mne.bem.fit_sphere_to_headshape(info, dig_kinds='auto', units='m', verbose=None)[source]#

Fit a sphere to the headshape points to determine head center.


The mne.Info object with information about the sensors and methods of measurement.

dig_kindslist of str | str

Kind of digitization points to use in the fitting. These can be any combination of (‘cardinal’, ‘hpi’, ‘eeg’, ‘extra’). Can also be ‘auto’ (default), which will use only the ‘extra’ points if enough (more than 4) are available, and if not, uses ‘extra’ and ‘eeg’ points.


Can be "m" (default) or "mm".

New in v0.12.

verbosebool | str | int | None

Control verbosity of the logging output. If None, use the default verbosity level. See the logging documentation and mne.verbose() for details. Should only be passed as a keyword argument.


Sphere radius.

origin_head: ndarray, shape (3,)

Head center in head coordinates.

origin_device: ndarray, shape (3,)

Head center in device coordinates.


This function excludes any points that are low and frontal (z < 0 and y > 0) to improve the fit.