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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 image (x, zoom)
-
- # Display an octave image matrix.
- #
- # image (x) displays a matrix as a color image. The elements of x are
- # indices into the current colormap and should have values between 1
- # and the length of the colormap.
- #
- # image (x, zoom) changes the zoom factor. The default value is 4.
- #
- # SEE ALSO: imshow, imagesc, colormap.
-
- # Written by Tony Richardson (amr@mpl.ucsd.edu) July 1994.
-
- if (nargin == 0)
- # Load Bobbie Jo Richardson (Born 3/16/94)
- x = loadimage ("default.img");
- zoom = 2;
- elseif (nargin == 1)
- zoom = 4;
- elseif (nargin > 2)
- usage ("image (matrix, [zoom])");
- endif
-
- # XXX FIXME XXX -- we should use octave_tmp_file_name.
-
- rnd_str = num2str (fix (rand * 10000));
- ppm_name = ["image.", rnd_str, ".ppm" ];
-
- saveimage (ppm_name, x, "ppm");
-
- # Start the viewer. Try xv, then xloadimage.
-
- xv = sprintf ("xv -expand %f %s", zoom, ppm_name);
- xloadimage = sprintf ("xloadimage -zoom %f %s", zoom*100, ppm_name);
- rm = sprintf ("rm -f %s", ppm_name);
-
- command = sprintf ("( %s || %s && %s ) > /dev/null 2>&1 &", ...
- xv, xloadimage, rm);
-
- system (command);
-
- endfunction
-