[Insight-users] Create histogram of the deformation field magnitude

[Luis Ibanez]

Hi Hong,

Sure,
  you can generate this histogram in the following way:

1) pass your deformation filed to the filter:

    GradientToMagnitudeImageFilter:

http://www.itk.org/Insight/Doxygen/html/classitk_1_1GradientToMagnitudeImageFilter.html

2) Take the output Scalar image and pass it to a histogram calculator.

    ScalarImageToHistogramGenerator
http://www.itk.org/Insight/Doxygen/html/classitk_1_1Statistics_1_1ScalarImageToHistogramGenerator.html


    You will find an example on how to compute histograms in the file


       Insight/Examples/Statistics/ImageHistogram2.cxx


    This example is described in the ITK Software Guide


       http://www.itk.org/ItkSoftwareGuide.pdf





Regards,



     Luis



-====================
Xiang, Hong wrote:
> Hello Karthik and Luis, or any users who may have done this before...
> 
> I wish to generate histograms for the magnitudes of the vector displace-
> ments (deformation fields) given outputs of deformable registrations. Is
> there a good way in ITK or paraview to help with this?
> 
> Thanks in advance,
> Hong
>  
> 
> 
> 
> 
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