home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Geek Gadgets 1
/
ADE-1.bin
/
ade-dist
/
octave-1.1.1p1-src.tgz
/
tar.out
/
fsf
/
octave
/
scripts
/
image
/
saveimage.m
< prev
Wrap
Text File
|
1996-09-28
|
3KB
|
99 lines
# 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 saveimage (filename, X, img_form, map)
# Save a matrix to disk in image format.
#
# saveimage (filename, x) saves matrix x to file filename in octave's
# image format. The current colormap is saved in the file also.
#
# saveimage (filename, x, "img") saves the image in the default format
# and is the same as saveimage (filename, x).
#
# saveimage (filename, x, "ppm") saves the image in ppm format instead
# of the default octave image format.
#
# saveimage (filename, x, "ps") saves the image in PostScript format
# instead of the default octave image format. (Note: images saved in
# PostScript format can not be read back into octave with loadimage.)
#
# saveimage (filename, x, format, map) saves the image along with the
# specified colormap in the specified format.
#
# Note: If the colormap contains only two entries and these entries
# are black and white, the bitmap ppm and PostScript formats are used.
# If the image is a gray scale image (the entries within each row of
# the colormap are equal) the gray scale ppm and PostScript image
# formats are used, otherwise the full color formats are used.
#
# SEE ALSO: loadimage, save, load, colormap
# Written by Tony Richardson (amr@mpl.ucsd.edu) July 1994.
if (nargin < 2 || nargin > 4)
usage ("saveimage (filename, matrix, [format, [colormap]])");
elseif (nargin == 2)
if (! isstr (filename))
error ("file name must be a string");
endif
map = colormap;
img_form = "img";
elseif (nargin == 3)
if (! isstr (img_form))
error ("image format specification must be a string");
endif
map = colormap;
endif
# XXX FIXME XXX -- we should check the remaining args.
# XXX FIXME XXX -- we should use octave_tmp_file_name here.
if (strcmp (img_form, "img") == 1)
oct_file = filename;
elseif (strcmp (img_form, "ppm") == 1)
oct_file = sprintf ("image.%s.img", num2str (fix (rand * 10000)));
ppm_file = filename;
elseif (strcmp (img_form, "ps") == 1)
oct_file = sprintf ("image.%s.img", num2str (fix (rand *10000)));
ps_file = filename;
endif
# Save image in octave image file format
eval (['save -asciii ', oct_file, ' map X']);
# Convert to another format if requested.
if (strcmp (img_form, "ppm") == 1)
octtopnm = sprintf ("octtopnm %s > %s", oct_file, filename);
rm = sprintf("rm -f %s", oct_file);
shell_cmd (octtopnm);
shell_cmd (rm);
elseif (strcmp (img_form, "ps") == 1)
octtopnm = sprintf ("octtopnm %s", oct_file);
ppmtops = sprintf ("pnmtops > %s 2> /dev/null", filename);
octtops = [ octtopnm, " | ", ppmtops ];
rm = sprintf ("rm -f %s", oct_file);
shell_cmd (octtops);
shell_cmd (rm);
endif
endfunction