EG1984 Proceedings (Technical Papers): Recent submissions

Now showing items 21-35 of 35

    • IMPROVING COMPUTER GRAPHICS TOOLS FOR ARCHITECTS 

      Ekeberg, Oerjan; Engblom, Carl-Henrik; Kjelldahl, Lars; Lundequist, Jerker; Thörnblom, Ingvar (The Eurographics Association, 1984)
      During the last ten years a lot of work has been done in architectural applications using computers and especially computer graphics. It is however obvious that these new tools have not been fully accepted by architects ...

    • EXPERIENCES WITH NEW IMAGE COMPONENT ALGORITHMS 

      Samet, Hanan; Tamminen, Markku (The Eurographics Association, 1984)
      We present experiences and comparisons evaluating a fast algorithm for connected component labeling of quad- and octrees. The algorithm works without loss of efficiency on linear tree representations that may reside in ...

    • QUADTREE SCAN CONVERSION 

      Oliver, M.A.; King, T.R.; Wiseman, N.E. (The Eurographics Association, 1984)
      An efficient method is described for turning a quadtree encoding of an image into scan lines. When implemented in hardware it becomes possible to generate video in real time for a raster display without the need for a ...

    • USER INTERFACE: CONCEPTS AND SPECIFICATIONS 

      Spliid, Axel Monrad; Sorgen, Amos (The Eurographics Association, 1984)
      A CAD/CAM/CAE system may be very powerful, but its acceptance among a user group depends heavily on its User Interface. It is very important that the User Interface of such a system can easily be adapted to the engineer's ...

    • Three-Dimensional Data Input by Selection of Hierarchically Defined Blocks 

      Yamaguchi, K.; Inamoto, N.; Kunii, H. S.; Kunii, T. L. (The Eurographics Association, 1984)
      This paper discusses inputing three dimensional solid object data by means of a two dimensional tablet. This method involves refining an object by gradually generalizing a class of 'permissible' objects. The design of an ...

    • A PAINT PROGRAM FOR THE GRAPHIC ARTS IN PRINTING 

      Willis, P J (The Eurographics Association, 84)
      There is considerable scope for the application of computer techniques to help the graphic designer working with printed products, provided that pictures of high technical quality result. Described here is the product of ...

    • CADASTRAL MAPPING PILOT PROJECT 

      Sondergaard, Aage (The Eurographics Association, 1984)
      The immense and complicated task of converting a traditional cadastral map production into the most modern computer assisted interactive graphic production technique, and at the same time achieve increased productivity, ...

    • APPLICATION OF COMPUTER-GENERATED ANIMATION IN EUROPEAN SPACE RESEARCH 

      Kristiansen, E. (The Eurographics Association, 84)
      In space research, there is often a need to illustrate motion, such as a spacecraft's orbital motion and attitude manoeuvres. This paper presents various types of applications for computer generated animation in space ...

    • RAY TRACING OBJECTS DEFINED BY SWEEPING A SPHERE 

      Wijk, J.J. van (The Eurographics Association, 1984)
      The basic calculation underlying ray tracing is that of the intersection of a line with the surfaces of an object. A method is presented here for performing this calculation for a new and powerful class of objects, those ...

    • AN ANALYTICAL VISIBILITY METHOD FOR DISPLAYING PARAMETRICALLY DEFINED SURFACES 

      Rehwald, Peter; Hornung, Christoph (The Eurographics Association, 1984)
      This paper describes an analytical method to determine the visible parts of a Cartesian product surface. The bounds of these visible areas are determined in terms of the (u,v)-parameter-plane. This leads to many advantages ...

    • Twixt: A 3D Animation System 

      Gomez, Julian E. (The Eurographics Association, 1984)
      This paper describes a visually interactive 3D computer animation system. Animation is controlled by lists of events stored in tracks. Tracks are interpolated by functions that have an arbitrary degree of knowledge about ...

    • A COMPUTER GRAPHIC APPROACH TO LATERAL SKULL CEPHALOSTAT RADIOGRAPH ANALYSIS FOR ORTHODONTIC DIAGNOSIS AND TREATMENT PLANNING 

      Hubbold, R.J.; Eid, A.A. (The Eurographics Association, 1984)
      Interactive computer graphics programs have been developed to permit the clinical application of a new method of analysis of craniofacial discrepancies and its use for diagnosis and testing alternative treatment plans. The ...

    • A NEW DISPLAY FILE STRUCTURE FOR LINE AND SURFACE PRESENTATIONS 

      Krmer, Thomas; Rix, Joachim (The Eurographics Association, 1984)
      In the design process of 3D objects i t will be helpful to use not only an output pipeline design for a wire frame model on a vector device but also for shaded surface presentations on a raster device. To reduce the total ...

    • CONVENTIONAL ELEMENTS OF ENGINEERING DRAWINGS - FREE FORM CURVES 

      Renner, G. (The Eurographics Association, 1984)
      Technical objects which are typically described by free-form surfaces, usually also contain conventional elements (planes, cylinders, cones). Consequently, methods and systems for defining free-form shapes are advantageously ...

    • COMPUTER-AIDED THREE-DIMENSIONAL RECONSTRUCTION FROM SERIAL SECTIONS: A SOFTWARE PACKAGE FOR RECONSTRUCTION AND SELECTIVE IMAGE GENERATION FOR COMPLEX TOPOLOGIES 

      Huijsmans, D. P.; Lamers, W. H.; Los, J. A.; Smith, J.; Strackee, J. (The Eurographics Association, 1984)
      To extend computer-aided three-dimensional reconstruction of (microscopic) biological structures to complex topologies, a number of specially developed contour algorithms are employed to generate hidden-line displays of ...