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

Reference
Table of Contents  ▸  List of Commands  ▸  Filtering  ▸  solve_poisson◀  split_freq    |    split_alpha  ▶

solve_poisson

Arguments:

  • "laplacian_command",_nb_iterations>=0,_time_step>0,_nb_scales>=0

Description:

Solve Poisson equation so that applying laplacian[n] is close to the result of laplacian_command[n].

Solving is performed using a multi-scale gradient descent algorithm.
If nb_scales=0, the number of scales is automatically determined.

Default values:

nb_iterations=60, dt=5 and nb_scales=0.

Example of use:

image.jpg command "foo : gradient x" +solve_poisson foo +foo[0] +laplacian[1]

Command: image.jpg command "foo : gradient x" +solve_poisson foo +foo[0] +laplacian[1]
Command: image.jpg command "foo : gradient x" +solve_poisson foo +foo[0] +laplacian[1]
Command: image.jpg command "foo : gradient x" +solve_poisson foo +foo[0] +laplacian[1]
Command: image.jpg command "foo : gradient x" +solve_poisson foo +foo[0] +laplacian[1]
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.