[Insight-users] xxxxxSPAMxxxxx How to calculate Correlation Ratio?

[Shui Ling]

Hi,all
  
 Correlation ratio(eta) is different from correlation coefficient. In ITK, there are several approaches to calculate the correlation coeffcient, while no approach can be found about the correlation ratio. who can give me some tips or advices to compute the correlation ratio? Input two images and compute their correlation ratio, this is my purpose.
 who can help me? Thank you!
  
 Regards,
 Shui Ling
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