Real-time Rendering of Massive Unstructured Raw Point Clouds using Screen-space Operators
Ruggero Pintus, Enrico Gobbetti, and Marco Agus
October 2011
Abstract
Nowadays, 3D acquisition devices allow us to capture the geometry of huge Cultural Heritage (CH) sites, historical buildings and urban environments. We present a scalable real-time method to render this kind of models without requiring lengthy preprocessing. The method does not make any assumptions about sampling density or availability of normal vectors for the points. On a frame-by-frame basis, our GPU accelerated renderer computes point cloud visibility, fills and filters the sparse depth map to generate a continuous surface representation of the point cloud, and provides a screen-space shading term to effectively convey shape features. The technique is applicable to all rendering pipelines capable of projecting points to the frame buffer. To deal with extremely massive models, we integrate it within a multi-resolution out-of-core real-time rendering framework with small pre-computation times. Its effectiveness is demonstrated on a series of massive unstructured real-world Cultural Heritage datasets. The small precomputation times and the low memory requirements make the method suitable for quick onsite visualizations during scan campaigns.
Reference and download information
Ruggero Pintus, Enrico Gobbetti, and Marco Agus. Real-time Rendering of Massive Unstructured Raw Point Clouds using Screen-space Operators. In The 12th International Symposium on Virtual Reality, Archaeology and Cultural Heritage. Pages 105-112, October 2011.
@InProceedings{Pintus:2011:RRM, author = {Ruggero Pintus and Enrico Gobbetti and Marco Agus}, title = {Real-time Rendering of Massive Unstructured Raw Point Clouds using Screen-space Operators}, booktitle = {The 12th International Symposium on Virtual Reality, Archaeology and Cultural Heritage}, pages = {105-112}, month = {October}, year = {2011}, abstract = { Nowadays, 3D acquisition devices allow us to capture the geometry of huge Cultural Heritage (CH) sites, historical buildings and urban environments. We present a scalable real-time method to render this kind of models without requiring lengthy preprocessing. The method does not make any assumptions about sampling density or availability of normal vectors for the points. On a frame-by-frame basis, our GPU accelerated renderer computes point cloud visibility, fills and filters the sparse depth map to generate a continuous surface representation of the point cloud, and provides a screen-space shading term to effectively convey shape features. The technique is applicable to all rendering pipelines capable of projecting points to the frame buffer. To deal with extremely massive models, we integrate it within a multi-resolution out-of-core real-time rendering framework with small pre-computation times. Its effectiveness is demonstrated on a series of massive unstructured real-world Cultural Heritage datasets. The small precomputation times and the low memory requirements make the method suitable for quick onsite visualizations during scan campaigns. }, url = {http://vic.crs4.it/vic/cgi-bin/bib-page.cgi?id='Pintus:2011:RRM'}, }
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