基于脑电和功能磁共振的3D电视视疲劳评估方法研究

发布时间：2018-04-18 14:05

本文选题：3D电视疲劳 + 主观评测　；参考：《南京航空航天大学》2014年硕士论文

【摘要】：近年来，全球掀起了享受3D视觉盛宴的狂潮，3D电视已走进消费者的日常生活，观看3D电视引起的视疲劳、头昏、恶心等不良症状也引起了人们的重视。本文利用脑电和功能磁共振成像技术研究了观看3D电视与脑功能区变化之间的关系。主要工作如下： 1、分析脑电信号α、β、θ、δ四种特征波能量值及(α+θ)/β、α/β、(α+θ)/(α+β)、θ/β四种比值，结合主观评价结果，建立了基于β波能量和(α+θ)/β、α/β、(α+θ)/(α+β)、θ/β四个比值的评估模型对观看3D电视引起的视疲劳进行客观评价。 2、为了优化基于能量特征值的视疲劳评估模型，引入功率谱熵和重心频率，建立了基于功率谱熵和重心频率的视疲劳评估模型，该模型准确率较高。 3、通过对实验过程中的脑电数据进行分析，发现了观看3D影视过程中大脑状态由清醒到逐渐疲劳到中度疲劳的过程，前20分钟为清醒阶段，20~45分钟视疲劳逐渐增强，，40~45分钟疲劳最严重，达到中度疲劳，部分被试出现重度疲劳。 4、基于功能磁共振的3D影像视疲劳检测。通过观看3D/2D影视前后的棋盘格刺激实验对比分析，发现观看3D影像后，大脑的激活区域以及激活体素具有显著性差异，主要表现在BA8、BA17、BA18及B19区域，其中BA8（额叶眼动区，FEF）表现最为突出，这与基于脑电信号对观看3D电视引起的视疲劳得出的区域相一致。上述研究表明，长时间观看3D电视会造成视疲劳，从而带来健康隐患。从观看3D电视过程中脑电监测的结果来看，建议观看3D电视的时间不宜过长，最好不要超过40分钟。本文研究结果可以为建立健康3D标准提供客观依据。
[Abstract]:In recent years, the world enjoy the visual feast of 3D frenzy, 3D TV has entered the daily lives of consumers, watching 3D TV caused visual fatigue, dizziness, nausea and other symptoms also attracted attention. Magnetic resonance imaging studies the relationship between changes in 3D and watch TV brain EEG and function the main work is as follows:
1, analysis of EEG alpha, beta theta, Delta, four kinds of characteristic wave energy value and (alpha + beta / alpha, theta) / (alpha + beta and theta) / (alpha + beta, beta theta) / four ratio, combined with the subjective evaluation results, establish the beta wave energy and based on (alpha + beta theta / alpha / beta), (+ alpha, theta) / (alpha + beta, beta theta) / four ratio evaluation model to evaluate objectively the visual fatigue caused by watching 3D TV.
2, in order to optimize the visual fatigue assessment model based on the energy eigenvalue, a visual fatigue assessment model based on the power spectral entropy and the center of gravity frequency is established by introducing the power spectral entropy and the gravity frequency. The accuracy of the model is relatively high.
3, through analyzing the EEG data in the experiment analysis, found the brain state in the process of watching 3D television to gradually clear to moderate fatigue fatigue, 20 minutes before the conscious stage, 20~45 minutes of visual fatigue gradually increased, the most serious fatigue in 40~45 minutes, reached the degree of fatigue, some of the subjects had severe fatigue.
4, 3D imaging of functional magnetic resonance imaging and visual fatigue detection based on 3D/2D. By watching the checkerboard film analysis before and after experimental stimulation, found that watching 3D images after the activation of brain regions and activated voxels with significant differences, mainly in BA8, BA17, BA18 and B19 area, including BA8 (frontal eye field. FEF) was the most prominent, and the EEG signal based on visual fatigue caused by watching 3D TV that area is consistent.
The research shows that the long time watching 3D TV will cause visual fatigue, so as to bring health risks. From watching 3D TV during EEG monitor results, suggest that watching 3D TV time should not be too long, preferably not more than 40 minutes. The results of this study can provide objective basis for the establishment of health 3D standards.

【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R445.2

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