.
A Solid Model Based Virtual Hairy Brush
Songhua Xu, Min Tang, Francis Lau, Yunhe Pan.
Computer Graphics Forum, Vol. 21, No. 3, September,
2002. [BibTeX]
Advanced Design for a Realistic Virtual Brush
Songhua Xu, Francis Lau, Feng Tang, Yunhe Pan.
Computer Graphics Forum, Vol. 22, No. 3, pp. 533--542, September,
2003. [BibTeX]
Animating Chinese Paintings Through Stroke-Based Decomposition
Songhua Xu, Ying-Qing Xu, Sing Bing Kang, David H. Salesin, Yunhe Pan, Heung-Yeung Shum.
ACM Transactions on Graphics, Vol. 25, No. 2, pp. 239--267,
2006. [BibTeX]
Automatic Generation of Artistic Chinese Calligraphy
Songhua Xu, Francis Lau, William K. Cheung, Yunhe Pan.
IEEE Intelligent Systems, Vol. 20, No. 3, pp. 32--39, May/June,
2005. [BibTeX]
Technical Illustration Based on Human-Like Approach
Weidong Geng, Monika Fleischmann, Hongfeng Yu, Yunhe Pan.
Computer Graphics International (CGI'01), pp. 0343, Hong Kong, China, July 03 - 06,
2001. [BibTeX]
Virtual hairy brush for painterly rendering
Author(s): Songhua Xu, Min Tang, Francis Lau, Yunhe Pan.
Article: Graphical Models, Vol. 66, No. 5, pp. 263--302, September,
2004.
[BibTeX] 
Abstract:
We propose a novel "e-brush" for calligraphy and painting, which meets all the criteria for a good e-brush. We use only four attributes to capture the essential features of the brush, and a suitably powerful modeling metaphor for its behavior. The e-brush's geometry, dynamic motions, and pigment changes are all dealt with in a single model. A single model simplifies the synchronization between the various system modules, thus giving rise to a more stable system, and lower costs. By a careful tradeoff between the complexity of the model and computation efficiency, more elaborate simulation of the e-brush's deformation and its recovery for interactive painterly rendering is made possible. We also propose a novel paperink model to complement the brush's model, and a machine intelligence module to empower the user to easily create beautiful calligraphy and painting. Despite the complexity of the modeling behind the scene, the high-level user interface has a simplistic and friendly design. The final results created by our e-brush can rival the real artwork.