Smoothing cannot be zero

[cookpa]

I would like to evaluate some parameter choices against ANTs defaults, which use zero smoothing in some contexts. Using -s 1.732vox 0vox (ANTs default) in registration causes a runtime error:

src/ITK-4.13.2/Modules/Filtering/Smoothing/include/itkRecursiveGaussianImageFilter.hxx:344:
itk::ERROR: RecursiveGaussianImageFilter(0x3e34950): Sigma must be greater than zero.

Similarly, -ri LABEL 0vox fails.

Using a small number is a viable workaround.

[pyushkevich]

Thanks, Phil! I need to put an if statement in the code if sigma is zero.

Paul

On Thu, Aug 15, 2019 at 2:46 PM Philip Cook [email protected] wrote:

I would like to evaluate some parameter choices against ANTs defaults, which use zero smoothing in some contexts. Using -s 1.732vox 0vox (ANTs default) in registration causes a runtime error:

src/ITK-4.13.2/Modules/Filtering/Smoothing/include/itkRecursiveGaussianImageFilter.hxx:344: itk::ERROR: RecursiveGaussianImageFilter(0x3e34950): Sigma must be greater than zero.

Similarly, -ri LABEL 0vox fails.

Using a small number is a viable workaround.

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