[Insight-users] connecting Itk and Vtk in python

[Bruno Cassaro]

>Hi,
>
>i'm trying to connect itk and vtk in python. I tried:
 >>>> conector=itkVTKImageExportUS2_New()
>
>but
>
 >>>> dir(conector)
>['AbortGenerateDataOff',... >'GetNumberOfValidRequiredInputs', 
>'GetOutputs', 'GetPipelineModifiedCallback',... ]
>
>I didn't find a 'GetOutput' method, but a 'MakeOutput' >and 'GetOutputs'. 
>On the other hand, i have seen the Insight Application 
>'ConnectVTKITKPython' in the itk examples.
>
>What is the right way to do the connection in python? Is >the 
>itkVTKImageExport still working? What
>
>Thanks a lot,
>
>-Eduardo

Hi Eduardo,
First you'll need compile InsightApplication ..... so you con use ConnectVTKITK !!!! 

For example try this code :





##################################################

import vtk

import InsightToolkit as itk

import ConnectVTKITK as vtkitk

reader = vtk.vtkImageReader()

...



# transform in FLOAT

imageCast = vtk.vtkImageCast()

imageCast.SetInput(reader.GetOutput())

imageCast.SetOutputScalarTypeToFloat()

imageCast.Update()

#VTK export

vtkExporter = vtk.vtkImageExport()

vtkExporter.SetInput(imageCast.GetOutput())

itkImporter = itk.itkVTKImageImportF2_New()

vtkitk.ConnectVTKToITKF2(vtkExporter, itkImporter.GetPointer())

itkImporter.Update()



# filter

otsu = itk.itkOtsuThresholdImageCalculatorF2_New()

otsu.SetImage(itkImporter.GetOutput())

otsu.Compute()



# ITK - > VTK

itkExporter = itk.itkVTKImageExportF2_New()

itkExporter.SetInput(itkImporter.GetOutput())

vtkImporter = vtk.vtkImageImport()

vtkitk.ConnectITKF2ToVTK(itkExporter.GetPointer(), vtkImporter)

vtkImporter.Update()

# print

mapper2D = vtk.vtkImageMapper()

mapper2D.SetInput(vtkImporter.GetOutput())#thresh.GetOutput())

mapper2D.SetColorLevel(level)

mapper2D.SetColorWindow(window)

imageActor2D = vtk.vtkActor2D()

imageActor2D.SetMapper(mapper2D)

ren2D = vtk.vtkRenderer()

ren2D.AddActor(imageActor2D)

win2D = vtk.vtkRenderWindow()

win2D.AddRenderer(ren2D)

win2D.Render()



##################################################

to work with this you will have set PYTHONPATH with InsightToolkit ,Application and VTK

Bruno Cassaro






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