Convert a parcellated image (where values are node indices) into a colour image


label2colour [ options ]  nodes_in colour_out
  • nodes_in: the input node parcellation image
  • colour_out: the output colour image


Many software packages handle this colouring internally within their viewer program; this binary explicitly converts a parcellation image into a colour image that should be viewable in any software.


  • -lut file Provide the relevant colour lookup table (if not provided, nodes will be coloured randomly)

Standard options

  • -info display information messages.
  • -quiet do not display information messages or progress status.
  • -debug display debugging messages.
  • -force force overwrite of output files. Caution: Using the same file as input and output might cause unexpected behaviour.
  • -nthreads number use this number of threads in multi-threaded applications (set to 0 to disable multi-threading)
  • -failonwarn terminate program if a warning is produced
  • -help display this information page and exit.
  • -version display version information and exit.

Author: Robert E. Smith (

Copyright: Copyright (c) 2008-2017 the MRtrix3 contributors

This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, you can obtain one at

MRtrix is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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