.
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
Author(s): Henry Kang, Seungyong Lee, Charles K. Chui.
Article: IEEE Transactions on Visualization and Computer Graphics, Vol. 15, No. 1, pp. 62--76,
2009.
[BibTeX] [DOI] 
Abstract:
We present a nonphotorealistic rendering technique that automatically delivers a stylized abstraction of a photograph. Our approach is based on shape/color filtering guided by a vector field that describes the flow of salient features in the image. This flow-based filtering significantly improves the abstraction performance in terms of feature enhancement and stylization. Our method is simple, fast, and easy to implement. Experimental results demonstrate the effectiveness of our method in producing stylistic and feature-enhancing illustrations from photographs.
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
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]
Shape-simplifying Image Abstraction
Henry Kang, Seungyong Lee.
Computer Graphics Forum, Vol. 27, No. 7, pp. 1773--1780,
2008. [BibTeX]