# Save itk image with custom voxel spacing
**URL:** https://discourse.itk.org/t/save-itk-image-with-custom-voxel-spacing/3634
**Category:** Beginner Questions
**Tags:** python
**Created:** [November 19, 2020, 1:58pm UTC](https://discourse.itk.org/t/save-itk-image-with-custom-voxel-spacing/3634 "2020-11-19T13:58:11Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@farhan\_009](https://discourse.itk.org/u/farhan_009)
#### Post date: [November 19, 2020, 1:58pm UTC](https://discourse.itk.org/t/save-itk-image-with-custom-voxel-spacing/3634/1 "2020-11-19T13:58:11Z")
Hello everyone!
I got output from the model which is a NumPy array of shape [128,448,448] .I converted to itkobject using **itk.image\_view\_from\_array(predicted\_label)** and save the image with **itkwrite**.But shape of input image was [448 448 128] with voxel spacing[0.5134 0.5134 0.8] but **itk.write** gives output[448 448 128] with voxel spacing [1 1 1].Any solution for this problem as I want output image with custom voxel spacing as shape([448 448 128],[0.5134 0.5134 0.8])
I tried to use nibabel but reshape the image distorts the result.
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### Author:  [@farhan\_009](https://discourse.itk.org/u/farhan_009)
#### Post date: [November 19, 2020, 2:00pm UTC](https://discourse.itk.org/t/save-itk-image-with-custom-voxel-spacing/3634/2 "2020-11-19T14:00:04Z")
@matt.mccormick, @Stephen_Aylward
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### Author:  [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [November 19, 2020, 2:30pm UTC](https://discourse.itk.org/t/save-itk-image-with-custom-voxel-spacing/3634/3 "2020-11-19T14:30:09Z")
You could use [ChangeInformationImageFilter](https://itk.org/Doxygen/html/classitk_1_1ChangeInformationImageFilter.html). That is especially easy if you have the original image in ITK format. [Example](https://itk.org/ITKExamples/src/Filtering/ImageGrid/ChangeImageOriginSpacingOrDirection/Documentation.html).
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### Author:  [@phcerdan](https://discourse.itk.org/u/phcerdan)
#### Post date: [November 19, 2020, 2:33pm UTC](https://discourse.itk.org/t/save-itk-image-with-custom-voxel-spacing/3634/4 "2020-11-19T14:33:42Z")
Or `SetSpacing` in your itk python image.
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### Author:  [@farhan\_009](https://discourse.itk.org/u/farhan_009)
#### Post date: [November 19, 2020, 3:29pm UTC](https://discourse.itk.org/t/save-itk-image-with-custom-voxel-spacing/3634/5 "2020-11-19T15:29:20Z")
> [@dzenanz](#):
>
> [ChangeInformationImageFilter](https://itk.org/Doxygen/html/classitk_1_1ChangeInformationImageFilter.html)
```
filter = itk.ChangeInformationImageFilter.New(___) # itk image
filter.SetUseReferenceImage(True)
filter.SetChangeSpacing(True)
output_spacing = [0.5134, 0.5134 0.8]
filter.SetOutputSpacing(output_spacing)
writerInput =filter.GetOutput()
writer = itk.ImageFileWriter[ImageType].New()
writer.SetFileName(outputFilePath)
writer.SetInput(writerInput)
writer.Update()
```
is this will work ?
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### Author:  [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [November 19, 2020, 3:58pm UTC](https://discourse.itk.org/t/save-itk-image-with-custom-voxel-spacing/3634/6 "2020-11-19T15:58:30Z")
> [@farhan\_009](#):
>
> `filter.SetUseReferenceImage(True)`
This should be false, as you are not using a reference image. The rest looks good.
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### Author:  [@dzenanz](https://discourse.itk.org/u/dzenanz)
#### Post date: [November 19, 2020, 4:00pm UTC](https://discourse.itk.org/t/save-itk-image-with-custom-voxel-spacing/3634/7 "2020-11-19T16:00:20Z")
But if you are only looking to change spacing, Pablo’s suggestion is probably simpler.
```auto
output_spacing = [0.5134, 0.5134 0.8]
image.SetSpacing(output_spacing)
itk.imwrite(image, outputFilePath)
```
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### Author:  [@farhan\_009](https://discourse.itk.org/u/farhan_009)
#### Post date: [November 20, 2020, 3:15am UTC](https://discourse.itk.org/t/save-itk-image-with-custom-voxel-spacing/3634/8 "2020-11-20T03:15:51Z")
Thank you, sir @dzenanz @phcerdan, it worked.