[Insight-users] Connecting Output from vtkWin32VideoSource to ITK

[PeterW]

Hello,

I'm new in using ITK and VTK. I'm using vtkWin32VideoSource to grab images
from a framegrabber and I want to use ITK filters on these images. The
problem is to get ITK to work with VTK-images. I tried different approaches
like the "itkVTKImageToImageFilter.h" /"itkImageToVTKImageFilter.h" or the
"vtkKWImage.h"/"vtkKWImageIO.h" but I didn't get ITK to work with the input
from VTK. I testet a few 
things like...

        //WindowInteractor
	vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();

	//Bild einladen
	//vtkJPEGReader *reader = vtkJPEGReader::New();
	vtkBMPReader *reader = vtkBMPReader::New();
	reader->SetFileName("D:/Tests/ITK+VTK-Test1/src/test24.bmp");

	vtkImageCast *caster = vtkImageCast::New();
	caster->SetInput(reader->GetOutput());
	caster->SetOutputScalarTypeToFloat();
	caster->Modified();
	caster->Update();

	//ITK-Part
	typedef itk::Image<float, 2> ImageType;
	typedef itk::VTKImageToImageFilter<ImageType> InputFilterType;
	typedef itk::ImageToVTKImageFilter<ImageType> OutputFilterType;
	//typedef itk::GradientMagnitudeImageFilter<ImageType,ImageType>
FilterType;

	InputFilterType::Pointer vtktoitk = InputFilterType::New();
	OutputFilterType::Pointer itktovtk = OutputFilterType::New();
	//FilterType::Pointer itkfilter1 = FilterType::New();
	
	//VTK-Import
	vtktoitk->SetInput(caster->GetOutput());
	vtktoitk->GetImporter()->Update();
	vtktoitk->Update();
	
	//ITK-Filter1
	//itkfilter1->SetInput(vtktoitk->GetOutput());
	//itkfilter1->Update();

	//VTK-Export
	itktovtk->SetInput(vtktoitk->GetOutput());
	itktovtk->Update();


	//VTK-Part2

	//Image-Viewer
	vtkImageViewer *viewer = vtkImageViewer::New();
	viewer->SetInput(itktovtk->GetOutput());
	viewer->SetupInteractor(iren);
	viewer->SetColorWindow(255);
        viewer->SetColorLevel(128);
	viewer->Render();

	//Anzeigen
	iren->Initialize();
	iren->Start();

	//Aufräumen
	reader->Delete();
	viewer->Delete();
        iren->Delete();

...but I alway get exceptions in connection to itkLightObject. To read a
file via ITK and manage the ouput with VTK is no problem but I want to
achieve to use the input from vtkWin32VideoSource and I don't know a way to
get ITK to work with a framegrabber, so I have to use VTK-input. Could be
that I make a few poor mistakes, but I don't know how to get on with the
problem. So can someone please help me?
Thanks in avanced.

Peter

PS: Please excuse my poor English.
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