[ITK] [ITK-users] Can I alter the way SliceBySliceImageFilter defines the origin of the internal slices?
Matt McCormick
matt.mccormick at kitware.com
Fri Sep 8 15:08:52 EDT 2017
Yes, that is an issue -- good catch!
If we change:
internalOutputRegion.SetIndex( internal_i, requestedIndex[i] );
to:
internalOutputRegion.SetIndex( internal_i, 0 );
and
internalInputRegion.SetIndex( internal_i,
this->GetInput(0)->GetRequestedRegion().GetIndex(i) );
to:
internalInputRegion.SetIndex( internal_i,
0 );
is the behavior corrected?
Thanks,
Matt
On Fri, Sep 8, 2017 at 11:13 AM, hellman <fredrik.hellman at gmail.com> wrote:
> I am not sure. In SliceBySliceImageFilter.hxx for ITK 4.12.0, on line 188, it
> says:
>
> // copy the requested region to the internal slice region in
> // dimension order
> unsigned int internal_i = 0;
> for ( unsigned int i = 0; internal_i < InternalImageDimension; ++i,
> ++internal_i )
> {
> if ( i == this->m_Dimension )
> {
> ++i;
> }
> internalOutputRegion.SetSize( internal_i, requestedSize[i] );
> internalOutputRegion.SetIndex( internal_i, requestedIndex[i] );
>
> internalInputRegion.SetSize( internal_i,
> this->GetInput(0)->GetRequestedRegion().GetSize(i) );
> internalInputRegion.SetIndex( internal_i,
> this->GetInput(0)->GetRequestedRegion().GetIndex(i) );
>
> }
>
> This will copy all indices (except the slicing dimension) of input 0 to
> internalInputRegion, which is set as the regions for the internal image
> further down. In my case, the 5s get copied here.
>
> I have also stopped in a debugger in ImageToImageFilter (of my
> BinaryFunctorImageFilter) where the check that the physical regions overlap
> is performed. At this point, both images have the same region index [5, 5],
> but one image has origin (0, 0) and the sliced image has origin (1.5, 1.5).
>
>
>
>
> --
> Sent from: http://itk-users.7.n7.nabble.com/
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