脑电(EEG)是在头表对大脑的神经电生理活动的一种记录。脑电数据的显示有平面脑地形图、立体真实头表显示等多种方式。本文给出了一种基于地图投影理论的二维显示方法:等角方位投影。仿真结果表明,该方法简单方便.且不丢失任何信息,在头表的仟何位置均无变形,所需空间与一般二维显示相同,同时与真实头表显示一样,包含了三维的数据信息,因此是脑电数据显示的一种新途径,方便脑电数据分析。
Electroencephalogram (EEG) is a scalp record of the neural electric activities of the brain. There are many kinds of methods to display the EEG data, such as a projective plane or the realistic head surface. In this work, one of the atlas projection methods, azimuth conformal projection, was tested and recommended as a new way of a planar EEG display. The method details are given and numerically compared with the normal projective plane display. The results indicate that the azimuth projection has many advantages: the transform is simple, convenient, and it can keep all the information. It includes 3-D data without shape change, and just need the same space as the projective plane. Therefore, it can help to analyze the data effectually.