[Insight-users] Multi Resolution Registration

[laia sales]

Hi All,

I am quite new in ITK and I am trying to use the Multi-Resolution
registration from ITK to register my images.

I am currently using CT images from femur bones of aproximately 250x250x500
with different resolutions of around 0.6x0.6x0.1 mm.

The Optimizer, i am using is the itkVersorRigid3DTransformOptimizer and the
metric itkMeanSquaresImageToImageMetric.

I was firstly implementing the rigid registration with the code provided
with the 3D registration, and it resulted pretty slow. Therefore, I wanted
to try with the pyramidal registration to speed up the registration, but it
is not giving a faster process, but slowing down. I don't get well the
parameters SetMaximumStepLength and SetMinimumStepLength. How these
parameters can reduce the number of iterations for each level and achieve a
faster and optimal registration.

Does anybody use that kind of registration before and can give me some hints
abut it?

Regards,
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