/usr/share/octave/packages/image-2.2.2/roicolor.m is in octave-image 2.2.2-1.
This file is owned by root:root, with mode 0o644.
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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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | ## Copyright (C) 2004 Josep Mones i Teixidor <jmones@puntbarra.com>
##
## 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/>.
## -*- texinfo -*-
## @deftypefn {Function File} {@var{BW} =} roicolor (@var{A}, @var{low}, @var{high})
## @deftypefnx {Function File} {@var{BW} = } roicolor (@var{A},@var{v})
## Select a Region Of Interest of an image based on color.
##
## BW = roicolor(A,low,high) selects a region of interest (ROI) of an
## image @var{A} returning a black and white image in a logical array (1 for
## pixels inside ROI and 0 outside ROI), which is formed by all pixels
## whose values lie within the colormap range specified by [@var{low}
## @var{high}].
##
## BW = roicolor(A,v) selects a region of interest (ROI) formed by all
## pixels that match values in @var{v}.
## @end deftypefn
function BW = roicolor (A, p1, p2)
if (nargin < 2 || nargin > 3)
print_usage;
endif
if (nargin == 2)
if (!isvector(p1))
error("BW = roicolor(A, v): v should be a vector.");
endif
BW=logical(zeros(size(A)));
for c=p1
BW|=(A==c);
endfor
elseif (nargin==3)
if (!isscalar(p1) || !isscalar(p2))
error("BW = roicolor(A, low, high): low and high must be scalars.");
endif
BW=logical((A>=p1)&(A<=p2));
endif
endfunction
%!demo
%! roicolor([1:10],2,4);
%! % Returns '1' where input values are between 2 and 4 (both included).
%!assert(roicolor([1:10],2,4),logical([0,1,1,1,zeros(1,6)]));
%!assert(roicolor([1,2;3,4],3,3),logical([0,0;1,0]));
%!assert(roicolor([1,2;3,4],[1,4]),logical([1,0;0,1]));
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