Now showing items 1-20 of 24

    • Proximity Graphs for Defining Surfaces over Point Clouds 

      Klein, Jan; Zachmann, Gabriel (The Eurographics Association, 2004)
      We present a new definition of an implicit surface over a noisy point cloud. It can be evaluated very fast, but, unlike other definitions based on the moving least squares approach, it does not suffer from artifacts. In ...
    • The Domain of a Point Set Surface 

      Amenta, Nina; Kil, Yong J. (The Eurographics Association, 2004)
      It is useful to be able to define a two-dimensional point-set surface determined by a point cloud. One popular definition is Levin's MLS surface. This surface is defined on a domain which is a three-dimensional subset of ...
    • On Normals and Projection Operators for Surfaces Defined by Point Sets 

      Alexa, Marc; Adamson, Anders (The Eurographics Association, 2004)
      Levin s MLS projection operator allows defining a surface from a set of points and represents a versatile procedure to generate points on this surface. Practical problems of MLS surfaces are a complicated non-linear ...
    • Bounds on the k-Neighborhood for Locally Uniformly Sampled Surfaces 

      Andersson, Mattias; Giesen, Joachim; Pauly, Mark; Speckmann, Bettina (The Eurographics Association, 2004)
      Given a locally uniform sample set P of a smooth surface S. We derive upper and lower bounds on the number k of nearest neighbors of a sample point p that have to be chosen from P such that this neighborhood contains all ...
    • Layered Point Clouds 

      Gobbetti, Enrico; Marton, Fabio (The Eurographics Association, 2004)
      We present a simple point-based multiresolution structure for interactive visualization of very large point sampled models on consumer graphics platforms. The structure is based on a hierarchy of precomputed object-space ...
    • Points Reloaded: Point-Based Rendering Revisited 

      Sainz, Miguel; Pajarola, Renato; Lario, Roberto (The Eurographics Association, 2004)
      The increasing popularity of points as rendering primitives has led to a variety of different rendering algorithms, and in particular the different implementations compare like apples to oranges. In this paper we revisit ...
    • Shape Segmentation and Matching from Noisy Point Clouds 

      Dey, Tamal K.; Giesen, Joachim; Goswami, Samrat (The Eurographics Association, 2004)
      We present the implementation results of a shape segmentation technique and an associated shape matching method whose input is a point sample from the shape. The sample is allowed to be noisy in the sense that they may ...
    • A Barcode Shape Descriptor for Curve Point Cloud Data 

      Collins, Anne; Zomorodian, Afra; Carlsson, Gunnar; Guibas, Leonidas (The Eurographics Association, 2004)
      In this paper, we present a complete computational pipeline for extracting a compact shape descriptor for curve point cloud data. Our shape descriptor, called a barcode, is based on a blend of techniques from differential ...
    • Topological estimation using witness complexes 

      Silva, Vin de; Carlsson, Gunnar (The Eurographics Association, 2004)
      This paper tackles the problem of computing topological invariants of geometric objects in a robust manner, using only point cloud data sampled from the object. It is now widely recognised that this kind of topological ...
    • Meshing Point Clouds Using Spherical Parameterization 

      Zwicker, M.; Gotsman, C. (The Eurographics Association, 2004)
      We present a simple method for meshing a 3D point cloud to a manifold genus-0 mesh. Our approach is based on recent methods for spherical embedding of planar graphs, where we use instead a k-nearest neighborhood graph of ...
    • Progressive Compression of Point-Sampled Models 

      Waschbüsch, M.; Gross, M.; Eberhard, F.; Lamboray, E.; Würmlin, S. (The Eurographics Association, 2004)
      decomposition of the point set and thus easily allows for progressive decoding. Our method is generic in the sense that it can handle arbitrary point attributes using attribute-specific coding operations. Furthermore, no ...
    • Compression of Point-Based 3D Models by Shape-Adaptive Wavelet Coding of Multi-Height Fields 

      Ochotta, Tilo; Saupe, Dietmar (The Eurographics Association, 2004)
      In order to efficiently archive and transmit large 3D models, lossy and lossless compression methods are needed. We propose a compression scheme for coordinate data of point-based 3D models of surfaces. A point-based model ...
    • Boolean Operations on Surfel-Bounded Solids Using Programmable Graphics Hardware 

      Adams, Bart; Dutré, Philip (The Eurographics Association, 2004)
      In this paper we present an algorithm to compute boolean operations on free-form solids bounded by surfels using programmable graphics hardware. The intersection, union and difference of two or more solids, is calculated ...
    • Interactive Silhouette Rendering for Point-Based Models 

      Xu, Hui; Nguyen, Minh X.; Yuan, Xiaoru; Chen, Baoquan (The Eurographics Association, 2004)
      We present a new method for rendering silhouettes of point-based models. Due to the lack of connectivity information, most existing polygon-based silhouette generation algorithms cannot be applied to point-based models. ...
    • Phong Splatting 

      Botsch, Mario; Spernat, Michael; Kobbelt, Leif (The Eurographics Association, 2004)
      Surface splatting has developed into a valuable alternative to triangle meshes when it comes to rendering of highly detailed massive datasets. However, even highly accurate splat approximations of the given geometry may ...
    • Finite Elements on Point Based Surfaces 

      Clarenz, U.; Rumpf, M.; Telea, A. (The Eurographics Association, 2004)
      framework efficiently and effectively brings well-known PDE-based processing techniques to the field of point-based surfaces. Our method is based on the construction of local tangent planes and a local Delaunay triangulation ...
    • Multi-Resolution Sound Rendering 

      Wand, M.; Straßer, W. (The Eurographics Association, 2004)
      Point-based multi-resolution representations have been used successfully for rendering highly complex three dimensional scenes in real-time. In this paper, we apply this paradigm to sound rendering: A hierarchy of stochastic ...
    • Point-based Surface Rendering with Motion Blur 

      Guan, Xin; Mueller, Klaus (The Eurographics Association, 2004)
      In this paper we show how to extend point-based surface rendering to illustrate object motion. We do this by first extruding the circular points into ellipsoids, which fill the space traced out by the points in motion. ...
    • Real-Time Point Cloud Refinement 

      Guennebaud, G.; Barthe, L.; Paulin, M. (The Eurographics Association, 2004)
      Splatting-based rendering techniques are currently the best choice for efficient high quality rendering of pointbased geometries. However, such techniques are not suitable for large magnification, especially when the object ...
    • Interactive 3D Painting on Point-Sampled Objects 

      Adams, Bart; Wicke, Martin; Dutré, Philip; Gross, Markus; Pauly, Mark; Teschner, Matthias (The Eurographics Association, 2004)
      We present a novel painting system for 3D objects. In order to overcome parameterization problems of existing applications, we propose a unified sample-based approach to represent geometry and appearance of the 3D object ...