2847
|
1 ## Copyright (C) 1996, 1997 John W. Eaton |
2313
|
2 ## |
|
3 ## This file is part of Octave. |
|
4 ## |
|
5 ## Octave is free software; you can redistribute it and/or modify it |
|
6 ## under the terms of the GNU General Public License as published by |
|
7 ## the Free Software Foundation; either version 2, or (at your option) |
|
8 ## any later version. |
|
9 ## |
|
10 ## Octave is distributed in the hope that it will be useful, but |
|
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
|
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
13 ## General Public License for more details. |
|
14 ## |
|
15 ## You should have received a copy of the GNU General Public License |
|
16 ## along with Octave; see the file COPYING. If not, write to the Free |
5307
|
17 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
|
18 ## 02110-1301, USA. |
1024
|
19 |
3381
|
20 ## -*- texinfo -*- |
3373
|
21 ## @deftypefn {Function File} {[@var{r}, @var{g}, @var{b}] =} ind2rgb (@var{x}, @var{map}) |
2311
|
22 ## Convert an indexed image to red, green, and blue color components. |
3373
|
23 ## If @var{map} is omitted, the current colormap is used for the conversion. |
5642
|
24 ## @seealso{rgb2ind, image, imshow, ind2gray, gray2ind} |
3373
|
25 ## @end deftypefn |
904
|
26 |
3202
|
27 ## Author: Tony Richardson <arichard@stark.cc.oh.us> |
2312
|
28 ## Created: July 1994 |
|
29 ## Adapted-By: jwe |
559
|
30 |
2312
|
31 function [R, G, B] = ind2rgb (X, map) |
1024
|
32 |
|
33 if (nargin < 1 || nargin > 2) |
6046
|
34 print_usage (); |
1024
|
35 elseif (nargin == 1) |
|
36 map = colormap (); |
559
|
37 endif |
|
38 |
1024
|
39 [hi, wi] = size (X); |
|
40 |
5775
|
41 ## FIXME -- we should check size of X and map. |
559
|
42 |
3486
|
43 R = reshape (map (X(:), 1), hi, wi); |
|
44 G = reshape (map (X(:), 2), hi, wi); |
|
45 B = reshape (map (X(:), 3), hi, wi); |
559
|
46 |
|
47 endfunction |