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annotate scripts/image/ind2rgb.m @ 5307:4c8a2e4e0717

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[project @ 2005-04-26 19:24:27 by jwe]
author jwe
date Tue, 26 Apr 2005 19:24:47 +0000
parents c08cb1098afc
children 2618a0750ae6
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1 ## Copyright (C) 1996, 1997 John W. Eaton
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 2, or (at your option)
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8 ## any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, write to the Free
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17 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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18 ## 02110-1301, USA.
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20 ## -*- texinfo -*-
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21 ## @deftypefn {Function File} {[@var{r}, @var{g}, @var{b}] =} ind2rgb (@var{x}, @var{map})
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22 ## Convert an indexed image to red, green, and blue color components.
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23 ## If @var{map} is omitted, the current colormap is used for the conversion.
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24 ## @end deftypefn
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25 ##
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26 ## @seealso{rgb2ind, image, imshow, ind2gray, and gray2ind}
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28 ## Author: Tony Richardson <arichard@stark.cc.oh.us>
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29 ## Created: July 1994
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30 ## Adapted-By: jwe
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32 function [R, G, B] = ind2rgb (X, map)
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34 if (nargin < 1 || nargin > 2)
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35 usage ("ind2rgb (X, map)");
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36 elseif (nargin == 1)
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37 map = colormap ();
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38 endif
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40 [hi, wi] = size (X);
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41
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42 ## XXX FIXME XXX -- we should check size of X and map.
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44 R = reshape (map (X(:), 1), hi, wi);
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45 G = reshape (map (X(:), 2), hi, wi);
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46 B = reshape (map (X(:), 3), hi, wi);
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48 endfunction