# Valid ROI for 2D image

**URL:** <https://discourse.slicer.org/t/valid-roi-for-2d-image/29094>\
**Category:** Radiomics\
**Tags:** python\
**Created:** [April 24, 2023, 5:47pm UTC](https://discourse.slicer.org/t/valid-roi-for-2d-image/29094 "2023-04-24T17:47:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Maka\_Paka](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/maka_paka/32/65745_2.png) [@Maka\_Paka](https://discourse.slicer.org/u/Maka_Paka)\
**Post date:** [April 24, 2023, 5:47pm UTC](https://discourse.slicer.org/t/valid-roi-for-2d-image/29094/1 "2023-04-24T17:47:12Z")

</div>

Hello team, I have a problem with loading 2D .jpg image and automatically segmented 2D .png skin lesion mask using AI. Size of the image is (128, 128, 3) and mask is (128, 128, 1) but during extractor.execute I have following error:

 ![Screenshot 2023-04-24 194113](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/b/e/be6dbc4504030ad4ebba68de80c2afd70794eb3f.png)  
What can I do and is using 3D slicer necessary?