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Layered Point Clouds

Enrico Gobbetti and Fabio Marton

June 2004

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.

Reference and download information

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 multimedia productions

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Enrico Gobbetti and Fabio Marton
Layered Point Clouds
CRS4 Video n. 120 - Date: 04/2004
Presented at the First Eurographics Symposium on Point-Based Graphics, Zurich, Switzerland, June 2-4, 2004.
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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

Bibtex citation record

@InProceedings{Gobbetti:2004:LPC,
    author = {Enrico Gobbetti and Fabio Marton},
    editor = {Marc Alexa and Markus Gross and Hanspeter Pfister and Szymon Rusinkiewicz},
    title = {Layered Point Clouds},
    booktitle = {Eurographics Symposium on Point Based Graphics},
    pages = {113--120, 227},
    publisher = {Eurographics Association},
    address = {Aire-la-Ville, Switzerland},
    month = {June},
    year = {2004},
    isbn = {3-905673-09-6},
    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. },
    note = {Conference held in Zurich, Switzerland, June 2--5, 2004},
    url = {http://vic.crs4.it/vic/cgi-bin/bib-page.cgi?id='Gobbetti:2004:LPC'},
}