G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing
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A Full-Featured Open-Source Framework for Image Processing

Latest stable version: 3.6.1 (2025/08/26)

Reference
Table of Contents  ▸  List of Commands  ▸  Mathematical Operators  ▸  mmul◀  mod    |    mul  ▶

mmul

Built-in command

Arguments:

  • value[%]    or
  • [image]    or
  • 'formula'    or
  • (no arg)

Description:

Compute the matrix right multiplication of selected matrices/vectors by specified value, image or mathematical expression, or compute the matrix right multiplication of selected images.

If the right-hand side image is vector-valued, this command multiplies each vector-valued pixels by the specified left-hand matrix.

(equivalent to shortcut command m*).

Examples of use:

• Example #1

(0,1,0;0,0,1;1,0,0) (1;2;3) +mmul

Command: (0,1,0;0,0,1;1,0,0) (1;2;3) +mmul
Command: (0,1,0;0,0,1;1,0,0) (1;2;3) +mmul
Command: (0,1,0;0,0,1;1,0,0) (1;2;3) +mmul

• Example #2

(0,1,0;0,0,1;1,0,0) image.jpg +mmul

Command: (0,1,0;0,0,1;1,0,0) image.jpg +mmul
Command: (0,1,0;0,0,1;1,0,0) image.jpg +mmul
Command: (0,1,0;0,0,1;1,0,0) image.jpg +mmul
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.