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- # Copyright (C) 1995 John W. Eaton
- #
- # This file is part of Octave.
- #
- # Octave 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 2, or (at your option) any
- # later version.
- #
- # Octave 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 Octave; see the file COPYING. If not, write to the Free
- # Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- function [R, G, B] = ind2rgb (X, map)
-
- # Convert an indexed image to red, green, and blue color components.
- #
- # [R G B] = ind2rgb(X) uses the current colormap for the conversion.
- #
- # [R G B] = ind2rgb(X,map) uses the specified colormap.
- #
- # SEE ALSO: rgb2ind, image, imshow, ind2gray, gray2ind.
-
- # Written by Tony Richardson (amr@mpl.ucsd.edu) July 1994.
-
- if (nargin < 1 || nargin > 2)
- usage ("ind2rgb (X, map)");
- elseif (nargin == 1)
- map = colormap ();
- endif
-
- [hi, wi] = size (X);
-
- # XXX FIXME XXX -- we should check size of X and map.
-
- pref = do_fortran_indexing;
-
- unwind_protect
-
- do_fortran_indexing = "true";
-
- R = map (X(:), 1);
- G = map (X(:), 2);
- B = map (X(:), 3);
-
- R = reshape (R, hi, wi);
- G = reshape (G, hi, wi);
- B = reshape (B, hi, wi);
-
- unwind_protect_cleanup
- do_fortran_indexing = pref;
- end_unwind_protect
-
- endfunction
-