[Insight-users] Slice Registration: Landmark based rigid transform

[Karthik Krishnan]

Kevin:

You are probably looking for a landmark transform in ITK. There are a few based on TPS
http://www.itk.org/Insight/Doxygen/html/classitk_1_1ThinPlateSplineKernelTransform.html
http://www.itk.org/Insight/Doxygen/html/classitk_1_1ThinPlateR2LogRSplineKernelTransform.html
http://www.itk.org/Insight/Doxygen/html/classitk_1_1ElasticBodyReciprocalSplineKernelTransform.html
http://www.itk.org/Insight/Doxygen/html/classitk_1_1ElasticBodySplineKernelTransform.html
http://www.itk.org/Insight/Doxygen/html/classitk_1_1VolumeSplineKernelTransform.html


Unfortunately it looks like there isn't a rigid landmark based method of initializaing registration. It would be nice to have a LandmarkBasedTransformInitializer just like
the CenteredTransformInitializer class. If you need one, let me know and I can add one to ITK. (for rigid and affine transforms). If you would like to do that, it would be perfect. Let me know. 

For reference see VTK:  Hybrid/vtkLandmarkTransform. 
It takes any number of landmarks (1 to n) and finds the appropriate rigid/affine transform that aligns the two images in a least squares sense. 

Thanks
regards
karthik



Kevin H. Hobbs wrote:

>I just decided that I have too much jitter between scans of physical
>slices of my sample.  So I plan on adding registration pins. The only
>way I see to reassemble the slices with ITK is to register each slice
>with the first slice based only on the pins, crop or translate them all,
>and then load the volume.  Seems like a lot of trouble to me.
>
>Since I think this is a common task in microscopy I'm betting there's a
>well worked out way to do this without too much fuss.
>  
>
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