Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / image-1.0.15 / isbw.m

diff --git a/octave_packages/image-1.0.15/isbw.m b/octave_packages/image-1.0.15/isbw.m
new file mode 100644 (file)
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+++ b/octave_packages/image-1.0.15/isbw.m
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+## Copyright (C) 2000  Kai Habel
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; If not, see <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} @var{bool}= isbw (@var{BW})
+## Returns true for a black-white (binary) image.
+## All values must be either 0 or 1
+## @end deftypefn
+
+## Author:     Kai Habel <kai.habel@gmx.de>
+## Date:       20/03/2000
+
+function bool = isbw (BW)
+
+  bool = 0;    
+  if !(nargin == 1)
+    usage ("isbw(BW)");
+  endif
+
+  if !(ismatrix(BW))
+    return;
+  endif
+
+  bool = all (all ((BW == 1) + (BW == 0)));
+
+endfunction