通过采集志愿者观看不同深度信息的3D影片时的脑电数据,来研究影片的深度信息对观看者疲劳产生的影响.本研究选取了10名健康的男性志愿者,分别观看5部不同深度信息的3D影片片段,记录其观看前后的脑电信号.通过计算观看前后各频带的功率谱,得出疲劳因子R=(Pα+Pθ)/Pβ的比值变化情况.设计了问卷,定性了解志愿者的疲劳程度,并用统计学方法分析了深度信息和对应R值、主观疲劳值两者之间的关系.结果表明,在观看不同深度信息的3D影片后,全部志愿者主观反映眼部出现沉重、酸胀、刺痛等疲劳症状和其他不适,并且有14个导联的R值上升,在导联F4、C4、F7尤其明显.结论是:(1)深度信息与疲劳度有密切的关联性,平均深度信息和标准差越大,也越容易产生疲劳;(2)相同深度信息的交叉视差比非交叉视差更能引起疲劳;(3)疲劳因子R值与主观疲劳问卷可以作为观看3D影片疲劳评估的一个参考指标.
In this work,10 healthy male volunteers were required to watch 5 film clips with different depth information.Their EEG data of pre-and post-watching were collected for figuring out the impact of depth information of 3D films on audiences' visual fatigue.By calculating the power of each frequency band spectrum,the change of fatigue factor R =(Pα + Pθ)/Pβ was obtained.Additionally we designed questionnaires to evaluate the volunteers' degree of visual fatigue qualitatively.The relationship amid depth information,R-value and subjective fatigue feeling emerged from the questionnaire was analyzed statistically.Experimental results showed that after watching 3D films with different depth information,all volunteers reported eyes appearing heavy,soreness,tingling and other symptoms of fatigue or other discomforts.Fatigue factors collected from 14 independent leads increase accordingly,especially in lead F4,C4,F7.Our conclusions are following:(1) A close correlation between depth information and audiences' fatigue exists,the greater the average depth information and its standard deviation,the more prone to tired; (2) The crossed disparity is more prone to cause fatigue than uncrossed disparity at the same depth information.(3) The fatigue factor R-value and subjective fatigue questionnaire can be used as a point of reference for the 3D movie fatigue assessment.