[vtkusers] How to show dicoms with vtk (ImageToVTKImageFilter)

[soheilghafurian]

My problem is I load a dicom file and I try to show it through vtk by
ImageToVTKImageFilter. But the result is kind of distorted. I think the
problem is because the pixeltype is not good, but when I use another type, I
get this message when the program is running: 

ERROR: In ..\..\Rendering\vtkImageActor.cxx, line 267 
vtkOpenGLImageActor (058C5340): This filter requires unsigned char scalars
as input 

Could anyone help me on how I should solve this problem? here is the code: 

int main() 
{ 
        char *fName = fl_file_chooser("Pick the fixed dicom Image", "*.dcm",
"."); 
      if(fName == NULL) return 0; 

          typedef itk::Image< unsigned char, 2> ImageType; 
  typedef itk::ImageFileReader<ImageType>             ReaderType; 
  typedef itk::ImageToVTKImageFilter<ImageType>       ConnectorType; 
  
  ReaderType::Pointer reader = ReaderType::New(); 
  ConnectorType::Pointer connector = ConnectorType::New(); 
  
  reader->SetFileName(fName); 
  reader->Update(); 
  connector->SetInput(reader->GetOutput()); 


  
  vtkSmartPointer<vtkImageActor> actor = 
    vtkSmartPointer<vtkImageActor>::New(); 
//  actor->SetInput(connector->GetOutput()); 
  actor->SetInput(connector->GetOutput()); 
  
  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New(); 
  renderer->AddActor(actor); 
  renderer->ResetCamera(); 
  
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New(); 
  renderWindow->AddRenderer(renderer); 
  
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New(); 
  vtkSmartPointer<vtkInteractorStyleImage> style = 
    vtkSmartPointer<vtkInteractorStyleImage>::New(); 
  
  renderWindowInteractor->SetInteractorStyle(style); 
  
  renderWindowInteractor->SetRenderWindow(renderWindow); 
  renderWindowInteractor->Initialize(); 
  
  renderWindowInteractor->Start(); 
  
  return EXIT_SUCCESS; 
} 


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