[Insight-users] Problem using ImageToVTKImageFilter and QVTKWidget

[Luis Ibanez]

Hi Francois,

This looks like a bug in the itkImageToVTKImageFilter,
probably associated with the pipeline negotiation for
the requested image region.

Could you please do the following:

a) Log a bug report in MANTIS:
    http://public.kitware.com/Bug/my_view_page.php


b) try using the convenience classes:

InsightApplications/Auxiliary/vtk/

vtkKWImage.cxx
vtkKWImage.h
vtkKWImageIO.cxx
vtkKWImageIO.h

You will find them explained in the Insight Journal paper:

http://www.insight-journal.org/browse/publication/146


It will be interesting to see if the same problem happens
with these classes or not.

You may also find convenient the way in which these
classes deal with image reading.


     Regards,


           Luis


---------------------------------------------------------------------------
2009/10/5 Françoise Lefebvre <lefebvre at imnc.in2p3.fr>:
>
> Hello,
>
> I got a problem using ImageToVTKImageFilter together with QVTKWidget in QT.
>
> I am using Qt4.4.3, vtk5.4, itk3.14, msvc2008.
>
>
> Here's part ok my code:
>
> typedef itk::Image<unsigned short,2>            ImageType;
> typedef itk::ImageFileReader<ImageType>         ReaderType;
> typedef itk::ImageToVTKImageFilter<ImageType>   ConnectorType;
>
> vtkPNGReader* readerVTK = vtkPNGReader::New();
> readerVTK->SetFileName("file.png");
>
> ReaderType::Pointer readerITK = ReaderType::New();
> readerITK->SetFileName("file.png");
> ConnectorType::Pointer connector = ConnectorType::New();
> connector->SetInput( readerITK->GetOutput() );
>
> vtkImageData* vtkimage = vtkImageData::New();
> // Uses VTK Classes to read -> OK
> vtkimage = readerVTK->GetOutput();
> // Uses ITK_VTK Connector -> segmentation fault
> vtkimage = connector->GetOutput();
>
> vtkImageViewer* viewer = vtkImageViewer::New();
> viewer->SetInput(vtkimage );
> qvtkWidget->SetRenderWindow(viewer->GetRenderWindow());
>
> viewer->SetupInteractor(qvtkWidget->GetRenderWindow()->GetInteractor());
> viewer->Render();
> viewer->SetColorWindow( 254 );
> viewer->SetColorLevel( 128 );
>
>
>
> Using QVTKWidget and a vtkReader (vtkPNGReader in my case) works fine but
> using QVTKWidget  and an ImageToVTKImageFilter connector makes the program
> crash in the paintEvent.
>
> When turning on the setAutomaticImageCacheEnabled to true, the program
> crashes in the paintEvent when the window is resized (size increased).
>
> Thanks for your help
>
>
> Françoise LEFEBVRE
>
>
>
>
>
>
>
>
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