In the itkSoftwareGuide an examples is walked through using a RigidTransform. But is a RigidTransform not just a centered AffineTransform? I am a bit confused that a RigidTransform exists, as I understand rigid and non-rigid are concepts that includes transforms. Something like:<br>
<br>Rigid:<br> - Translation<br> - Affine<br><br>Non-Rigid<br> - BsplineDeformableTransform<br><br><br>Or are there something unique about a RigidTransform that is not accomplished using eg. translation or Affine transforms?<br>