[Insight-users] itkImageToVTKImageFilter doesn't release it's data.

[Michal Postrozny]

Hello!

Could somebody tell me how can I release data from
itkImageToVTKImageFilter? I've tried using
ReleaseDataFlagOn method but it doesn't seem to change anything.

For example when I set a small pipeline:

  ImageFileReader -> RegionOfInterestImageFilter
  -> RescaleIntensityImageFilter -> ImageToVTKImageFilter
  -> vtkImageShiftScale

And set ReleaseDataFlagOn for all filters, after updating
vtkImageShiftScale, the data from ITK2VTK filter is not released.
(I can see that in windows task manager - memory usage increases after
calling vtkImageShiftScale->Update(), while it should remain almost
the same)

I'm enclosing example which incorporates this behaviour.


Thanks in advance

Michal Postrozny
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PROJECT( ReleaseTest )


  FIND_PACKAGE(ITK)
  IF(ITK_FOUND)
    INCLUDE(${ITK_USE_FILE})
  ELSE(ITK_FOUND)
    MESSAGE(FATAL_ERROR
            "Cannot build InsightApplications without ITK.  Please set ITK_DIR.")
  ENDIF(ITK_FOUND)


  FIND_PACKAGE(VTK)
  IF (VTK_FOUND)
      INCLUDE (${VTK_USE_FILE})
  ENDIF (VTK_FOUND)

ADD_EXECUTABLE(release release.cxx)

TARGET_LINK_LIBRARIES(release 
	ITKAlgorithms ITKBasicFilters ITKCommon ITKIO ITKNumerics ITKIO 
              vtkRendering
	)

# vtkGraphics vtkHybrid vtkImaging  vtkFiltering vtkRendering vtkIO vtkCommon