A method for obtaining 3-dimensional facial expressions and its standardization for use in neurocognitive studies
A method for obtaining 3-dimensional facial expressions and its standardization for use in neurocognitive studies
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DOI：
10.1016/s0165-0270(02)00006-7
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发表时间：
2002-04-15
影响因子：
3
通讯作者：
Gur, RE
中科院分区：
文献类型：
--
作者：
Gur, RC;Sara, R;Gur, RE
在神经科学中，情绪的面部表情越来越多地被用作功能成像的探针，并被用作研究面部和情绪处理的大脑半球特化的刺激。可用的面部刺激是二维的，因此，它们的方向是固定的，不适合检查不对称性，它们通常是在糟糕的特定条件下获得的。通常摆姿势，缺乏种族多样性，年龄范围有限。我们描述了一种准确地获取和重建人脸的几何形状并以3维格式显示该重建的方法。我们将这种方法应用于70名演员和69名女演员的样本，他们表达了快乐、悲伤、愤怒、恐惧和厌恶，以及中性的表情，每种情绪都在三种强度水平下以及在姿势和唤起条件下表达。由此产生的图像具有很高的技术质量，并由评分员准确识别。这些刺激物可以以数字形式下载，比如电影，可以控制角度和方位，以包括在功能成像探头或测试中，这些测试可以作为面部情绪处理中个体差异的衡量标准。情绪表达数据库也可以作为与临床人群进行比较的标准。(C)2002年，爱思唯尔科学公司出版。
Facial expressions of emotion are increasingly being used in neuroscience as probes for functional imaging and as stimuli for studying hemispheric specialization for face and emotion processing. Available facial stimuli are 2-dimensional and therefore, their orientation is fixed and poorly suited for examining asymmetries, they are often obtained under poorly specified conditions. usually posed, lack ethnic diversity, and are of restricted age range. We describe a method for accurately acquiring and reconstructing the geometry of the human face and for display of this reconstruction in a 3-dimensional format. We applied the method in a sample of 70 actors and 69 actresses expressing happiness, sadness, anger, fear and disgust, as well as neutral expressions, Each emotion was expressed under three levels of intensity and under both posed and evoked conditions. Resulting images are of high technical quality and are accurately identified by raters. The stimuli can be downloaded in digital form as 'movies' where angle and orientation can be manipulated for inclusion in functional imaging probes or in tests that can be administered as measures of individual differences in facial emotion processing. The database of emotional expressions can also be used as a standard for comparison with clinical populations. (C) 2002 Published by Elsevier Science B.V.