.. _Seg.Labeling:

Labeling
========

This algorithm is used to interactively create label maps.

Input
-----

Any type of image. Optionally, a compatible (with the same dimensions) label map can be selected to initialize the labels with.

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

To change the values in the label map, press the `Start` button from the controller and click on the 2D views. This will set the value in a sphere around the cursor.

When the adaptiveness is set to higher than 0, the intensities of the image will be taken into account, and only the voxels close in intensities to the center will be labeled. The higher the adaptiveness, the more conservative the labeling will be.

When `Avoid Other Labels` is checked, existing values in the label map will not be overwritten by different ones.

There are several shortcuts to make the process easier: the radius of the brush can be controlled with `ctrl + mouse wheel`, the current label with `alt + mouse wheel` and `ctrl + z` can be used to undo the last brush stroke.

The algorithm also has 'flood fill' mode, which can be used to fill any holes in the label map.