[Insight-users] Question related to Demons algorithm and FEM

[Shah Abhishek]

Hi,

I want to register a 3-D image either by using either demons 
algorithm or FEM.I know that this a very generalized question but 
any help/guidance would be great as I have just started using ITK 
one week ago.
Some of my specific questions are as follows:

1)Please post me some of your experiences while working with 
both/either demons algorithm and FEM.

2)Which method would run faster on a 3-D image?

3)Does FEM method work on binary images?

Thanks in advance.

Regards,
Shah Abhishek