I’m trying to do registration in 2D using only one scale parameter applied to to both axes. I believe this is called isotropic scaling. I’ve been struggling because the scale transform is ansiotropic. I was thinking that perhaps I could use a similarity transform and constrain the translation and rotation terms, but I haven’t found a way to do this.
Does anyone know whether this is possible? I’d prefer to stay within Python SimpleITK but could migrate to something else if needed.