[ITK] [ITK-users] Difference between displacement field transform and parametric transform

[stefano serviddio]

hi,
I need your help because  I feel confused about the difference between
displacement field transform and parametric transform. I don't
understand the basic difference there is using deformablefieldTransform and
another parametric transformation, like BSpline Transform or Affine
Transform. I think but I'm not sure that using parametric transform reduce
the space of solution of my cost function, such as demons metric or mutua
information one
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