Re: [ITK-users] Segfault after SliceBySliceImageFilter

You haven't created the MinimumImageFilter:

typename MinimumImageFilterType::Pointer MinimumImageFilter =
MinimumImageFilterType::New()



On Fri, Aug 4, 2017 at 8:48 AM, Jonas Teuwen <[email protected]> wrote:

> Hi all,
>
> I wish to apply a filter slice by slice, for which I use
> SliceBySliceImageFilter (after the appropriate definitions):
>
> """
>   typedef itk::LaplacianSharpeningImageFilter <ImageType3D,
> FloatImageType3D> LaplacianSharpeningImageFilterType;
>   LaplacianSharpeningImageFilterType::Pointer
> LaplacianSharpeningImageFilter = LaplacianSharpeningImageFilter
> Type::New();
>   LaplacianSharpeningImageFilter->SetInput(reader->GetOutput());
>   LaplacianSharpeningImageFilter->Update();
>
>   typedef itk::FlatStructuringElement<2> StructuringElementType;
>   StructuringElementType::RadiusType AnnulusRadius;
>   AnnulusRadius.Fill(10);
>   StructuringElementType StructuringElement = StructuringElementType::Annulus(AnnulusRadius,
> Thickness, false, false);
>
>   typedef itk::SliceBySliceImageFilter<FloatImageType3D,
> FloatImageType3D> SliceFilterType;
>   SliceFilterType::Pointer SliceFilter = SliceFilterType::New();
>
>   typedef itk::GrayscaleDilateImageFilter<SliceFilterType::
> InternalInputImageType,
>                                           SliceFilterType::InternalOutputImageType,
> StructuringElementType> GrayscaleDilateImageFilterType;
>   GrayscaleDilateImageFilterType::Pointer GrayscaleDilateImageFilter =
> GrayscaleDilateImageFilterType::New();
>   GrayscaleDilateImageFilter->SetKernel(StructuringElement);
>
>   SliceFilter->SetInput(LaplacianSharpeningImageFilter->GetOutput());
>   SliceFilter->SetFilter(GrayscaleDilateImageFilter);
> """
> If I write the output of SliceFilter to a file, I get what I expact, but I
> do want to compute the minimum between the result and the sharpened image:
>
>   typedef itk::MinimumImageFilter<FloatImageType3D, FloatImageType3D,
> FloatImageType3D> MinimumImageFilterType;
>   typename MinimumImageFilterType::Pointer MinimumImageFilter;
>   MinimumImageFilter->SetInput(0, SliceFilter->GetOutput());
>   MinimumImageFilter->SetInput(1, LaplacianSharpeningImageFilter
> ->GetOutput());
>
> But that immediately segfaults, even before the output is written to disk.
> Whichever order, gdb tells me the program crashes at any ->SetInput in the
> MinimumImageFilter.
> If I on the other hand input a 2D image, and I do not use the
> SliceBySliceImageFilter, the program seems to work as expected.
>
> Are there any debugging steps which I could try to find the flaw?
>
> Best,
> Jonas
>
>
>
>
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