.. _Seg.LabelToMesh:

Extract Mesh
============

Runs the Marching Cubes algorithm to extract a mesh from a 3D volume or label map.

Input
-----

A 3D image of any type or a 3D label map.

Output
------

One or multiple triangular meshes.

Description
-----------

This algorithms extracts a mesh from a volume based on its intensities.

If the input volume is a regular image/not a label map use the **Iso-Value** parameter to specify the cut-off intensity between the inside and outside regions.
In this case the **Threshold Above Iso-Value** flag determines which region will be considered as the mesh interior.

Alternatively, if the input volume has the LABEL modality, you can instead specify a list of label values in the **Target Labels** parameter.
If you leave this empty the algorithm will compute one mesh for each non-background label.

With either option you can specify an optional **Smoothing** factor to avoid staircase artifacts on the resulting mesh.
This parameter describes the half-kernel size of a Gaussian Smoothing that is pre-applied to the input image before running the Marching Cubes algorithm.