[ITK-users] Segmentation fault in itkBinaryMask3DMeshSource

[Francois Budin]

Thank you for checking if we could use the data to add tests. I will try to
generate an image that is large enough to create the same problem.
Replacing the unsigned short with ints is very similar to what I have done
on my local branch (I used long), so I am glad to see that this solution
also works for you.
I'll look into the allocations in the constructor to see if things can be
improved. This might be for a second patch.

Best,
François

On Mon, Aug 14, 2017 at 1:53 AM, Mihail Isakov via Insight-users <
insight-users at itk.org> wrote:

> On Fri, Aug 11, 2017 at 4:44 PM, Francois Budin
> <francois.budin at kitware.com> wrote:
>
> > I found that there was a limitation in the
> > current implementation due to the fact that it uses "unsigned short"
> > variables.
>
> Thank you very much. Fantastic! I changed in itkBinaryMask3DMeshSource.h
>
> unsigned short m_CurrentRowIndex;
> unsigned short m_CurrentFrameIndex;
> unsigned short m_LastRowNum;
> unsigned short m_LastFrameNum;
> unsigned short m_CurrentRowNum;
> unsigned short m_CurrentFrameNum;
>
> to 'int' and it works, no crashes.
>
> BTW, IMHO, it looks like variables m_NodeLimit(2000) and int
> m_CellLimit(4000)
> and allocations in constructor
> this->GetOutput()->GetPoints()->Reserve(m_NodeLimit);
> this->GetOutput()->GetCells()->Reserve(m_CellLimit);
> don't have any effect and can be deleted... I generated huge meshes
> without problems
> very fast (with or without those limits and allocations).
>
> Also i have seen that 3D binary images with dimension 1 cause
> segmentation fault of filter too,
> eg. this one
> https://drive.google.com/file/d/0ByBLJ2-U1t9xS2VCa0RnVVdBYjg/view?usp=
> sharing
> It not relevant to unsigned short issue above.
> Of course such images should not be used at all to generate mesh,
> the same for the first noisy image, but anyway for filter robustness
> some precondition check might be
> done. The filter is very good, very fast.
>
> > Is it ok to add your data you shared in this
>
> I am sorry, i asked the owner of the original data set i derived the
> image from. Unfortunately he don't want to add it permanently to tests
> due to some kind of policy. Sorry
>
>
> Regards,
> Mihail
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