I want to preprocess 21 Channels of EEG ( and 3 more channels for EOG) data using MNE. In order to remove EOG artifacts, I use SSP in MNE (Python).
When I increase the number of projectors, the SSP removes EOG artifacts.
But I think besides removing the artifacts I lose some information in raw data.
Based on a tutorial in the MNE toolbox:
How did we choose these numbers (number of projectors)? The short answer is “based on experience”. ([Repairing artifacts with SSP — MNE 1.0.0 documentation]
But I couldn’t find any article regarding this problem, I mean finding the optimum number of projectors.