# What smoothing is applied to segmentations before STL export?

**URL:** https://discourse.slicer.org/t/what-smoothing-is-applied-to-segmentations-before-stl-export/41743
**Category:** Support
**Created:** [February 17, 2025, 2:41pm UTC](https://discourse.slicer.org/t/what-smoothing-is-applied-to-segmentations-before-stl-export/41743 "2025-02-17T14:41:59Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)
#### Post date: [February 19, 2025, 10:01am UTC](https://discourse.slicer.org/t/what-smoothing-is-applied-to-segmentations-before-stl-export/41743/4 "2025-02-19T10:01:51Z")

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I understand, sorry that you spent so much time searching, with no avail. I found this topic which talks about this:

> [@Turn off all smoothing in segmentation](https://discourse.slicer.org/t/turn-off-all-smoothing-in-segmentation/1933):
>
> O.S. Win 10 - 64bit Version: 4.8.1 Hi there, We are willing to apply this software to segment the thalamus and need to correct segmentation errors on a pixel-by-pixel basis. For this reason, we need to abolish any possible type of smoothing on the source image. Is that by any means possible? With very best wishes and many thanks in advance, Leonardo

Also either the paper or the thesis will have detailed information about the smoothing applied during conversion:

Pinter, C., Lasso, A., & Fichtinger, G. (2019). Polymorph segmentation representation for medical image computing. Computer Methods and Programs in Biomedicine, 171, 19–26. [Redirecting](https://doi.org/10.1016/j.cmpb.2019.02.011)  
([https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Pinter2019\_Manuscript.pdf](https://labs.cs.queensu.ca/perklab/wp-content/uploads/sites/3/2024/02/Pinter2019_Manuscript.pdf))

> **[Dynamic Representation of Anatomical Structures in Radiation Therapy...](https://qspace.library.queensu.ca/handle/1974/26422)**
>
> Segmentation is a ubiquitous operation in radiation therapy (RT) and in medical image computing (MIC) in general. Various data representations can describe segmentation results, such as binary volumes or surface models. Conversions between them are...

Let us know if you still haven’t found the answer you’re looking for.

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