[Insight-users] runtime error using ITK + VTK + QT (QVTKWidget)

[Dominic]

Hi, 

I am using ItkVTKGlue and vtkImageSlice to display two images (on top of
each other) in QVTKWidget.
When I am using vtkImageData everything works fine. Now I try to use
itkImage instead using ItkVTKGlue. 
Everything compiles fine, but I get a runtime error "Access violation when
reading at position 0xffffffffffffffff" a startup at:

void VTKImageExportBase::UpdateInformationCallbackFunction(void *userData)
{
static_cast< VTKImageExportBase * >
( userData )->UpdateInformationCallback();//the error is here
}

Am I doing something wrong? 

Thanks a lot in advance!

It follows the crucial part of the code:

...

#include "itkRGBAPixel.h"
#include "itkImage.h"
#include "itkImageRegionIterator.h"
#include "itkImageToVTKImageFilter.h"

typedef itk::RGBAPixel<quint8> PixelType;
typedef itk::Image<PixelType, 2>  ImageType;
typedef itk::ImageToVTKImageFilter<ImageType> FilterType;

...

vtkSmartPointer<vtkImageData> DICOMimageMask =
vtkSmartPointer<vtkImageData>::New();
DICOMimageMask->SetExtent(0 , 512 - 1 , 0 , 512 - 1 , 0 , 0);
DICOMimageMask->SetOrigin(0.0 , 0.0 , 0.0);
DICOMimageMask->SetSpacing(1.0 , 1.0 , 1.0);
DICOMimageMask->SetScalarTypeToUnsignedChar();
DICOMimageMask->SetNumberOfScalarComponents(4);
DICOMimageMask->AllocateScalars();

// init Pixels
... 

ImageType::RegionType region;
ImageType::IndexType start;
start[0] = 0;
start[1] = 0;

ImageType::SizeType size;
size[0] = 512;
size[1] = 512;

region.SetSize(size);
region.SetIndex(start);

ImageType::Pointer image = ImageType::New();
image->SetRegions(region);
image->Allocate();

// init Pixels
... 

FilterType::Pointer connector = FilterType::New();
connector->SetInput(image);
connector->Update();

// this image (imageData) is already initialised
vtkSmartPointer<vtkImageSliceMapper> DICOMimageSliceMapper =
vtkSmartPointer<vtkImageSliceMapper>::New();
DICOMimageSliceMapper->SetInputConnection(imageData->GetProducerPort());

vtkSmartPointer<vtkImageSlice> DICOMimageSlice =
vtkSmartPointer<vtkImageSlice>::New();
DICOMimageSlice->SetMapper(DICOMimageSliceMapper);
DICOMimageSlice->GetProperty()->SetOpacity(1.0);
//DICOMimageSlice->GetProperty()->SetInterpolationType(0);

vtkSmartPointer<vtkImageSliceMapper> DICOMimageMaskSliceMapper =
vtkSmartPointer<vtkImageSliceMapper>::New();

	// this of course works 

DICOMimageMaskSliceMapper->SetInputConnection(DICOMimageMask->GetProducerPort());

	// this doesn't work
	DICOMimageMaskSliceMapper->SetInput(connector->GetOutput());

	// doesn't work
	DICOMimageMask = connector->GetOutput();

DICOMimageMaskSliceMapper->SetInputConnection(DICOMimageMask->GetProducerPort());

	// this works, but is not really senseful
	DICOMimageMask->DeepCopy(connector->GetOutput());

DICOMimageMaskSliceMapper->SetInputConnection(DICOMimageMask->GetProducerPort());

vtkSmartPointer<vtkImageSlice> DICOMimageMaskSlice =
vtkSmartPointer<vtkImageSlice>::New();
DICOMimageMaskSlice->SetMapper(DICOMimageMaskSliceMapper);
DICOMimageMaskSlice->GetProperty()->SetOpacity(1.0);
DICOMimageMaskSlice->GetProperty()->SetInterpolationType(0);

// Renderer
renderer = vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(DICOMimageSlice);
renderer->AddActor(DICOMimageMaskSlice);

//renderer->ResetCamera();

// RenderWindow (from QVTK-Widget)
vtkSmartPointer<vtkRenderWindow> renderWindow =
ui.qvtkWidget->GetRenderWindow();
renderWindow->AddRenderer(renderer);

// RenderWindowInteractor
...

// Picker
...

// Render and start interaction
...




--
View this message in context: http://itk-insight-users.2283740.n2.nabble.com/runtime-error-using-ITK-VTK-QT-QVTKWidget-tp7582936.html
Sent from the ITK Insight Users mailing list archive at Nabble.com.