[vtkusers] ICP match "score"?

[David Doria]

I'm using vtkIterativeClosestPointTransform. Is there any way to judge the
quality of the match? The only information it seems like you can access is
the number of iterations. You can turn on/off "check mean distance", but can
you actually get the mean distance so that you don't have to compute it
manually after the ICP converges? And is there a way to tell how many points
were used in the final iteration?

Or is there a better filter for doing this kind of point cloud to point
cloud registration?

Thanks,

David
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