Hi Brad, I apologize for the delayed response. I’m still catching up on my workload after moving to CA. We might want to talk to Luis as it was my understanding that the “center” component of the linear transforms might be a carry-over from all the “Centered” transforms, e.g.,
http://www.itk.org/Doxygen/html/classitk_1_1CenteredAffineTransform.html which, if I remember correctly, Luis said were somewhat sub optimally conceived but this was such a long time ago that I might be completely misremembering. However, fixing the center for all transforms within a composite transform is certainly not necessary within the specified framework. Rather, the matrix and offset are updated with the “Center” being updated implicitly. Nick On Jul 24, 2014, at 7:27 AM, Bradley Lowekamp <[email protected]> wrote: > Hello, > > There are a lot of transforms involved in the new registration framework. > > I am trying to figure out what the implications for the fix parameters of the > transform "Center" ( ie center of rotation/scaling ) are when combined with > composite transforms and the fixed/moving/registration coordinate frames... > > Based on how the transforms are composed it seems necessary to set the fix > "Center" for subsequent transformations. Additionally, I am unsure how one > would "improve" ( poorly defined? ) the center for a subsequent transform ie > Affine after a similarity... > > Are there some documented guidance or figures to help with this issue? > Do we have a comprehensive diagram of these transforms? > > Thanks, > Brad > _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Kitware offers ITK Training Courses, for more information visit: http://kitware.com/products/protraining.php Please keep messages on-topic and check the ITK FAQ at: http://www.itk.org/Wiki/ITK_FAQ Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/insight-developers
