# ImageToVTKImageFilter usage in python
**URL:** https://discourse.itk.org/t/imagetovtkimagefilter-usage-in-python/1023
**Category:** Beginner Questions
**Tags:** python
**Created:** [June 21, 2018, 9:47am UTC](https://discourse.itk.org/t/imagetovtkimagefilter-usage-in-python/1023 "2018-06-21T09:47:53Z")
**Posts on this page:** 1
**Page:** 1
### Author:  [@Edern\_Haumont](https://discourse.itk.org/u/Edern_Haumont)
#### Post date: [June 21, 2018, 9:47am UTC](https://discourse.itk.org/t/imagetovtkimagefilter-usage-in-python/1023/1 "2018-06-21T09:47:55Z")
Good morning,
I am back with another (potentially trivial for a non-beginner) problem !
I have an image read by a ImageSeriesReader.
Now I want to pass it through an ImageToVTKImageFilter to get an ImageData and apply some transforms, visualize it, etc.
The thing is, the output of my ImageToVTKImageFilter is always None.
What I did so far:
- I checked hat the input image is valid by writing it as a vtk file and visualizing it in paraview.
- I tried to create manually an image and pass it instead as the input. Same result.
- I printed the filter and got the output you can see below
ImageToVTKImageFilter (0x1920120)
RTTI typeinfo: itk::ImageToVTKImageFilter\ \>
Reference Count: 1
Modified Time: 1784
Debug: Off
Object Name:
Observers:
none
Inputs:
Primary: (0)
Indexed Inputs:
0: Primary (0)
No Required Input Names
NumberOfRequiredInputs: 0
Outputs:
Primary: (0)
Indexed Outputs:
0: Primary (0)
NumberOfRequiredOutputs: 0
Number Of Threads: 8
ReleaseDataFlag: Off
ReleaseDataBeforeUpdateFlag: On
AbortGenerateData: Off
Progress: 0
Multithreader:
RTTI typeinfo: itk::PoolMultiThreader
Reference Count: 1
Modified Time: 1783
Debug: Off
Object Name:
Observers:
none
Here is the piece of code not working:
itkToVtkFilter = itk.ImageToVTKImageFilter[ImageType].New()
itkToVtkFilter.SetInput(image)
itkToVtkFilter.Update()
volume = itkToVtkFilter.GetOutput()
Do you have an idea of what is wrong here ?
Thanks a lot.
Edern