[ITK-users] Geodesic Active Contour Error: Inputs do not occupy the same physical space!

[Matt McCormick]

Hi Robert,

Has ->Update() been called on all filters before checking their output
Origin's? If the origin is checked before the image has been
populated, it might not be the correct value.

HTH,
Matt

On Mon, May 16, 2016 at 11:30 AM, Robert <scorpiuni at gmail.com> wrote:
> Hi,
> I have an error which I can't find a solution for (or even the origin of
> it):
>
> I have a 3D Volume, which I preprocess with several filters:
>
>   smoothing->SetInput( reader->GetOutput() );
>
>   gradientMagnitude->SetInput( smoothing->GetOutput() );
>
>   sigmoid->SetInput( gradientMagnitude->GetOutput() );
>
>   std::cout << "-------After sigmoid IMPORTANT--------"<< std::endl;
>   const InternalImageType::PointType & origin2 =
> sigmoid->GetOutput()->GetOrigin();
>   std::cout << "Origin = ";
>   std::cout << origin2[0] << ", "
>   << origin2[1] << ", "
>   << origin2[2] << std::endl;
>
> The Origin Output here is 0,0,0 as expected.
> Now I do this:
>
> geodesicActiveContour->SetInput(  fastMarching->GetOutput() );
>
>
>   std::cout << "-------After fastmarching -> GetOutput()
> IMPORTANT--------"<< std::endl;
>   const InternalImageType::PointType & origin3 =
> fastMarching->GetOutput()->GetOrigin();
>   std::cout << "Origin = ";
>   std::cout << origin3[0] << ", "
>   << origin3[1] << ", "
>   << origin3[2] << std::endl;
>
> //Output still is 0 0 0
>
>   float ori[3] = {0, 0, 0};
>   sigmoid->GetOutput()->SetOrigin(ori);
>   geodesicActiveContour->SetFeatureImage( sigmoid->GetOutput() );
>   const InternalImageType::PointType & originx =
> sigmoid->GetOutput()->GetOrigin();
>   std::cout << "Origin Important= ";
>   std::cout << originx[0] << ", "
>   << originx[1] << ", "
>   << originx[2] << std::endl;
>
> Again, here, the cout for the origin says 0,0,0, which should be correct,
> and work with the filter.
> Now when I execute the whole thing, this pops up:
>
> Exception caught !
>
> itk::ExceptionObject (0xfb0a10)
> Location: "void itk::ImageToImageFilter<TInputImage,
> TOutputImage>::VerifyInputInformation() [with TInputImage =
> itk::Image<float, 3u>; TOutputImage = itk::Image<float, 3u>]"
> File: /usr/local/include/ITK-4.9/itkImageToImageFilter.hxx
> Line: 250
> Description: itk::ERROR: GeodesicActiveContourLevelSetImageFilter(0xf87d40):
> Inputs do not occupy the same physical space!
> InputImage Origin: [0.0000000e+00, 0.0000000e+00, 0.0000000e+00],
> InputImage_1 Origin: [7.2991424e+00, 1.0553263e+01, -7.8717673e+00]
>         Tolerance: 1.0000000e-06
> InputImage Spacing: [1.0000000e+00, 1.0000000e+00, 1.0000000e+00],
> InputImage_1 Spacing: [1.6000000e-01, 1.6000000e-01, 1.5999985e-01]
>         Tolerance: 1.0000000e-06
> InputImage Direction: 1.0000000e+00 0.0000000e+00 0.0000000e+00
> 0.0000000e+00 1.0000000e+00 0.0000000e+00
> 0.0000000e+00 0.0000000e+00 1.0000000e+00
> , InputImage_1 Direction: -1.0000000e+00 0.0000000e+00 0.0000000e+00
> 0.0000000e+00 -1.0000000e+00 0.0000000e+00
> 0.0000000e+00 0.0000000e+00 1.0000000e+00
>
>         Tolerance: 1.0000000e-06
>
> No matter what I set the origin to (called ori in the above code), this
> output stays the same.
>
> InputImage_1 should be my sigmoid Image, however, right? Why does the
> spacing, origin, etc change here?
> Any help is appreciated!
>
> Robert
>
>
>
> --
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