Add a useful package (from Source forge) for octave

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

diff --git a/octave_packages/image-1.0.15/imclose.m b/octave_packages/image-1.0.15/imclose.m
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+## Copyright (C) 2008 Soren Hauberg
+## 
+## 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.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} @var{B} = imclose (@var{A}, @var{se})
+## Perform morphological closing on a given image.
+## The image @var{A} must be a grayscale or binary image, and @var{se} must be a
+## structuring element.
+##
+## The closing corresponds to a dilation followed by an erosion of the image, i.e.
+## @example
+## B = imerode(imdilate(A, se), se);
+## @end example
+## @seealso{imdilate, imerode, imclose}
+## @end deftypefn
+
+function retval = imclose(im, se)
+  ## Checkinput
+  if (nargin != 2)
+    print_usage();
+  endif
+  if (!ismatrix(im) || !isreal(im))
+    error("imclose: first input argument must be a real matrix");
+  endif
+  if (!ismatrix(se) || !isreal(se))
+    error("imclose: second input argument must be a real matrix");
+  endif
+  
+  ## Perform filtering
+  retval = imerode(imdilate(im, se), se);
+
+endfunction