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
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    Abstract

    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

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    		 [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. 
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    		 [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. 

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