Figure 5.

Artifact correction computation times per method and extend of used functions for the two artifact-correction procedures, measured on a laptop running Matlab 2016a, Intel^®i7 (quadcore) processor and 16GB RAM. The median is shown by the line which divides the boxes, outliers are indicated by crosses outside the whiskers. The core functions contained the Riemannian adaptation and therefore show the biggest difference in computation time. When computation time for all preprocessing functions was measured, the difference was less pronounced since these functions include unchanged computations.