Doing registration stage
 xf_in->m_type = 0, xf_out->m_type = 0
RESAMPLE 0 1: (3 3 1), (3 3 1)
if we change the implementation to impl=itk we get a different error:
Starting ITK registration
Exception caught in itk registration.
Description: itk::ERROR: RecursiveGaussianImageFilter(00000229A40181F0): The number of pixels along direction 2 is less than 4. This filter requires a minimum of four pixels along the dimension to be processed.
Do you experience or an idea how to circumvent that?
We also tried changing the metric to metric=mi. This ran through, but all values were 0, even if the images were very different, so this didn't seem to have worked either.