[Insight-users] Optimzers and metrics for point set to point set registration

[Harry Hoellig]

Hi everyone,

I've got two questions and it would be great if someone could help...

1.) I want to perform a point set to point set registration with the 
VersorRigid3DTransform but the associated optimizer 
VersorRigid3DTransformOptimizer uses a SingleValuedCostFunction as 
metric while PointSetToPointSetMetric is a MultipleValuedCostFunction. 
Among the SingleValuedCostFunctions there seems to be no metric which I 
could use for a point set to point set registration. So, is there a way 
to solve this problem in ITK or do I have to implement an own metric to 
convert the PointSetToPointSetMetric into a SingleValuedCostFunction?

2.) I also want to perform the registration with a similarity and an 
affine transformation but I can't find any optimizers to use with these 
transformations. I tried the LevenbergMarquardtOptimizer but it seems to 
destroy the transformation matrix. So, which optimizers can I use?

Thanks in advance
Harry