.
A Unified Scheme for Adaptive Stroke-based Rendering
Hyung Woo Kang, Charles K. Chui, Uday K. Chakraborty.
The Visual Computer: International Journal of Computer Graphics, Vol. 22, No. 9, pp. 814--824,
2006. [BibTeX]
Coherent Line Drawing
Author(s): Henry Kang, Seungyong Lee, Charles K. Chui.
Proceedings: 5th International Symposium on Non-Photorealistic Animation (NPAR'07),
2007.
[BibTeX] 
Abstract:
This paper presents a non-photorealistic rendering technique that automatically generates a line drawing from a photograph. We aim at extracting a set of coherent, smooth, and stylistic lines that effectively capture and convey important shapes in the image. We ?rst develop a novel method for constructing a smooth direction ?eld that preserves the ?ow of the salient image features. We then introduce the notion of ?ow-guided anisotropic ?ltering for detecting highly coherent lines while suppressing noise. Our method is simple and easy to implement. A variety of experimental results are presented to show the effectiveness of our method in producing self-contained, high-quality line illustrations.
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]
Interactive Sketch Generation
Hyung Woo Kang, Wenjie He, Charles K. Chui, Uday K. Chakraborty.
13th Pacific Conference on Computer Graphics and Applications (PG'05),
2005. [BibTeX]