[Insight-developers] DiffusionFunctions and ImageSpacing bug

[Bradley Lowekamp]

I just submitted the following bug.

http://www.itk.org/Bug/view.php?id=8888


In itkCurvatureNDAnisotropicDiffusionFunction.txx it appears to  
correctly implement image spacing by utilizing the m_ScaleCoefficients  
for computation of the derivatives.

I was using itkGradientAnisotropicDiffusion on some anisotropic  
spacing imaged so I turned on UseImageSpacing, at which point my next  
to no diffusion occurred. This seems to be the cause. I scaled the  
computation in the appropriate Diffusion function and the results  
appear to be what I expected. I crossed checked with the other  
"DiffusionFunctions" and found only one of the four appeared to be  
implemented correctly.

Bill appears to have made these changes some time ago in just scalar  
Curvature.

http://public.kitware.com/cgi-bin/viewcvs.cgi/Code/BasicFilters/itkCurvatureNDAnisotropicDiffusionFunction.txx?root=Insight&r1=1.11&r2=1.12

Can some one please confirm that this is a bug that should be fix?

Thanks,
Brad

========================================================
Bradley Lowekamp
Lockheed Martin Contractor for
Office of High Performance Computing and Communications
National Library of Medicine
blowekamp at mail.nih.gov


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