A Study of Quantitative Evaluation Method of Emotion using Facial Expression and Electroencephalogram

本研究的第一个目的是提出一种利用面部表情和生理数据来估计人类愉悦情绪强度的方法。面部表情指标为嘴的横向宽度，生理指标为心率和皮肤电导水平。在观看喜剧电影的同时测量这三项指标。电影结束后，被试对娱乐性和愉悦性的评价分为0、1、2、3四个强度水平。利用这三个指标，推导出基于多元回归模型的估算公式。估计的强度与报告的强度进行了比较。估计的平均误差约为0.3。结论是，所提出的方法能够估计人类的乐趣和快乐的情绪强度。本研究的第二个目的是用1/f^m波动、a波功率和功率流三个指标来评价舒适和不舒适时脑电α波（8Hz ~ 13 Hz）的差异。受试者为16名成年人（20 - 23岁）。在国际10/20脑电系统中，电极接Fpl、Fp、O_1、O_2。在1/f^m波动分析中，Fpl电极的F_<p1>、F_<p2>、O_1、O_2在舒适情绪时的m均值大于不舒适情绪时的m均值。这一结果与前人的研究结果一致。在X波功率分析中，四个电极的舒适和不舒适情绪之间无显著性差异。用自回归模型计算了从一个电极到另外三个电极的功率流。实验结果表明，在F_1、F_2、O_1、O_2上，不舒适情绪下的功率流均值大于舒适情绪<p1><p2>下的功率流均值。

The first purpose of this study is to propose the estimating method of the intensity of human emotion for fun and pleasure using facial expression and physiological data. The index of facial expression is the transverse width of mouth and the indices of physiological data are heart rate and skin conductance level. The three indices were measured while subjects wore seeing comedy movies. The subjects roported their evaluation for fun and pleasure with four intensity levels(0, 1, 2 and 3) after movie. Using the throe indices, the estimation formula based on multiple regression model was derived. The estimated intensity was compared with reported one. The mean error of estimation was about 0.3, It was concluded that the proposed methocl would be able to estimate the intensity of human emotion for fun and pleasure. The second purpose of this study Is to evaluate the differonce of α wave(8Hz 〜 13Hz) of electroenceph ilogram(EEG) on comfortable and uncomfortable emotron usmg three mdices - 1/f^m fluctuations, power of awave and power flow. The subjects were sixteen adults(20〜23 years old). The electrodes were attachedto Fpl Fp O_l 0_2 in the international l0/20 EEG system On 1/f^m fluctuations analysis ofFpl electrode F_<p1>, F_<p2>, O_1, O_2 mean value of m in the comfortable emotion was larger than uncomfortable one. This result was the same one as the precedrng research. On (xwave power 'analysis, there were no significant difference between comfortable and uncomfortable emotion in each four electrodes. Power f'low from one eleotrode to other three electrodos was calculated by autoregressive model. Experimental results showed that mean value of power flow in the uncomfortable emotion was larger th, an comfortable one on F_<p1>, F_<p2>, O_1, O_2.