Interactive Facial Expression Editing with Non-linear Blendshape Interpolation

J. Roh, S. Kim, Hanyoung Jang, Yeongho Seol, Jongmin Kim
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Abstract

The ability to manipulate facial animations interactively is vital for enhancing the productivity and quality of character animation. In this paper, we present a novel interactive facial animation editing system that can express the naturalness of non-linear facial movements in real-time. The proposed system is based on a fully automatic algorithm that maintains all positional constraints while deforming the facial mesh as realistic as possible. Our method is based on direct manipulation with non-linear blendshape interpolation. We formulate the facial animation editing as a two-step quadratic minimization and solve it efficiently. From our results, the proposed method produces the desired and realistic facial animation better compared to existing mesh deformation methods, which are mainly based on linear combination and optimization.
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交互式面部表情编辑与非线性Blendshape插值
交互式操作面部动画的能力对于提高角色动画的生产力和质量至关重要。在本文中,我们提出了一种新的交互式面部动画编辑系统,可以实时表达非线性面部运动的自然性。所提出的系统基于一种全自动算法,该算法在尽可能逼真地变形面部网格的同时保持所有位置约束。我们的方法是基于非线性混形插值的直接操作。我们将人脸动画编辑表述为两步二次最小化,并进行了高效求解。结果表明,与现有的基于线性组合和优化的网格变形方法相比,该方法能更好地产生理想的、逼真的面部动画。
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