHIGS or GKS-3D it is sometimes necessary to determine whether a plane intersects a perpendicular volume or not. The solution to this problem is not very ...

    • The ARGOSI Classification Scheme for Graphics and Networking Applications 

      Sutcliffe, D.C.; Gallop, J.R.; Maybury, R.; Day, R.A.; Duce?, D.A.; Reynolds?, G.J. (Blackwell Science Ltd and the Eurographics Association, 1993)
      ARGOSI is a project concerned with the relationship between standards for graphics and networking, as rejected in its full title: Applications Related Graphics and OSI Standards Integration. It is a collaborative project ...

    • A Survey of 3D Solid Reconstruction from 2D Projection Line Drawings 

      Wang, Weidong; Grinstein, Georges G. (Blackwell Science Ltd and the Eurographics Association, 1993)
      The reconstruction of a 3D object from its 2D projection(s) and its corresponding problem of 3D object recognition are two of the important research areas in the field of computer vision and artificial intelligence. ...

    • The Potential Equation and Importance in Illumination Computations 

      Pattanaik, S. N.; Mudur, S. P. (Blackwell Science Ltd and the Eurographics Association, 1993)
      An equation adjoint to the luminance equation for describing the global illumination can be formulated using the notion of a surface potential to illuminate the region of interest. This adjoint equation which we shall call ...

    • Pictorial Editing by Shape Matching Techniques 

      Ventura, A. Della; Ongaro, P.; Schettini, R. (Blackwell Science Ltd and the Eurographics Association, 1993)
      A number ofpainting and retouching packages operate much like the artist s traditional canvas andpalette, with electronic toolsfunctioning like their studio counterparts. These programs, while offering an ample set of tools ...

    • A New Approach for the Generation of Circles 

      Hsu, S. Y.; Chow, Louis R.; Liu, H. C. (Blackwell Science Ltd and the Eurographics Association, 1993)
      Two incremental algorithms for drawing circles using short line segments are proposed in this paper. The proposed algorithms can draw manypoints at one time. They use only addition, subtraction, and shift operations except ...

    • PRIP - A Parallel Raster Image Processor 

      Van Campenhout, Jan M.; Lasure, Roeland (Blackwell Science Ltd and the Eurographics Association, 1993)
      Like colour video displays and laser printers, laser photoplotters are raster scan devices. For such devices, the pixel stream representing the image must be generated in real time, and in the (scan line) order required. ...

    • Electronic Kaleidoscopes for the Mind 

      Pickover, Clifford A.; Rudolph, Larry (Blackwell Science Ltd and the Eurographics Association, 1993)
      The goal ofthis article is to present an informal introduction and tutorial on aestheticallypleasing kaleidoscopic images. The article is intended for the non-mathematical reader interested in computer art. Simple generating ...

    • Symmetrical Patterns from Dynamics 

      Chung, K. W.; Chan, H. S. Y. (Blackwell Science Ltd and the Eurographics Association, 1993)
      Automatic generation of symmetrical patterns belonging to all seventeen wallpaper groups is considered from a dynamical system s point of view. A pseudo-code of the algorithm is provided to generate the computer graphics. ...

    • The Generation of Circular Arcs on Hexagonal Grids 

      Yong-Kui, Liu (Blackwell Science Ltd and the Eurographics Association, 1993)
      The best disposition of a discrete set of points on the plane can be reached if the points are on a hexagonal grid. This paper describes two algorithms for circular arc mesh point selection on hexagonal grids. They find ...