# Output multiple labelmap for multi-class segmentation

**URL:** <https://discourse.slicer.org/t/output-multiple-labelmap-for-multi-class-segmentation/26357>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [November 21, 2022, 8:29pm UTC](https://discourse.slicer.org/t/output-multiple-labelmap-for-multi-class-segmentation/26357 "2022-11-21T20:29:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Dolzodmaa\_D](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/dolzodmaa_d/32/14142_2.png) [@Dolzodmaa\_D](https://discourse.slicer.org/u/Dolzodmaa_D)\
**Post date:** [November 21, 2022, 8:29pm UTC](https://discourse.slicer.org/t/output-multiple-labelmap-for-multi-class-segmentation/26357/1 "2022-11-21T20:29:58Z")

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How can I save the binary label maps for each class I segmented? Or is it possible to output multi-color segmentation label map?

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<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:** [December 1, 2022, 6:36am UTC](https://discourse.slicer.org/t/output-multiple-labelmap-for-multi-class-segmentation/26357/2 "2022-12-01T06:36:32Z")

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By default (if segments don’t overlap) the segmentation that you save (.seg.nrrd file) is a multi-color segmentation label map.

If you want to have each segment in a separate volume then you can show one segment at a time and use “Export to files…” feature in Segmentations module with the “Visible segments only” option enabled.

You can also use [slicerio](https://github.com/lassoan/slicerio) Python package to load a .seg.nrrd in any Python environment, get the list of segments and any segment or combination of segments as numpy arrays.