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gradient_norm

Arguments:

• _scheme,_boundary_conditions    or
• (no arg)

Description:

Compute the gradient norm of selected images.

scheme can be { -1:Backward | 0:Centered | 1:Forward | 2:Sobel | 3:Rotation-invariant (default) | 4:Deriche | 5:Vanvliet | 6:FB-Maxabs }.
boundary_conditions can be { 0:Dirichlet | 1:Neumann | 2:Periodic | 3:Mirror }.

Default values:

scheme=0 and boundary_conditions=1.

This command has a tutorial page.

Example of use:

Command: image.jpg gradient_norm equalize

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.