[ITK] [ITK-users] Problem with itkImageToVTKImageFilter

[SiavashK]

Hello,

I am having a bit of issue with itkImageToVTKImageFilter. My goal is simple,
I would like to convert an ITK image to a VTK image in order to display it
in a QVTKWidget. To this end, I have created an instance
itkImageToVTKImageFilter, to which I feed my ITK Image.

The issue is that the size/spacing of my images change depending on the
state of my GUI. As I have read through the mailing list, this is typically
handled by calling UpdateLargestPossibleRegion() instead of Update() on the
filter (for example see  this
<http://www.itk.org/ITKExamples/src/Core/Common/ReRunPipelineWithChangingLargestPossibleRegion/Documentation.html> 
).

My issue is that calling UpdateLargestPossibleRegion() does not seem to
produce any output. 

I have attached a small working example to illustrate this. I would be happy
if anyone could tell me what I am doing wrong, or if there is a bug in this
filter.

Usage is:
>> imageToVTKImageTest.exe 1.png 2.png

CMakeLists.txt
<http://itk-insight-users.2283740.n2.nabble.com/file/n7587561/CMakeLists.txt>  
imageToVTKImageTest.cxx
<http://itk-insight-users.2283740.n2.nabble.com/file/n7587561/imageToVTKImageTest.cxx>  
1.png <http://itk-insight-users.2283740.n2.nabble.com/file/n7587561/1.png>  
2.png <http://itk-insight-users.2283740.n2.nabble.com/file/n7587561/2.png>  



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