[Insight-users] How to registrate 3d point clouds by a 3D similarity transform?

[邓非 dengfei]

Hi,
My question is on the registrate 2 points cloud .
There are some  examples in the itk package to demostrate Iterative Closest Point (ICP) algorithms,but there is only Euler3DTransform that without any scale between 2 data sets. 
My data sets exist a scale difference,so i need a 3D similarity transform(translate + rotate +scale).But i haven't find such a transform class in itk . How should i do?

Thank you 
Dengfei 
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