# dimension images
**URL:** https://discourse.itk.org/t/dimension-images/1890
**Category:** Uncategorized
**Tags:** python, simpleitk
**Created:** [May 17, 2019, 10:27am UTC](https://discourse.itk.org/t/dimension-images/1890 "2019-05-17T10:27:17Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@safa](https://discourse.itk.org/u/safa)
#### Post date: [May 17, 2019, 10:27am UTC](https://discourse.itk.org/t/dimension-images/1890/1 "2019-05-17T10:27:17Z")
i can’t upload the segmentation image with the main image any solution please to match the segmentation image with the main image !!!
---
### Author:  [@zivy](https://discourse.itk.org/u/zivy)
#### Post date: [May 17, 2019, 1:12pm UTC](https://discourse.itk.org/t/dimension-images/1890/2 "2019-05-17T13:12:33Z")
Hello @safa
The error message in the screenshot clearly identifies the problem:
Image size - 512x512x216
Segmentation size - 256x256x256
The sizes are expected to match.
Is this a segmentation you created or was it done by someone else and given to you? Do the two actually occupy the same spatial region (origin, direction cosine matrix, size\*spacing)? If yes, then you can resample the segmentation onto the image and then do the overlay. If not, then you need to identify where was the error introduced.
---
### Author:  [@lassoan](https://discourse.itk.org/u/lassoan)
#### Post date: [May 18, 2019, 3:52pm UTC](https://discourse.itk.org/t/dimension-images/1890/3 "2019-05-18T15:52:20Z")
You can edit images and segmentations with arbitrary geometry in [3D Slicer](https://www.slicer.org). Resampling is performed internally as needed.