An Optimized Channel Selection Method Based on Multifrequency CSP-Rank for Motor Imagery-Based BCI System

Figure 3

Overall accuracy curves showing the accuracy behavior with the varying numbers of channel in dataset 1 (a) and dataset 2 (b). The numbers of channels is the stopping criterion of the CSP-rank algorithm. The overall accuracy curves are the average over all subjects in each dataset. The red and blue lines denote the mean validation accuracy curves of two methods, respectively.

(a)

(b)