[Insight-users] vtk/itk connection problem in python

[John Hunter]

I am writing some sample scripts to test the vtk/itk connection
pipeline using ConnectVTKITK from the InsightApplications directory.
I'm not yet trying to do anything with the images in ITK, just
exercising the mechanics of cross-talk.

My first script, which uses an itk reader and a vtk viewer, worked as expected

    import ConnectVTKITK as connect

    reader = connect.itkImageFileReaderF2_New()
    reader.SetFileName('/home/jdhunter/media/images/leo_ratner.jpg')

    itkExport = connect.itkVTKImageExportF2_New()
    itkExport.SetInput(reader.GetOutput())
    vtkImport = connect.vtkImageImport()
    connect.ConnectITKF2ToVTK(itkExport.GetPointer(), vtkImport)


    viewer = connect.vtkImageViewer()
    viewer.SetInput(vtkImport.GetOutput())
    viewer.Render()

In my second script, I'm trying to use a vtk reader, pass this off to
itk for some processing, and then back to vtk for visualizing.  I'm
not actually doing any itk processing as this is just a test script,
but basically I do

vtkread -> vtk2itk -> itk2vtk - >vtk visualize

but I get an abort when I call the vtk image viewer Render method.

Can someone point me to the light?


    import ConnectVTKITK as connect

    reader = connect.vtkImageReader()
    reader.SetFileName('/home/jdhunter/media/images/leo_ratner.jpg')

    vtkExport = connect.vtkImageExport()
    vtkExport.SetInput(reader.GetOutput())
    itkImport = connect.itkVTKImageImportF2_New()  # import into itk

    connect.ConnectVTKToITKF2(vtkExport, itkImport.GetPointer())

    print 'VTK->ITK complete'

    # In this example we simply pass the image back to vtk w/o doing
    # anything to exercise the syntax.  In real life we would run some itk
    # filters.


    itkExport = connect.itkVTKImageExportF2_New()  # export from itk
    itkExport.SetInput(itkImport.GetOutput())

    vtkImport = connect.vtkImageImport()
    connect.ConnectITKF2ToVTK(itkExport.GetPointer(), vtkImport)

    print 'ITK->VTK complete'


    viewer = connect.vtkImageViewer()
    viewer.SetInput(vtkImport.GetOutput())
    print 'Render, man!'
    viewer.Render()


Thanks!  ITK 2.0.0, VTK 4.4

JDH