Non-Photorealistic Computer Graphics Library

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Found 7 item(s) authored by "Seungyong Lee" Find Author on Google.

Proceedings Coherent Line Drawing
Henry Kang, Seungyong Lee, Charles K. Chui.
5th International Symposium on Non-Photorealistic Animation (NPAR'07), 2007. [BibTeX]

Article Detail Control in Line Drawings of 3D Meshes
Kyuman Jeong, Alex Ni, Seungyong Lee, Lee Markosian.
The Visual Computer (Pacific Graphics 2005), Vol. 21, No. 8, pp. 698--706, 2005. [BibTeX]

Article Flow-Based Image Abstraction
Henry Kang, Seungyong Lee, Charles K. Chui.
IEEE Transactions on Visualization and Computer Graphics, Vol. 15, No. 1, pp. 62--76, 2009. [BibTeX]

Technical Report Multi-scale Line Drawings from 3D Meshes

Author(s): Alex Ni, Kyuman Jeong, Seungyong Lee, Lee Markosian.
Technical Report: Department of Electrical Engineering and Computer Science, University of Michigan, No. CSE-TR-510-05, July, 2005.
[BibTeX] Find this paper on Google

Abstract:
We present an effective method for automatically selecting the appropriate scale of shape features that are depicted when rendering a 3D mesh in the style of a line drawing. The method exhibits good temporal coherence when introducing and removing lines as needed under changing viewing conditions, and it is fast because the calculations are carried out entirely on the graphics card. The strategy is to pre-compute a sequence of filtered versions of the mesh that eliminate (via a signal processing technique) shape features at progressively larger scales. Each mesh in the sequence retains the original number of vertices and connectivity, providing a direct correspondence between meshes. The mesh sequence is loaded onto the graphics card, and at run-time a vertex program interpolates positions and curvature values between two of the meshes, depending on distance to the camera. A pixel program then renders silhouettes and suggestive contours to produce the line drawing. In this way, fine shape features are depicted over nearby surfaces, while appropriately coarse-scaled features are depicted over more distant regions.

Proceedings Multi-scale line drawings from 3D meshes
Alex Ni, Kyuman Jeong, Seungyong Lee, Lee Markosian.
SI3D '06: Proceedings of the 2006 symposium on Interactive 3D graphics and games, pp. 133--137, New York, NY, USA, ACM Press, 2006. [BibTeX]

Proceedings Real-Time Pencil Rendering
Hyunjun Lee, Sungtae Kwon, Seungyong Lee.
NPAR '06: Proceedings of the 4th international symposium on Non-photorealistic animation and rendering, pp. 37--45, New York, NY, USA, ACM Press, 2006. [BibTeX]

Article Shape-simplifying Image Abstraction
Henry Kang, Seungyong Lee.
Computer Graphics Forum, Vol. 27, No. 7, pp. 1773--1780, 2008. [BibTeX]

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