Hard-threshold selected images using Otsu's method.
The computed thresholds are returned as a list of values in the status.
Example of use:
G'MIC is an open-source software distributed under the
CeCILL free software licenses (LGPL-like and/or
Copyrights (C) Since July 2008,
David Tschumperlé - GREYC UMR CNRS 6072, Image Team.