[Insight-users] Problem about CenteredAffineTransform

[Siwei Yang]

Hello every body,
here I have a question about CenteredAffineTransform.
When I was registering two images using  CenteredAffineTransform,  I 
found, that I got the same transform parameters at all times, in spite 
of using different Spacing. For Exampe:
 1.  .............fiximage->SetSpacing (2,3,4) and 
movingimage->SetSpacing(2,3,4); .............
 2.  .............fiximage->SetSpacing (1,1,1) and 
movingimage->SetSpacing(1,1,1);.............
Both cases produced the same transform parameter.
I think, that it should be  not true in mathematical sense.

Furthermore, Using registration ->GetFixedImage()->GetSpacing() I got 
the correct spacing information. It means, that I did pass the right 
spacing into the registration Pipeline.

Can anybody explain it ?


Thanks
Siwei