G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing
Banner Institutions GREYC CNRS ENSICAEN UNICAEN

A Full-Featured Open-Source Framework for Image Processing

Latest stable version: 3.5.5        Current pre-release: 3.6.0 (2025/08/04)

Reference
Table of Contents  ▸  List of Commands  ▸  Colors  ▸  compose_channels◀  colormap    |    count_colors  ▶

compose_channels

Arguments:

  • _operator

Description:

Compose all channels of each selected image, using specified arithmetic operator (+,-,or,min,...).

Default values:

operator=+.

This command has a tutorial page.

Example of use:

image.jpg +compose_channels and

Command: image.jpg +compose_channels and
Command: image.jpg +compose_channels and
G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing

G'MIC is an open-source software distributed under the CeCILL free software licenses (LGPL-like and/or
GPL-compatible). Copyrights (C) Since July 2008, David Tschumperlé - GREYC UMR CNRS 6072, Image Team.