Non-Photorealistic Computer Graphics Library

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Found 12 item(s) authored by "Heung-Yeung Shum" .
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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

Author(s): Fang Wen, Qing Luan, Lin Liang, Ying-Qing Xu, Heung-Yeung Shum.
Proceedings: 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] [DOI] Find this paper on Google

Abstract:
In this paper, we introduce an NPR system to generate color sketches in a free-hand drawing style. From observation, we found out that in a free-hand style both shape and color of image regions are stylized, which contributes cooperatively to the visual effect of a sketch. With the color regions obtained by our interactive segmentation algorithm, we create a stylized color sketch in two steps. First, in order to manifest the lighting and shading of each region, we shrink the boundary of the color regions with a luminance-based algorithm emphasizing the highlight parts, which enforces consistency with the free-hand artist style of the sketch. Second, the proposed color shift algorithm is applied to image regions to emphasize the main content of the sketch and acquires a visually pleasing combination of color. We choose the optimal combination by minimizing the energy function based on an artist drawn color database, artistic drawing rules and input image colors. The generated results show that our system can produce aesthetically pleasing sketches.

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]

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]

Proceedings 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]

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