Non-Photorealistic Computer Graphics Library

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Found 3 item(s) authored by "Sven C. Olsen" .

Proceedings Interactive 3D Fluid Jet Painting
Sangwon Lee, Sven C. Olsen, Bruce Gooch.
NPAR '06: Proceedings of the 4th international symposium on Non-photorealistic animation and rendering, pp. 97--104, New York, NY, USA, June, ACM Press, 2006. [BibTeX]

Proceedings Interactive Vector Fields for Painterly Rendering.
Sven C. Olsen, Bruce A. Maxwell, Bruce Gooch.
Graphics Interface (GI'05), pp. 241--247, 2005. [BibTeX]

Article Real-Time Video Abstraction

Author(s): Holger Winnemöller, Sven C. Olsen, Bruce Gooch.
Article: ACM Transactions on Graphics (Proc. of SIGGRAPH'06), Vol. 25, No. 3, pp. 1221--1226, July, 2006.
[BibTeX] [DOI] Find this paper on Google

Abstract:
We present an automatic, real-time video and image abstraction framework that abstracts imagery by modifying the contrast of visually important features, namely luminance and color opponency. We reduce contrast in low-contrast regions using an approximation to anisotropic diffusion, and artificially increase contrast in higher contrast regions with difference-of-Gaussian edges. The abstraction step is extensible and allows for artistic or data-driven control. Abstracted images can optionally be stylized using soft color quantization to create cartoon-like effects with good temporal coherence. Our framework design is highly parallel, allowing for a GPU-based, real-time implementation. We evaluate the effectiveness of our abstraction framework with a user-study and find that participants are faster at naming abstracted faces of known persons compared to photographs. Participants are also better at remembering abstracted images of arbitrary scenes in a memory task.

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