# Smoothing factor?

**URL:** <https://discourse.slicer.org/t/smoothing-factor/15574>\
**Category:** Community\
**Tags:** segmentation\
**Created:** [January 18, 2021, 1:03am UTC](https://discourse.slicer.org/t/smoothing-factor/15574 "2021-01-18T01:03:42Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![slicer365](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/slicer365/32/67549_2.png) [@slicer365](https://discourse.slicer.org/u/slicer365)\
**Post date:** [January 18, 2021, 1:03am UTC](https://discourse.slicer.org/t/smoothing-factor/15574/1 "2021-01-18T01:03:42Z")

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![科研部图章](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/1/e1a13b6f113528d6e84138c4e9c887816de481cc.jpeg)  
This tool can smooth the surface of the model, but I want to know if it changes the shape of the original model, such as the accuracy of the original model. This smoothing effect can indeed export the model, not just the display effect. Sometimes In order to smooth the model, I need to use Blender. I don’t know if this function is implemented in the same principle as Blender.

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [January 18, 2021, 1:13am UTC](https://discourse.slicer.org/t/smoothing-factor/15574/2 "2021-01-18T01:13:06Z")

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To alleviate your concerns, you can turn off the smoothing during segmentation, export the final segmentation (without smoothing again) as 3D model and then use the `Surface Toolbox` to smooth the model in various amounts. Then you can use the `Model 2 Model Distance` extension to visualize and quantify the difference between your original (not smoothened model) and your smoothened ones. The difference should be very very subtle.

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [January 18, 2021, 2:58am UTC](https://discourse.slicer.org/t/smoothing-factor/15574/3 "2021-01-18T02:58:09Z")

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> [@slicer365](#):
>
> Sometimes In order to smooth the model, I need to use Blender. I don’t know if this function is implemented in the same principle as Blender

Many of the algorithms are based on the same principles but they are all different implementations. Blender is optimized for creating visually pleasing renderings, while Slicer is optimized for accurate data visualization and quantification. Therefore, in general you can expect that the two software provides slightly different results. If you create a mesh from an image and then process it in a mesh editor (Blender, MeshMixer, MeshLab, etc.), I would recommend to load back the results into Slicer to quickly verify that the edited mesh still accurately represents the source image.

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**Author:** ![slicer365](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/slicer365/32/67549_2.png) [@slicer365](https://discourse.slicer.org/u/slicer365)\
**Post date:** [January 18, 2021, 7:14am UTC](https://discourse.slicer.org/t/smoothing-factor/15574/4 "2021-01-18T07:14:14Z")

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Professors always give me a great idea, thank you very much with my poor English ! 😄

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**Author:** ![slicer365](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/slicer365/32/67549_2.png) [@slicer365](https://discourse.slicer.org/u/slicer365)\
**Post date:** [January 18, 2021, 7:15am UTC](https://discourse.slicer.org/t/smoothing-factor/15574/5 "2021-01-18T07:15:30Z")

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Thank you very much with my poor English ! 😄