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Character Animation from a Motion Capture Database


de Aguiar,  Edilson
Computer Graphics, MPI for Informatics, Max Planck Society;
International Max Planck Research School, MPI for Informatics, Max Planck Society;

Theobalt,  Christian
Computer Graphics, MPI for Informatics, Max Planck Society;

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de Aguiar, E. (2003). Character Animation from a Motion Capture Database. Master Thesis, Universität des Saarlandes, Saarbrücken.

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This thesis discusses methods that use information contained in a motion capture database to assist in the creation of a realistic character animation. Starting with an animation sketch, where only a small number of keyframes for some degrees of freedom are set, the motion capture data is used to improve the initial motion quality. First, the multiresolution filtering technique is presented and it is shown how this method can be used as a building block for character animation. Then, the hierarchical fragment method is introduced, which uses signal processing techniques, the skeleton hierarchy information and a simple matching algorithm applied to data fragments to synthesize missing degrees of freedom in a character animation, from a motion capture database. In a third technique, a principal component model is fitted to the motion capture database and it is demonstrated that using the motion principle components a character animation can be edited and enhanced after it has been created. After comparing these methods, a hybrid approach combining the individual technique s advantages is proposed, which uses a pipeline in order to create the character animation in a simple and intuitive way. Finally, the methods and results are reviewed and approaches for future improvements are mentioned.