Non-Photorealistic Computer Graphics Library

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Found 13 item(s) authored by "Ying-Qing Xu" .
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Article 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]

Article Artistic Image Generation by Deviation Mapping
Liu Wenyin, Xin Tong, Ying-Qing Xu, Heung-Yeung Shum, Zhong Hua.
International Journal of Image and Graphics, Vol. 1, No. 4, November, 2001. [BibTeX]

Proceedings Color Sketch Generation
Fang Wen, Qing Luan, Lin Liang, Ying-Qing Xu, Heung-Yeung Shum.
NPAR '06: Proceedings of the 4th international symposium on Non-photorealistic animation and rendering, pp. 47--54, New York, NY, USA, ACM Press, 2006. [BibTeX]

Proceedings Example-based Automatic Portraiture
Hong Chen, Lin Liang, Ying-Qing Xu, Heung-Yeung Shum, Nan-Ning Zheng.
The 5th Asian Conference on Computer Vision (ACCV2002), Melbourne, Australia, 23–25 January, 2002. [BibTeX]

Proceedings Example-Based Caricature Generation with Exaggeration
Lin Liang, Hong Chen, Ying-Qing Xu, Heung-Yeung Shum.
10th Pacific Conference on Computer Graphics and Applications (PG'02), pp. 386, October 09 - 11, 2002. [BibTeX]

Proceedings Example-Based Composite Sketching of Human Portraits
Hong Chen, Ziqiang Liu, Chuck Rose, Ying-Qing Xu, Heung-Yeung Shum, David H. Salesin.
3rd International Symposium on Non-Photorealistic Animation and Rendering (NPAR'04), 2004. [BibTeX]

Proceedings Example-based Facial Sketch Generation with Non-parametric Sampling
Hong Chen, Ying-Qing Xu, Heung-Yeung Shum, Song-Chun Zhu, Nan-Ning Zheng.
International Conference on Computer Vision 2001 (ICCV'2001), pp. 433--438, 2001. [BibTeX]

Misc Free-form Video Tooning Deformation

Author(s): Jue Wang, Ying-Qing Xu, Michael F. Cohen.
Misc: Poster on SCA2004, 2004.
[BibTeX] Find this paper on Google

Creating a stylized or cartoon video requires a great amount of artistic skill and a considerable amount of time. On the other hand, capturing a video of a live scene is as easy as pointing a video camera at it. Unfortunately, transforming such a natural video to a cartoon-like style is also a challenging problem. In a predecessor paper, Video Tooning to appear at SIGGRAPH this year, we show how to segment a video into temporally coherent segments. These segments are then interactively joined together into spatio-temporal semantic regions (see Figure 1). The regions are sliced in time and rendered to create a Toon style of the original video (Figures 2 and Toon, top row). Although the Video Tooning approach provides a simple means to create stylized videos, the results always directly mimic the motion in the original video. An artist may want to add exaggeration or squash and stretch effects not seen in the original video. In this abstract we demonstrate that the spatio-temporal semantic regions can be treated much like other 3D geometric shapes and subjected to freeform deformation (FFD) methods. FFD has been shown to be a very simple way to alter the overall shape of complex 3D objects by manipulating only a small number of control points that warp the space in which the object resides. We extend the FFD methodology to operate on a hierarchical collection of spatio-temporal regions. The deformation framework is also extended to respect constraints such as foot positions in a walking sequence. Once the spatio-temporal regions have been deformed, we slice them as in the previous work to render the exaggerated cartoon. We show a few results of the use of the system in Figures 3 and 2, and the accompanying video.

Proceedings 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]

Proceedings Simulating Artistic Brushstrokes Using Interval Splines
Sara L. Su, Ying-Qing Xu, Heung-Yeung Shum, Falai Chen.
Proceedings of CGIM 2002, Kauai, HI, August, 2002. [BibTeX]

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