# Scale factor while exporting segmentation

**URL:** <https://discourse.slicer.org/t/scale-factor-while-exporting-segmentation/3085>\
**Category:** Development\
**Created:** [June 6, 2018, 6:48am UTC](https://discourse.slicer.org/t/scale-factor-while-exporting-segmentation/3085 "2018-06-06T06:48:44Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![anandmulay3](https://avatars.discourse-cdn.com/v4/letter/a/ac8455/32.png) [@anandmulay3](https://discourse.slicer.org/u/anandmulay3)\
**Post date:** [June 6, 2018, 6:48am UTC](https://discourse.slicer.org/t/scale-factor-while-exporting-segmentation/3085/1 "2018-06-06T06:48:44Z")

</div>

can we set the scale factor of the 3D model while exporting segmentation.or do we have the scaling information in export segmentation method?

Thanks.

---

<div class="post-metadata">

**Author:** ![timeanddoctor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/timeanddoctor/32/5839_2.png) [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Post date:** [June 6, 2018, 11:43am UTC](https://discourse.slicer.org/t/scale-factor-while-exporting-segmentation/3085/2 "2018-06-06T11:43:23Z")

</div>

I think it is simple by some other softwares which could open stl file, such as CURA, blender…

---

<div class="post-metadata">

**Author:** ![anandmulay3](https://avatars.discourse-cdn.com/v4/letter/a/ac8455/32.png) [@anandmulay3](https://discourse.slicer.org/u/anandmulay3)\
**Post date:** [June 6, 2018, 12:44pm UTC](https://discourse.slicer.org/t/scale-factor-while-exporting-segmentation/3085/3 "2018-06-06T12:44:59Z")

</div>

yeah, but i want it in my scriptable module. so if slicer itself write the .obj file in that scale it will be helpful

---

<div class="post-metadata">

**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:** [June 6, 2018, 9:42pm UTC](https://discourse.slicer.org/t/scale-factor-while-exporting-segmentation/3085/4 "2018-06-06T21:42:11Z")

</div>

Yes, it is sometimes useful to be able to apply scale on export (for example, some non-medical-imaging people use meters as units in their model files). I’ve added a size scale field to the file export options and in the segmentations module logic (in r27236), it’ll be available in tomorrow’s nightly build.