How does VTK Landmark Transform (Rigid/Similarity/Affine) estimate the transformation matrix?

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Lambert Zijp

From the second link, I gather that between the two point sets, it assumes ordered correspondences. So the mapping is not optimized.

In VtkLandmarkTransform.cxx I encountered the use of JacobiN(); an iterative optimization algorithm.

If you know of a method that also optimizes the mapping, without getting stuck in local minima, I'm very interested.

Dennis Robert

Thanks. So I believe it is possible to use some optimisation algorithms. I was thinking VTK will be using some optimisation procedure and hence implementing another optimisation will be useless.

I am planning to use the fiducial registration error minimisation as a method to optimise the transformation and compare the results.