mne_transform_points

Overview

mne_transform_points transforms 3D points between coordinate frames using a FIFF coordinate transform. It reads a set of points from a text file, applies the specified transform (forward or inverse as needed), and writes the transformed points to an output file.

This is a C++ port of the original MNE-C tool by Matti Hämäläinen.

Usage

mne_transform_points [options]

Options

Option	Description
--trans <name>	FIFF coordinate transform file
--in <name>	Input text file (one point per line: x y z)
--out <name>	Output text file
--from <name>	Source frame name (head, mri, device)
--to <name>	Target frame name (head, mri, device)
--help	Print help
--version	Print version

Example

# Transform points from MRI to head coordinates
mne_transform_points --trans sam-trans.fif --in points_mri.txt \
    --out points_head.txt --from mri --to head

# Transform from head to device coordinates
mne_transform_points --trans sam-trans.fif --in points_head.txt \
    --out points_dev.txt --from head --to device

Input Format

One point per line, with x, y, z coordinates separated by whitespace. Lines starting with # are comments.

# x        y        z
0.065000   0.023000  0.089000
0.072000  -0.015000  0.078000

See Also

• mne_fit_sphere_to_surf — Fit sphere to surface points
• mne_sensor_locations — Export sensor locations to text