control rigidity in bspline registration

Hello! In general the cost function of registration optimization could have two part. One for similarity measurement and the other to control rigidity (registration penalty). In itk I just can change similarity metric. Is there any feature in itk to change registration penalty?

Thanks in advance

Hello @mary_na,

What you are referring to is a regularization term (not specific to rigid), which is not available. The similarity metrics implemented in the ITK registration framework only use the image similarity and do not include a term for transformation parameter regularization.

That being said, the standalone Demons family of algorithms does include regularization via smoothing (elastic or viscous).

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