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annotate scripts/image/ind2rgb.m @ 1356:8b51c1738882

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[project @ 1995-09-05 20:08:49 by jwe] Initial revision
author jwe
date Tue, 05 Sep 1995 20:08:49 +0000
parents 611d403c7f3d
children 5d29638dd524
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1 # Copyright (C) 1995 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 the
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7 # Free Software Foundation; either version 2, or (at your option) any
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8 # later version.
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9 #
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10 # Octave is distributed in the hope that it will be useful, but WITHOUT
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11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 # 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 02111-1307, USA.
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18
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19 function [R, G, B] = ind2rgb (X, map)
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21 # Convert an indexed image to red, green, and blue color components.
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22 #
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23 # [R G B] = ind2rgb(X) uses the current colormap for the conversion.
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24 #
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25 # [R G B] = ind2rgb(X,map) uses the specified colormap.
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26 #
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27 # SEE ALSO: rgb2ind, image, imshow, ind2gray, gray2ind.
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28
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29 # Written by Tony Richardson (amr@mpl.ucsd.edu) July 1994.
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30
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31 if (nargin < 1 || nargin > 2)
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32 usage ("ind2rgb (X, map)");
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33 elseif (nargin == 1)
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34 map = colormap ();
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35 endif
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36
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37 [hi, wi] = size (X);
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38
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39 # XXX FIXME XXX -- we should check size of X and map.
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40
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41 pref = do_fortran_indexing;
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42
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43 unwind_protect
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44
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45 do_fortran_indexing = "true";
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46
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47 R = map (X(:), 1);
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48 G = map (X(:), 2);
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49 B = map (X(:), 3);
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51 R = reshape (R, hi, wi);
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52 G = reshape (G, hi, wi);
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53 B = reshape (B, hi, wi);
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55 unwind_protect_cleanup
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56 do_fortran_indexing = pref;
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57 end_unwind_protect
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58
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59 endfunction