Are the shift parameters affected by the scale parameter in the Similarity3DTransform

Dear All,

I am using the Similarity3DTransform in SimpleITK. I have a doubt. After I get the transform, the parameters concerning the shift are with the dimensions of the .mhd file or the new ones affected by the scaling of the transform?

Thanks,

Luis Gonçalves

Scaling/rotation/shear are usually applied before translation.

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But, for computation of the number of pixels to shift must I divide the translation parameters by “Dimensions” or “Dimensions*Scaling”?

Probably just “Dimensions”, but it is usually easier to try then to figure it out from the documentation. And you might not be thinking in terms of physical space.