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Affine transformations

Revision

• coordinate systems and affine transforms.
• Rotations and rotation matrices;

Background

See [BJO02];

• the MNI templates;

• review of spatial processing:

  • slice time correction;
  • motion correction;
  • coregistration of structural to functional;
  • coregistration of structural to template;
  • resampling of functional, stuctural to template;
  • smoothing.

• Matching structural to functional with mutual information.

• The nibabel.affines module;

• Resampling with scipy.ndimage;

• Extra transform exercise;

• Random numbers with np.random;

• Encoding zooms (scaling) with a diagonal matrix.

Exercises

• Affine optimization exercise.