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annotate scripts/image/ind2rgb.m @ 3202:44d82b369c78

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[project @ 1998-10-29 20:27:57 by jwe]
author jwe
date Thu, 29 Oct 1998 20:28:02 +0000
parents 8b262e771614
children 36405da8e173
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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, 59 Temple Place - Suite 330, Boston, MA
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18 ## 02111-1307, USA.
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20 ## Convert an indexed image to red, green, and blue color components.
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21 ##
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22 ## [R G B] = ind2rgb(X) uses the current colormap for the conversion.
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23 ##
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24 ## [R G B] = ind2rgb(X,map) uses the specified colormap.
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25 ##
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26 ## SEE ALSO: rgb2ind, image, imshow, ind2gray, 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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39
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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 pref = do_fortran_indexing;
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46 unwind_protect
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48 do_fortran_indexing = 1;
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49
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50 R = map (X(:), 1);
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51 G = map (X(:), 2);
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52 B = map (X(:), 3);
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53
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54 R = reshape (R, hi, wi);
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55 G = reshape (G, hi, wi);
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56 B = reshape (B, hi, wi);
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58 unwind_protect_cleanup
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59 do_fortran_indexing = pref;
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60 end_unwind_protect
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61
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62 endfunction