在現今動畫軟體發展成熟的時代，建立動畫並不需要太多專業知識，靠著動畫軟體方便的人工介面即可輕易上手。然而現有的二維動畫應用技術在處理動畫檔案時只考慮動畫物件的單面性質，欠缺雙面性質的額外考量。
本篇論文提出了一些針對雙面卡通動畫物件的動畫特效處理技術，旨在希望創造出使用單面物件所無法達成的視覺效果。具體來說，我們會將背面動畫物件拼接在相同形狀正面動畫物件的背後，然後將我們特效技術〈翻轉、摺疊、形變〉交互套用在雙面動畫物件上。
藉由我們簡易的使用者操作介面，一般無製作動畫經驗的初學者也能輕而易舉地控制雙面物件與創造雙面動畫特效。

In today's era of animation software development, establishing animations does not require too much expertise. We can easily get started with the convenient user interface of animation software. However, application of the existing two-dimensional animation techniques in dealing with animation files only considered single-sided nature of the object, thus lacking of the considerations of double-sided natures.
This paper made a number of objects for double-sided animation effects processing techniques that cannot be reached by processing single-sided cartoon images. Specifically, we will attach the back side image to the back of the front side image, and then applying special effects (flipping, folding, and shape deformation) to the double-sided cartoon images.
With our intuitional user interface, beginners without experience of creating animation can easily manipulate double-sided objects and create double-sided animation effects.

[1]. M. Alexa, D. Cohen-or, D. Levin, As-rigid-as-possible shape interpolation, in: Proceedings of ACM SIGGRAPH, ACM Press, New York, NY, USA, 2000, pp. 157–164.
[2]. T. Beier, S. Neely, Feature-based image metamorphosis, in: SIGGRAPH 1992: Proceedings of the 19th Annual Conference on Computer Graphics and Interactive Techniques, ACM Press, New York, NY, USA, pp. 35–42.
[3]. G. Celniker, D. Gossard, Deformable curve and surface finite elements for free-form shape design, In Computer Graphics Proceedings of ACM SIGGRAPH 25 (4) (1991) 257–266.
[4]. ECK, M., DEROSE, T., DUCHAMP, T., HOPPE, H., LOUNSBERY, M., AND STUETZLE, W. 1995. Multiresolution Analysis of Arbitrary Meshes. In Computer Graphics (SIGGRAPH Conf. Proc.). ACM, 173–182.
[5]. FIORE, F. D., SCHAEKEN, P., ELENS, K., AND REETH, F. V., 2001. Automatic In-betweening in Computer Assisted Animation by Exploiting 2.5D Modelling Techniques.
[6]. S.F. Gibson, B. Mirtich, A Survey of Deformable Models in Computer Graphics, Technical Report TR-97-19, Mitsubishi Electric Research Laboratories, 1997.
[7]. IGARASHI T., MOSCOVICH T., HUGHES J. F.: As-rigid-as-possible shape manipulation. ACM Transactions on Computer Graphics (Proceedings of SIGGRAPH 2005) 24, 3 (2005), 1134–1141.
[8]. IGARASHI T., IGARASHI Y.: Implementing as-rigid-as-possible shape manipulation and surface flattening. Journal of Graphics Tools (2009).
[9]. D.L. James, D.K. Pai, ArtDefo accurate real time deformable objects, in: Proceedings of ACM SIGGRAPH, ACM Press, New York, NY, USA, 1999, pp. 65–72.
[10]. J. P. Lewis, M. Cordner, N. Fong, Pose space deformations: a unified approach to shape interpolation and skeleton-driven deformation, in: Proceedings of ACM SIGGRAPH, ACM Press, New York, NY, USA, 2000, pp. 165–172.
[11]. R. MacCracken, I. Kenneth, Joy free-form deformations with lattices of arbitrary topology, in: Proceedings of ACM SIGGRAPH, ACM Press, New York, NY, USA, pp. 181–188.
[12]. RIVERS, A., IGARASHI, T., AND DURAND, F. 2010. 2.5D cartoon models. ACM Transactions on Graphics (Proceedings of SIGGRAPH 2010).
[13]. S. Scott, M. Travis, W. Joe, Image deformation using moving least squares, in: Proceedings of ACM SIGGRAPH, vol. 25 (3), ACM Press, New York, NY, USA, 2006, pp. 533–540.
[14]. T.W. Sederberg, S.R. Parry, Free-form deformation of solid geometric models, in: Proceedings of ACM SIGGRAPH, ACM Press, New York, NY, USA, 1986, pp. 151–160.
[15]. A. Sheffer, V. Kraevoy, Pyramid coordinates for morphing and deformation, in: Proceedings of 3D Data Processing, Visualization, and Transmission, Second International Symposium on (3DPVT2004), pp. 68–75.
[16]. Yanlin Weng, Weiwei Xu, Yanchen Wu, Kun Zhou, Baining Guo, 2D shape deformation using nonlinear least squares optimization The Visual Computer: International Journal of Computer Graphics, vol. 22, Springer Verlag, New York, Inc. Secaucus, NJ, USA, 2006.