Psychophysical evaluation of animated facial expressions
Psychophysical evaluation of animated facial expressions
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动画面部表情的心理物理学评估
DOI：
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发表时间：
2005
期刊：
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通讯作者：
H. Bülthoff
中科院分区：
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作者：
C. Wallraven;M. Breidt;D. Cunningham;H. Bülthoff
人类的脸能够产生惊人的各种各样的表情，有时这些表情的最小差异会显著改变所感知到的意思。制作逼真的面部动画，能够传输这种程度的复杂性仍然是计算机图形学中一个具有挑战性的研究课题。一个需要回答的重要问题是：什么时候面部动画足够好？在这里，我们提出了一个综合框架，在这个框架中，心理物理实验是系统地评估计算机生成的动画相对于现实世界视频序列的感知质量的第一步。第一个实验的结果是对几种动画技术的评估，其中我们暴露了对感知保真度很重要的特定动画参数。在第二个实验中，我们在知觉研究的背景下使用这些基准动画，以便系统地研究表情的时空特征。使用这种综合方法，我们能够为感知和计算机图形学社区提供对面部表情的见解。
The human face is capable of producing an astonishing variety of expressions---expressions for which sometimes the smallest difference changes the perceived meaning noticably. Producing realistic-looking facial animations that are able to transport this degree of complexity continues to be a challenging research topic in computer graphics. One important question that remains to be answered is: When are facial animations good enough? Here we present an integrated framework in which psychophysical experiments are used in a first step to systematically evaluate the perceptual quality of computer-generated animations with respect to real-world video sequences. The result of the first experiment is an evaluation of several animation techniques in which we expose specific animation parameters that are important for perceptual fidelity. In a second experiment we then use these benchmarked animations in the context of perceptual research in order to systematically investigate the spatio-temporal characteristics of expressions. Using such an integrated approach, we are able to provide insights into facial expressions for both the perceptual and computer graphics community.