Standard Montage: easycap-M43 (63 equidistant electrodes)

[dasdiptyajit]

Describe the new feature or enhancement

In our Auditory cognition Lab (Heidelberg, Germany), we use Easycap-M43 eeg cap (63 equidistant electrodes +1 Ref) to record the eeg signals. It's standard layout is currently not available in MNE/FieldTrip software.

Recently, I have received the lookup table for this layout via the manufacture (Easycap) in an excel (.xls) format. I have already converted the original lookup table into a .txt file and created a standard montage out of it. I would like to add (implement) the layout as a standard montage in MNE, so that others can use it in the future.

Describe your proposed implementation

Easycap-M43 standard montage can be read by mne.channels.make_standard_montage('easycap-M43')

Describe possible alternatives

Steps to implement:

1. Add the montage coordinates as a .txtfile.

• easycap-M43.txt file should be added to the path: mne/channels/data/montages/

2. API changes

• Update/add easycap-M43 montage information in _BuiltinStandardMontage class under montage.py, something like this:

code:

    _BuiltinStandardMontage(
        name="easycap-M43",
        description="EasyCap with numbered electrodes (64 locations)",
    )]

• Update/add montage lookup table information in standard_montage_look_up_table API.

code:

standard_montage_look_up_table = {
    "easycap-M43": partial(_easycap, basename="easycap-M43.txt"),
}

I have already implemented and tested the steps in my local mne environment. I am happy to contribute i.e., create a PR for the changes.

Additional context

No response

[sappelhoff]

closed in #11744