.
PicToon: A Personalized Image-based Cartoon System
Hong Chen, Lin Liang, Yan Li, Ying-Qing Xu, Heung-Yeung Shum.
Proceedings of the tenth ACM international conference on Multimedia (MULTIMEDIA '02), pp. 171--178, December,
2002. [BibTeX]
Speech-Driven Cartoon Animation with Emotions
Yan Li, Feng Yu, Ying-Qing Xu, Eric Chang, Heung-Yeung Shum.
ACM Multimedia, pp. 365--371, Ottawa, Canada, Sep-Oct,
2001. [BibTeX]
Stylizing Motion with Drawings
Author(s): Yan Li, Michael Gleicher, Ying-Qing Xu, Heung-Yeung Shum.
Proceedings: Proceedings of 2003 Symposium on Computer Animation, July,
2003.
[BibTeX] 
Abstract:
In this paper, we provide a method that injects the expressive shape deformations common in traditional 2D animation into an otherwise rigid 3D motion captured animation. We allow a traditional animator to modify frames in the rendered animation by redrawing the key features such as silhouette curves. These changes are then integrated into the animation. To perform this integration, we divide the changes into those that can be made by altering the skeletal animation, and those that must be made by altering the character's mesh geometry. To propagate mesh changes into other frames, we introduce a new image warping technique that takes into account the character’s 3D structure. The resulting technique provides a system where an animator can inject stylization
into 3D animation.