Video n. 120

Layered Point Clouds

Enrico Gobbetti and Fabio Marton

Presented at the First Eurographics Symposium on Point-Based Graphics, Zurich, Switzerland, June 2-4, 2004.

  • Date: 04/2004
  • Production: CRS4 - D
  • Master: CD120
  • Encoding: DivX
  • thumbnail

    45626 KB


    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 point clouds. At rendering time, the clouds are combined coarse-to-fine with a top-down structure traversal to locally adapt sample densities according to the projected size in the image. Since each cloud is made of a few thousands of samples, the multiresolution extraction cost is amortized over many graphics primitives, and host-to-graphics communication effectively exploits on-board caching and object based rendering APIs. The progressive block based refinement nature of the rendering traversal is well suited to hiding out-of-core data access latency, and lends itself well to incorporate backface, view frustum, and occlusion culling, as well as compression and view-dependent progressive transmission. The resulting system allows rendering of complex models at high frame rates (over 60M splat/second), supports network streaming, and is fundamentally simple to implement.

    Related Publications

    [1] Enrico Gobbetti and Fabio Marton. Layered Point Clouds - a Simple and Efficient Multiresolution Structure for Distributing and Rendering Gigantic Point-Sampled Models. Computers & Graphics, 28(6): 815-826, December 2004. 
    [2] Enrico Gobbetti and Fabio Marton. Layered Point Clouds. In Marc Alexa, Markus Gross, Hanspeter Pfister, and Szymon Rusinkiewicz, editors, Eurographics Symposium on Point Based Graphics. Pages 113-120, 227. Eurographics Association, June 2004. Conference held in Zurich, Switzerland, June 2-5, 2004. 

    Related Videos and Multimedia Productions

    Paolo Cignoni, Fabio Ganovelli, Enrico Gobbetti, Fabio Marton, Federico Ponchio, and Roberto Scopigno
    Efficient Visualization of Large Scale Models on Commodity Graphics Platforms
    CRS4 Video n. 118 - Date: 01/2004 - Duration: 00:07:50