Saving and Loading Paramter files to reapply transfomr

[haidermri]

I would like to save a parameter map file and then load it later to reapply a transform to other move images

I am having figuring out how to do this

Here is how the file to be saved (transfn) is created:
registered_image, params = itk.elastix_registration_method(fixed_image, moving_image,
parameter_object=parameter_object,
log_to_console=False)
parameter_map = params.GetParameterMap(0)
params.WriteParameterFile(parameter_map,transfn)

When I try to load transfn and apply it later using:

        par_obj1 = itk.ParameterObject.New()
        trparams= par_obj1.ReadParameterFile(transfn)
        registered_image = itk.transformix_filter(anothermoveingimage,par_obj1)
        finalmove = itk.GetArrayFromImage(registered_image)

I get the error
File "", line 138, in fCoregwithMask
finalmove = itk.GetArrayFromImage(registered_image)
File "", line 335, in GetArrayFromImage
return _GetArrayFromImage(
File "C:\miniconda3\envs\nnunetv2\lib\site-packages\itk\support\extras.py", line 314, in _GetArrayFromImage
raise RuntimeError("No suitable template parameter can be found.")

registered image has the following shape and type
(264, 289, 86)
<class 'itk.itkPyBufferPython.NDArrayITKBase'>

[thewtex]

Hi,

Are you using the recently released itk-elastix 0.19.0? If not, please upgrade.

What is print(registered_image) and print(type(registered_image))?

[haidermri]

I ma running 0.180
I will update. Thanks

This ended up working without an update
finalmove = np.asarray(registered_image)
instead of
itk.GetArrayFromImage(registered_image)