Registration Algorithm or Evolution Optimizer Not Deterministic

[dzenanz (Dženan Zukić)]

Take a look at this discussion about registration reproducibility:

Unstable iteration for registration

Hi all, I am using itk.RegularStepGradientDescentOptimizerv4 to perform a multiresolution translation registration between two images. I ran my code in the same computation environment for the same two images at different times, but I got a slightly different results (please see the attached figures) during the iterations. I checked the results and found the difference mostly starting from the middle level of a image pyramid (I used 3-level image pyramid), and then the difference would be incre…