/usr/share/octave/packages/image-2.2.2/private/prepare_strel.m is in octave-image 2.2.2-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | ## Copyright (C) 2013 Carnë Draug <carandraug@octave.org>
##
## 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 3 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/>.
## This function will be common to imopen, imclose, imbothat, imtophat,
## and any other function that can take a strel object or a matrix of 0
## and 1. It checks the input and gets a strel object in the later case.
function se = prepare_strel (func, se)
## We could do a lot more of input checking but it'd be repeated again
## in imerode and imdilate. We just do the minimum for strel as well.
## Since imerode and imdilate will create a strel object out of the SE
## we pass them, we can create it now ourselves.
if (! strcmpi (class (se), "strel"))
if (! ismatrix (se) || any (se(:) == 1 & se(:) == 0))
error ("%s: SE must be a strel object or matrix of 0 and 1", func);
endif
se = strel ("arbitrary", se);
endif
endfunction
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