基于地图投影的三维脑电地形图绘制

EEG Topology Drawing Based on the Atlas Projection

直接在三维表面上进行脑电地形图的插值绘制具有较高的算法复杂度,在实际应用特别是商用脑电处理软件方面具有一定的局限性。针对该问题,本文利用地图投影理论将三维头表空间投影到二维空间并完成电位插值,最后再将插值电位反投影到三维头表空间,完成三维头表地形图的绘制。由于该方法是在二维空间完成插值,极大地降低了算法的复杂度,提高了算法的效率,具有明显的工程意义。

Electroencephalogram(EEG)interpolation and EEG Topology drown in three-dimension leads to high algorithm complexity.To some extent,there are limitations in practical application,particularly commercial EEG processing software application.Based on the atlas projection,this paper proposes an EEG Topology drown method.With this method,three-dimensional head scalp is projected into two-dimensional plane and interpolating is completed in this plane,which establishes the relationship between two-dimension and three-dimension,then interpolating potential is projected back to head scalp.The method,with which interpolation is completed in two-dimensional plane,reduces the complexity and improves the efficiency of the algorithm and has obvious significance in engineering.