## Copyright (C) 2004 Josep Mones i Teixidor ## ## 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{g} = } __diagonal_fill_lut_fun__ (@var{X}) ## Calculates hit patterns for diagonal fill operation ## ## g=__diagonal_fill_lut_fun__(X) evaluates a 3-by-3 BW matrix ## neighbourhood according to rules in Pratt's book for diagonal fill ## morphological operation to create a LUT using makelut. ## ## @var{X} contains a 3-by-3 matrix to be evaluated. Returns 1 if is a ## "hit" and 0 otherwise. ## ## This function is needed by bwmorph, although it just contains the ## result matrix as a literal inside the code. ## ## This function probably never be needed by itself, but it's useful to ## know how bwmorph was coded. ## ## References: ## W. K. Pratt, "Digital Image Processing" ## @end deftypefn ## @seealso{bwmorph} ## Author: Josep Mones i Teixidor <jmones@puntbarra.com> ## Note: no intention has been made to make this quick. The only focus ## is on being clear and similar to Pratt's specification. function g=__diagonal_fill_lut_fun__(X) x=X(2,2); x0=X(2,3); x1=X(1,3); x2=X(1,2); x3=X(1,1); x4=X(2,1); x5=X(3,1); x6=X(3,2); x7=X(3,3); p4=!x&&x6&&!x7&&x0; p3=!x&&x4&&!x5&&x6; p2=!x&&x2&&!x3&&x4; p1=!x&&x0&&!x1&&x2; g=x||p1||p2||p3||p4; endfunction % % $Log$ % Revision 1.2 2007/03/23 16:14:36 adb014 % Update the FSF address % % Revision 1.1 2004/08/16 14:42:02 jmones % Functions used to code bwmorph % %

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