Now showing items 19-38 of 43

    • Handling Degeneracies in Exact Boundary Evaluation 

      Ouchi, K.; Keyser, J. (The Eurographics Association, 2004)
      We present a method for dealing with degenerate situations in an exact boundary evaluation system. We describe the possible degeneracies that can arise and how to detect them. We then present a numeric perturbation method ...
    • History Based Reactive Objects for Immersive CAD 

      Convard, T.; Bourdot, P. (The Eurographics Association, 2004)
      Virtual Environments (VE) allow direct 3D interaction, better perception of shapes and a feel of immersion, properties that are highly desirable for design tasks. Traditional CAD software extensively use WIMP interfaces ...
    • Image Based Bio-CAD Modeling and Its Applications to Biomedical and Tissue Engineering 

      Starly, B.; Darling, A.; Gomez, C.; Nam, J.; Sun, W.; Shokoufandeh, A.; Regli, W. (The Eurographics Association, 2004)
      CAD has been traditionally used to assist in engineering design and modeling for representation, analysis and manufacturing. Advances in Information Technology and in Biomedicine have created new uses for CAD with many ...
    • Implicit Curve and Surface Design Using Smooth Unit Step Functions 

      Li, Q. (The Eurographics Association, 2004)
      This paper presents an implicit curve and surface design technique that uses smooth unit step functions. With the proposed method, an implicit curve or surface can be generated by inputting a sequence of points together ...
    • Integrated Feature-Based and Geometric CAD Data Exchange 

      Spitz, S. N.; Rappoport, A. (The Eurographics Association, 2004)
      Data exchange between CAD systems is an extremely important solid modeling concept, fundamental both for the theory of the field and for its practical applications. The two main data exchange (DE) paradigms are geometric ...
    • Making the Most of Using Depth Reasoning to Label Line Drawings of Engineering Objects 

      Varley, P. A. C.; Martin, R. R.; Suzuki, H. (The Eurographics Association, 2004)
      Automatic creation of B-rep models of engineering objects from freehand sketches would benefit designers. A subgoal is to take a single line drawing (with hidden lines removed), and from it deduce an initial 3D geometric ...
    • Medial Axis Extraction and Shape Manipulation of Solid Objects Using Parabolic PDEs 

      Du, H.; Qin, H. (The Eurographics Association, 2004)
      Shape skeletonization (i.e., medial axis extraction) is powerful in many visual computing applications, such as pattern recognition, object segmentation, registration, and animation. This is because medial axis (or skeleton) ...
    • Medial-Axis Based Solid Representation 

      Shaham, A.; Shamir, A.; Cohen-Or, D. (The Eurographics Association, 2004)
      The medial axis (MA) of an object and medial axis transform (MAT) have many applications in solid modeling, computer graphics and other areas. Exact computation of MA is complex and various medial axis approximation ...
    • Multiresolution Heterogeneous Solid Modeling and Visualization Using Trivariate Simplex Splines 

      Hua, J.; He, Y.; Qin, H. (The Eurographics Association, 2004)
      This paper presents a new and powerful heterogeneous solid modeling paradigm for representing, modeling, and rendering of multi-dimensional, physical attributes across any volumetric objects. The modeled solid can be of ...
    • Optimization Techniques for Approximation with Subdivision Surfaces 

      Marinov, M.; Kobbelt, L. (The Eurographics Association, 2004)
      We present a method for scattered data approximation with subdivision surfaces which actually uses the true representation of the limit surface as a linear combination of smooth basis functions associated with the control ...
    • Physics-based Modelling and Simulation of Functional Cloth for Virtual Prototyping Applications 

      Fontana, M.; Rizzi, C.; Cugini, U. (The Eurographics Association, 2004)
      A CAD-oriented system is proposed for the design of complex-shaped functional cloth, provided with a physics-based modelling core for simulation and virtual prototyping tasks. Textiles are physically modelled as particle ...
    • Planar Parameterization for Closed Manifolds Genus-1 Meshes 

      Steiner, D.; Fischer, A. (The Eurographics Association, 2004)
      Parameterization of 3D meshes is important for many graphics and CAD applications, in particular for texture mapping, re-meshing and morphing. Current parameterization methods for closed manifold genus-n meshes usually ...
    • Plumber: A Multi-scale Decomposition of 3D Shapes into Tubular Primitives and Bodies 

      Mortara, M.; Patane, G.; Spagnuolo, M.; Falcidieno, B.; Rossignac, J. (The Eurographics Association, 2004)
      Plumber is a specialized shape classi cation method for detecting tubular features of 3D objects represented by a triangle mesh. The Plumber algorithm segments a surface into connected components that are either body parts ...
    • Progressive Dimension-Independent Boolean Operations 

      Paoluzzi, A.; Pascucci, V.; Scorzelli, G. (The Eurographics Association, 2004)
      This paper introduces a new progressive multi-resolution approach for representating and processing polyhedral objects of any dimension. Our representation, a variant of BSP trees [Nay90] combined with the Split scheme ...
    • Reconstruction with 3D Geometric Bilateral Filter 

      Miropolsky, A.; Fischer, A. (The Eurographics Association, 2004)
      In recent years, reverse engineering (RE) techniques have been developed for surface reconstruction from 3D scanned data. Typical sampling data, however, usually is large scale and contains unorganized points, thus leading ...
    • Residual Iteration and Accurate Polynomial Evaluation for Shape-interrogation Applications 

      Hoffmann, C.; Park, with G.; Simard, J-R.; Stewart, N. F. (The Eurographics Association, 2004)
      Surface interrogation and intersection depend crucially on good root-finding algorithms, which in turn depend on accurate polynomial evaluation. Conventional algorithms for evaluation typically encounter difficulties near ...
    • Shape Similarity Measurement Using Ray Distances for Mass Customization 

      Hwang, T. J.; Lee, K.; Jeong, J. H.; Oh, H. Y. (The Eurographics Association, 2004)
      Custom-tailored products are defined as products having various sizes and shapes tailored to meet the customer's different tastes or needs. Thus fabrication of custom-tailored products inherently involves inefficiency. To ...
    • Shortest Circuits with Given Homotopy in a Constellation 

      Michelucci, D.; Neveu, M. (The Eurographics Association, 2004)
      Abstract A polynomial method is described for computing the shortest circuit with a prescribed homotopy on a surface. The surface is not described by a mesh but by a constellation: a set of sampling points. Points close ...
    • Spline Approximation of General Volumetric Data 

      Roessl, C.; Zeilfelder, F.; Nuernberger, G.; Seidel, Hans-Peter (The Eurographics Association, 2004)
      We present an efficient algorithm for approximating huge general volumetric data sets, i.e. the data is given over arbitrarily shaped volumes and consists of up to millions of samples. The method is based on cubic trivariate ...
    • Stability and Homotopy of a Subset of the Medial Axis 

      Chazal, F.; Lieutier, A. (The Eurographics Association, 2004)
      Medial Axis is known to be unstable for non smooth objects. The Medial Axis has applications in image analysis and mathematical morphology, Solid Modeling, or domain decomposition for CAD to CAE (i.e. Finite Elements) ...