[Insight-users] Why it takes 45 minutes to do rigid 3D registration

[Junyi Xia]

Hi, folks:
    I am trying to do 3D rigid image registration using mutual 
information, Powell's optimization, euler3D transform and 
multi-resolution method on Brainweb data: brainweb1e1a10f20.mha(fixed 
image) and brainweb1e1a10f20Rot10Tx15.mha ( moving image ) . It took 
about 45 mintues to get the registration result. Would you help me speed 
the calculation? Thanks.

The code is at 
http://plaza.ufl.edu/junyixia/ImageRegistrationMultiResolution.cxx
The result is at http://plaza.ufl.edu/junyixia/ImageRegistrationResult.txt

Junyi