[Insight-users] Problem of ImageToVTKImageFilter, when displaying 2 images

[ask ITK]

Thanks a lot for the suggestion...
but the problem seems to exist...but in other form.....
Now half of the first image is destroyed after loading the second image....

Error message now becomes:
ERROR: In D:\Research\VTK\src\Imaging\vtkImageImport.cxx, line 303
vtkImageImport (020D50E0): Unknown exception.

ERROR: In D:\Research\VTK\src\Imaging\vtkImageImport.cxx, line 324
vtkImageImport (020D50E0): Unknown exception.

I change my code like this....
=================================================
void ApplicationCore::callViewer(ImagePtr image, int choice)
{
	m_ImageViewer[choice]->SetupInteractor( m_renderWindowInteractor[choice]);

	// new the connector every time
	itkvtkConnectorPtr itkvtkconnector = itkvtkConnectorType::New() ;
	itkvtkconnector->SetInput( image );
	m_ImageViewer[choice]->SetInput( itkvtkconnector->GetOutput() );
	
	m_ImageViewer[choice]->SetSize(image->GetLargestPossibleRegion().GetSize()[0],image->GetLargestPossibleRegion().GetSize()[1]);
	m_ImageViewer[choice]->Render();
	m_ImageViewer[choice]->SetColorWindow( 255);
	m_ImageViewer[choice]->SetColorLevel( 128);
//	m_renderWindowInteractor[choice]->Start();
}

==================================================




2006/1/26, Patrick Cheng <cheng at isis.georgetown.edu>:
> Hi,
>
> This is a long existing problem. Trying to figure out why too.
>
> A quick and dirty fix is to instantiate a new itkImageToVTKImageFilter
> every time you read a new image.
>
> Patrick
>
>
>
> ask ITK wrote:
> > Problem occurs when I want to use itkImageToVTKImageFilter to display
> > 2 different images.
> >
> > I want to display to different image with the VTK viewer..
> > of coz I think it requires 2 different viewers and 2 different interactors.
> > So I created 2 for both of them.
> >
> > Loading the first image is fine, but after I load teh second image,
> > the first image also become the second image!
> > I don't know how to solve this problem...so please help...
> >
> > following error is displayed:
> >
> > ERROR: In D:\Research\VTK\src\Filtering\vtkStreamingDemandDrivenPipeline.cxx,
> > line 643
> > vtkImageImportExecutive (020D8F78): The update extent specified in the
> > information for output port 0 on algorithm vtkImageImport(020D8AD0) is
> > 0 142 0 167 0 0, which is outside the whole extent 0 141 0 166 0 0.
> >
> > I attached my code below, very short, can I can run the program
> > smoothly except the stated error. Please help, thanks!
> > =======================================================
> >
> > void ApplicationCore::callViewer(ImagePtr image, int choice)
> > {
> >       m_itkvtkconnector[choice]->SetInput( image );
> >
> >       m_ImageViewer[choice]->SetupInteractor( m_renderWindowInteractor[choice]);
> >       m_ImageViewer[choice]->SetInput( m_itkvtkconnector[choice]->GetOutput() );
> >       m_ImageViewer[choice]->SetSize(image->GetLargestPossibleRegion().GetSize()[0],image->GetLargestPossibleRegion().GetSize()[1]);
> >       m_ImageViewer[choice]->Render();
> >       m_ImageViewer[choice]->SetColorWindow( 255);
> >       m_ImageViewer[choice]->SetColorLevel( 128);
> > //    m_renderWindowInteractor[choice]->Start();
> > }
> > =======================================================
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> >
> >
>