[vtkusers] error when connecting ITK with VTK

[Ralf.Denhof]

Sorry...

This example contains generated data and represents the constellation in 
my project. Thanks for being patient with me :)
/
#include "vtkSmartPointer.h"
#include "vtkJPEGReader.h"
#include "itkImageToVTKImageFilter.h"
#include "itkVTKImageToImageFilter.h"
#include "vtkImageCast.h"
#include "vtkImageActor.h"
#include "itkBinaryThresholdImageFilter.h"
#include "vtkImageViewer2.h"
#include "vtkRenderWindowInteractor.h"
#include "vcl_cstdlib.h"

int main(int argc,char*argv[]){

     typedef itk::Image<unsigned char,2> imagetype;

     imagetype::IndexType start;
     start[0]=0;
     start[1]=0;

     imagetype::SizeType  size;
     size[0]=16;
     size[1]=16;

     imagetype::RegionType region;
     region.SetSize(size);
     region.SetIndex(start);

     imagetype::Pointer img=imagetype::New();
     img->SetRegions(region);
     img->Allocate();

     imagetype::IndexType pixelValue1;
     int pixval=0;
     for (int y=size[1]-1;y>=0;y--)
         for (int x=0;x<size[0];x++)
         {
             pixelValue1[0]=x;
             pixelValue1[1]=y;
             img->SetPixel(pixelValue1,255- rand()%256);
             pixval++;
         }

         img->Update();

         itk::ImageToVTKImageFilter<imagetype>::Pointer 
itk2vtk1=itk::ImageToVTKImageFilter<imagetype>::New();
         itk2vtk1->SetInput(img);
         itk2vtk1->Update();

         vtkSmartPointer<vtkImageActor> 
actor=vtkSmartPointer<vtkImageActor>::New();
         actor->SetInput(itk2vtk1->GetOutput());
         vtkSmartPointer<vtkRenderWindowInteractor> 
interactor=vtkSmartPointer<vtkRenderWindowInteractor>::New();

         vtkSmartPointer<vtkImageViewer2> 
viewer=vtkSmartPointer<vtkImageViewer2>::New();
         viewer->SetInput(itk2vtk1->GetOutput());
         viewer->SetupInteractor(interactor);

         interactor->Initialize();
         viewer->Render();
         interactor->Start();

         vtkSmartPointer<vtkImageCast> 
caster=vtkSmartPointer<vtkImageCast>::New();
         caster->SetInput(viewer->GetImageActor()->GetInput());
         caster->SetOutputScalarTypeToUnsignedChar();

         itk::VTKImageToImageFilter<imagetype>::Pointer 
vtk2itk=itk::VTKImageToImageFilter<imagetype>::New();
         vtk2itk->SetInput(caster->GetOutput());
         vtk2itk->Update();

         itk::BinaryThresholdImageFilter<imagetype,imagetype>::Pointer 
binaryfilter=itk::BinaryThresholdImageFilter<imagetype,imagetype>::New();
         binaryfilter->SetLowerThreshold(125*(-1));
         binaryfilter->SetInput(vtk2itk->GetOutput());
         binaryfilter->Update();

         itk::ImageToVTKImageFilter<imagetype>::Pointer 
itk2vtk=itk::ImageToVTKImageFilter<imagetype>::New();
         itk2vtk->SetInput(binaryfilter->GetOutput());
         itk2vtk->Update();

         vtkSmartPointer<vtkImageViewer2> 
viewer2=vtkSmartPointer<vtkImageViewer2>::New();
         viewer->SetInput(itk2vtk->GetOutput());
         viewer->SetupInteractor(interactor);

         interactor->Initialize();
         viewer->Render();
         interactor->Start();


}
/
Am 04.12.2011 22:41, schrieb David Doria:
> On Sun, Dec 4, 2011 at 4:34 PM, Ralf.Denhof<ralf.denhof at gmx.de>  wrote:
>> I think this reproduces the error, but I had to run it in Debug-Mode. Then
>> it went into the part where the described error is generated.
>>
>>      typedef itk::Image<unsigned char,2>  imagetype;
>>      vtkSmartPointer<vtkJPEGReader>
>> reader=vtkSmartPointer<vtkJPEGReader>::New();
>>      reader->SetFileName("1.jpg");
>>
>>      vtkSmartPointer<vtkImageActor>
>> actor=vtkSmartPointer<vtkImageActor>::New();
>>      actor->SetInput(reader->GetOutput());
>>
>>      vtkSmartPointer<vtkImageCast>
>> caster=vtkSmartPointer<vtkImageCast>::New();
>>      caster->SetInput(actor->GetInput());
>>      caster->SetOutputScalarTypeToUnsignedChar();
>>
>>      itk::VTKImageToImageFilter<imagetype>::Pointer
>> vtk2itk=itk::VTKImageToImageFilter<imagetype>::New();
>>      vtk2itk->SetInput(caster->GetOutput());
>>      vtk2itk->Update();
>>
>>      itk::BinaryThresholdImageFilter<imagetype,imagetype>::Pointer
>> binaryfilter=itk::BinaryThresholdImageFilter<imagetype,imagetype>::New();
>>      binaryfilter->SetLowerThreshold(125*(-1));
>>      binaryfilter->SetInput(vtk2itk->GetOutput());
>>      binaryfilter->Update();
>>
>>      itk::ImageToVTKImageFilter<imagetype>::Pointer
>> itk2vtk=itk::ImageToVTKImageFilter<imagetype>::New();
>>      itk2vtk->SetInput(binaryfilter->GetOutput());
>>      itk2vtk->Update();
>>
>>      vtkSmartPointer<vtkRenderWindowInteractor>
>> interactor=vtkSmartPointer<vtkRenderWindowInteractor>::New();
>>
>>      vtkSmartPointer<vtkImageViewer2>
>> viewer=vtkSmartPointer<vtkImageViewer2>::New();
>>      viewer->SetInput(itk2vtk->GetOutput());
>>      viewer->SetupInteractor(interactor);
>>
>>      interactor->Initialize();
>>      viewer->Render();
>>      interactor->Start();
> Ralf,
>
> This is still not self contained. The main problem is you didn't send
> 1.jpg. You should prefer programmatically generating the input rather
> than needing an external file when creating small test cases like
> this. Also, the includes are missing, main is missing, etc. The ideal
> case (for me, and I'd imagine anyone else trying to help someone) is
> to be able to copy+paste+build and see the exact same thing you're
> seeing.
>
> David

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