PointWorks: Abstraction and Rendering of Sparsely Scanned Outdoor Environments
Author(s): Hui Xu, Nathan Gossett, Baoquan Chen.
Proceedings: Rendering Techniques 2004 (Eurographics Symposium on Rendering), ACM Press,
2004.
[BibTeX] 
Abstract:
This paper describes a system, dubbed PointWorks, for rendering three-dimensionally digitized outdoor environments in non-photorealistic rendering styles. The challenge in rendering scanned outdoor environments is accommodating their inaccuracy, incompleteness, and large size to deliver a smooth animation without suggesting the underlying data deficiency. The key method discussed in this paper is employing artistic drawing techniques to illustrate features of varying importance and accuracy. We employ a point-based representation of the scanned environment and operate directly on point-based models for abstraction and rendering. We develop a framework for producing mainly two artistic styles: painterly and profile lines. Strategies have also been employed to leverage modern graphics hardware for achieving interactive rendering of large scenes.