【作者】 侯文文； 邹俊忠； 刘未来；

【Author】 Hou Wenwen,Zou Junzhong,Liu Weilai(East china university of science and technology,Shanghai,200237)

【机构】 华东理工大学信息科学与工程学院；

【摘要】 基于希尔伯特-黄变换的多分辨分析的特性,提出了一种使用阈值思想去除眼电伪差的新方法。该方法首先对脑电信号进行经验模态分解,去除瞬时频率小于3.5Hz的固有模态函数,然后根据分解后固有模态函数的特性确定阈值,对含有眼电伪差的特定成分进行阈值处理,对阈值处理后的固有模态函数重构,实现眼电伪差的去除。试验结果证明了本文方法的有效性。更多还原

【Abstract】 A threshold method of ocular artifacts removal was proposed,which is based on the characteristics of multi-resolution analysis of HHT and a threshold value determined by the.First,the EEG signal is decomposed into intrinsic mode functions.Then the intrinsic mode function is removed,which instantaneous frequency below 3.5Hz.The threshold is determined by the statistical characteristics of intrinsic mode function,and the value of intrinsic mode function is set by threshold function if it is greater than the threshold.Computing the sum of all intrinsic mode functions,we can obtain corrected EEG.Experimental results show that this method is effective.更多还原