利用電腦繪圖繪製動畫是相當重要的運用，不論是在動畫的影片製作上或是及時互動系統的運用中，都隨著圖學技術的進步而越顯的重要。然而，在現今的圖學架構下，無法達到一些以往動畫家在手繪的動畫畫格中所表現出的動畫效果，而必須透過大量人工介入的方
式加以調整處理。
　　在本文中，我們提供使用者由原本的動畫片段中加入殘像、速度線、風格化變形等效果。並且所有的過程在即時下，不用改變原本的動畫資訊和模型資訊下來完成，使用者並且可以透過系統中手繪的介面在即時下互動。
　　在實作方面，大部分的相關圖學計算都交由繪圖處理單元的硬體加速處理，如此可以獲得更高的效率和彈性，適合運用在即時處理的環境中。

　In this paper, we present a system that gives artists the ability to add ghost effect, speedline and stylized deformation to existing animation sequences in real time, withoutthe need to modify the 3D mesh geometry of the animation sequence. The artist can add and control eects using a sketch-based interface, and see the stylized result in real time. With all eects and processing o2 oaded to programmable graphics hardware, the proposed system can be implemented with more e±ciency and °exibility.

[1] N. E. Jones, D. H. House, J. Chen, and J. Keyser, Real-time geometric motion blur for a deforming polygonal mesh," Master's thesis, Texas A&M University, 2004.

[2] C. Shimizu, A. Shesh, and B. Chen, Hardware accelerated motion blur generation," EUROGRAPHICS 2003, vol. 22, no. 3, 2003.

[3] J. P. Collomosse, D. Rowntree, and P. M. Hall, Video analysis for cartoon-like special eects," in 14th British Machine Vision Conference, Sept. 2003, pp.749{758. [Online]. Available: citeseer.ist.psu.edu/collomosse03video.html

[4] J. Davis, M. Agrawala, E. Chuang, Z. Popovic, and D. Salesin, A sketching interface for articulated ¯gure animation," in SCA '03: Proceedings of the 2003
ACM SIGGRAPH/Eurographics symposium on Computer animation. Aire-la-Ville, Switzerland, Switzerland: Eurographics Association, 2003, pp. 320{328.

[5] M. Thorne, D. Burke, and M. van de Panne, Motion doodles: an interface for sketching character motion," ACM Transactions on Graphics, vol. 23, no. 3, pp. 424{431, 2004.

[6] Y. Li, M. Gleicher, Y.-Q. Xu, and H.-Y. Shum, Stylizing motion with drawings," in SCA '03: Proceedings of the 2003 ACM SIGGRAPH/Eurographics symposium on Computer animation. Aire-la-Ville, Switzerland, Switzerland: Eurographics Association, 2003, pp. 309{319.

[7] P. Rademacher, View-dependent geometry," in SIGGRAPH '99: Proceedings of the 26th annual conference on Computer graphics and interactive techniques. New York, NY, USA: ACM Press/Addison-Wesley Publishing Co., 1999, pp. 439{446.

[8] P. Chaudhuri, P. Kalra, and S. Banerjee, A System for View-Dependent Animation," Computer Graphics Forum, vol. 23, no. 3, pp. 411{420, 2004. [Online]. Available: http://www.eg.org/EG/CGF/volume23/issue3/v23i3pp411-420.pdf

[9] S. Chenney, M. Pingel, R. Iverson, and M. Szymanski, Simulating cartoon style animation," in NPAR '02: Proceedings of the 2nd international symposium on Non-photorealistic animation and rendering. New York, NY, USA: ACM Press, 2002, pp. 133{138.

[10] R. D. Kalnins, L. Markosian, B. J. Meier, M. A. Kowalski, J. C. Lee, P. L. Davidson, M. Webb, J. F. Hughes, and A. Finkelstein, WYSIWYG NPR: drawing strokes directly on 3d models," in SIGGRAPH '02: Proceedings of the 29th an-
nual conference on Computer graphics and interactive techniques. New York, NY, USA: ACM Press, 2002, pp. 755{762.

[11] M.-T. Chi and T.-Y. Lee, Stylized and abstract painterly rendering system using a multi-scale segmented sphere hierarchy," IEEE Transaction on Visualization and Computer Graphics, to appear.

[12] J. P. Collomosse and P. M. Hall, Cubist style rendering from photographs," IEEE Transactions on Visualization and Computer Graphics, vol. 9, no. 4, pp. 443{453, 2003.

[13] A. Lake, C. Marshall, M. Harris, and M. Blackstein, Stylized rendering techniques for scalable real-time 3d animation," in NPAR '00: Proceedings of the 1st 44 international symposium on Non-photorealistic animation and rendering. New York, NY, USA: ACM Press, 2000, pp. 13{20.

[14] R. Williams, The Animator's Survival Kit: A Manual of Methods, Principles, and Formulas for Classical, Computer, Games, Stop Motion, and Internet Animators. Faber & Faber, January 2002.

[15] M. Corporation, DirectX 9.0c documentation, One Microsoft Way Redmond, WA 98052-6399, 2005.

[16] D. Ruprecht and H. Muller, Image warping with scattered data interpolation," IEEE Computer Graphics and Applications, vol. 15, no. 2, pp. 37{43, 1995.

[17] F. Luna, Skinned mesh character animation with direct3d 9.0c," September 2004.

[18] S. P. Nee and R. S. Kalawsky, Leveraging the power of the programmable graphics pipeline for atomistic visualisations," Department Computer Science, Loughborough University, Loughborough, United Kingdom, Tech. Rep., 2004.

[19] GPU Gems. nVidia Corporation.

[20] GPU Gems 2. nVidia Corporation.

[21] nVidia Corporation, Nvidia gpu programming guide," 2005.