.
Coherent Line Drawing
Henry Kang, Seungyong Lee, Charles K. Chui.
5th International Symposium on Non-Photorealistic Animation (NPAR'07),
2007. [BibTeX]
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]
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]
Multi-scale Line Drawings from 3D Meshes
Alex Ni, Kyuman Jeong, Seungyong Lee, Lee Markosian.
Department of Electrical Engineering and Computer Science, University of Michigan, No. CSE-TR-510-05, July,
2005. [BibTeX]
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]
Real-Time Pencil Rendering
Author(s): Hyunjun Lee, Sungtae Kwon, Seungyong Lee.
Proceedings: 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] [DOI] 
Abstract:
This paper presents a real-time technique for rendering 3D meshes in the pencil drawing style. We analyze the characteristics of pencil drawing and incorporate them into the rendering process, which is fully implemented on a GPU. For object contours, we propose a multiple contour drawing technique that imitates trial-and-errors of human in contour drawing. For interior shading, we present a simple approach for mapping oriented textures onto an object surface. To improve the quality of pencil rendering, we generate and map pencil textures that reflect the properties of graphite pencils and paper. We show several rendering examples that demonstrate the high performance of the proposed technique in terms of speed and quality.
Shape-simplifying Image Abstraction
Henry Kang, Seungyong Lee.
Computer Graphics Forum, Vol. 27, No. 7, pp. 1773--1780,
2008. [BibTeX]