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利用面部表情和生理数据来估计人类对乐趣和愉悦的情感强度的方法。面部表情指标为口宽，生理指标为心率和皮肤电导水平。这三项指标是在受试者观看喜剧电影时测量的。受试者报告了他们在看完电影后对乐趣和快乐的四个强度等级（0、1、2和3）的评估。利用这三个指标，推导了基于多元回归模型的估计公式。将估计的强度与报道的强度进行比较。估计的平均误差约为0.3，表明所提出的方法能够估计人类对娱乐和愉悦的情感强度。本研究的第二个目的是利用1/f^m波动、波功率和功率流三种指标，评价舒适和不舒适表情时脑电图α波（8Hz ~ 13Hz）的差异。研究对象为16名年龄在20 ~ 23岁的成年人。在1/f^m波动分析上，ofFpl电极F_<p1>, F_<p2>, O_1， O_2在舒适情绪下m的平均值大于不舒适情绪。这个结果和之前的研究结果是一样的。在x波功率分析中，舒适情绪和不舒服情绪在四个电极上没有显著差异。用自回归模型计算了从一个电极到其他三个电极的功率。实验结果表明，不适情绪下的能量流均值大于0，舒适情绪下的能量流均值大于0，F_<p1>, F_<p2>, O_1, O_2。

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.