[Insight-users] re: how to check on goodness of registration

[Karthik Krishnan]

Hi Rex,

I am sure if there are numerical metrics other than MSE etc.

For a subjective evaluation you could

1. Overlay the images (after registration and before registration)
       To do that you might want to either

          a. use a itk-vtk pipeline and use vtkImageBlend
                as in      blend->SetInput(0, firstImage);
                             blend->SetInput(1, secondImage);

          b. Implement it in ITK with functors as in:
                  typedef BinaryFunctorImageFilter< InputImageType, 
InputImageType, OutputImageType, BlendFunctor<InputPixelType, 
InputPixelType, OutputPixelType> >   BlenderType;
                  typename BlenderType::Pointer blender = 
BlenderType::New();
                  blender->SetInput1(......);                     
blender->SetInput2(......);
               
                where you will write the BlendFunctor.
                See http://www.vtk.org/Wiki/User_talk:Andy for writing 
functors

2. A checkerboard pattern. There are lots of these in the SW Guide.
       You can use ImageToVTKImageFilter and then use 
vtkImageCheckerboard filter

thanks
kk


You could do an overlay or
mrcheung at mdanderson.org wrote:

>We are using the itk deformable image registration -- Bspline and Mut Inf.
>Once the convergence is achieved, are there itk modules that we could use
>to check to goodness of the registration?
>Thanks, Rex
>
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