Mercurial > hg > octave-nkf

annotate scripts/image/imwrite.m @ 17853:aacb9da13df6

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
imwrite: implement LoopCount option. * __magick_read__.cc (F__magick_write__): set animationIterations() when writing an image to implement the LoopCount option. * private/__imwrite__.m: input check for the new option LoopCount and set its default. Also fix bug that was using varargin rather than the param/key cell to print error message on unknown option. * imwrite.m: document new option and its problems.
author Carnë Draug <carandraug@octave.org>
date Tue, 05 Nov 2013 05:05:11 +0000
parents d63878346099
children adb0ba0d0c13
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
17744
d63878346099 maint: Update copyright notices for release.
John W. Eaton <jwe@octave.org>
parents: 17338
diff changeset
1 ## Copyright (C) 2008-2013 John W. Eaton
16948
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
2 ## Copyright (C) 2013 Carnë Draug
7987
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
3 ##
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
4 ## This file is part of Octave.
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
5 ##
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
6 ## Octave is free software; you can redistribute it and/or modify it
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
7 ## under the terms of the GNU General Public License as published by
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
8 ## the Free Software Foundation; either version 3 of the License, or (at
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
9 ## your option) any later version.
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
10 ##
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
11 ## Octave is distributed in the hope that it will be useful, but
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
12 ## WITHOUT ANY WARRANTY; without even the implied warranty of
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
14 ## General Public License for more details.
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
15 ##
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
16 ## You should have received a copy of the GNU General Public License
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
17 ## along with Octave; see the file COPYING. If not, see
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
18 ## <http://www.gnu.org/licenses/>.
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
19
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
20 ## -*- texinfo -*-
10891
ff94219746bd imwrite.m: Allow writing of 1-bit (B&W) images.
Rik <octave@nomad.inbox5.com>
parents: 10793
diff changeset
21 ## @deftypefn {Function File} {} imwrite (@var{img}, @var{filename})
16944
1b3b3ee88284 Add optional extension argument to image IO functions.
Carnë Draug <carandraug@octave.org>
parents: 16916
diff changeset
22 ## @deftypefnx {Function File} {} imwrite (@var{img}, @var{filename}, @var{ext})
16988
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
23 ## @deftypefnx {Function File} {} imwrite (@var{img}, @var{map}, @var{filename})
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
24 ## @deftypefnx {Function File} {} imwrite (@dots{}, @var{param1}, @var{val1}, @dots{})
7987
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
25 ## Write images in various file formats.
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
26 ##
17170
d6499c14021c doc: Periodic grammarcheck of documentation.
Rik <rik@octave.org>
parents: 17086
diff changeset
27 ## The image @var{img} can be a binary, grayscale, RGB, or multi-dimensional
16988
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
28 ## image. The size and class of @var{img} should be the same as what should
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
29 ## be expected when reading it with @code{imread}: the 3rd and 4th dimensions
17171
c3bd7314643c doc: Periodic spellcheck of documentation.
Rik <rik@octave.org>
parents: 17170
diff changeset
30 ## reserved for color space, and multiple pages respectively. If it's an
16988
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
31 ## indexed image, the colormap @var{map} must also be specified.
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
32 ##
16944
1b3b3ee88284 Add optional extension argument to image IO functions.
Carnë Draug <carandraug@octave.org>
parents: 16916
diff changeset
33 ## If @var{ext} is not supplied, the file extension of @var{filename} is used
1b3b3ee88284 Add optional extension argument to image IO functions.
Carnë Draug <carandraug@octave.org>
parents: 16916
diff changeset
34 ## to determine the format. The actual supported formats are dependent on
1b3b3ee88284 Add optional extension argument to image IO functions.
Carnë Draug <carandraug@octave.org>
parents: 16916
diff changeset
35 ## options made during the build of Octave. Use @code{imformats} to check
1b3b3ee88284 Add optional extension argument to image IO functions.
Carnë Draug <carandraug@octave.org>
parents: 16916
diff changeset
36 ## the support of the different image formats.
7987
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
37 ##
16988
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
38 ## Depending on the file format, it is possible to configure the writing
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
39 ## of images with @var{param}, @var{val} pairs. The following options
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
40 ## are supported:
8148
213dd524f96b Improve documentation for image I/O.
sh@sh-laptop
parents: 8054
diff changeset
41 ##
213dd524f96b Improve documentation for image I/O.
sh@sh-laptop
parents: 8054
diff changeset
42 ## @table @samp
17332
eb7e9a991ffb Implement writing of CMYK and fix writing of image alpha channel (bug #32986).
Carnë Draug <carandraug@octave.org>
parents: 17281
diff changeset
43 ## @item Alpha
eb7e9a991ffb Implement writing of CMYK and fix writing of image alpha channel (bug #32986).
Carnë Draug <carandraug@octave.org>
parents: 17281
diff changeset
44 ## Alpha (transparency) channel for the image. This must be a matrix with
eb7e9a991ffb Implement writing of CMYK and fix writing of image alpha channel (bug #32986).
Carnë Draug <carandraug@octave.org>
parents: 17281
diff changeset
45 ## same class, and number of rows and columns of @var{img}. In case of a
eb7e9a991ffb Implement writing of CMYK and fix writing of image alpha channel (bug #32986).
Carnë Draug <carandraug@octave.org>
parents: 17281
diff changeset
46 ## multipage image, the size of the 4th dimension must also match and the third
eb7e9a991ffb Implement writing of CMYK and fix writing of image alpha channel (bug #32986).
Carnë Draug <carandraug@octave.org>
parents: 17281
diff changeset
47 ## dimension must be a singleton. By default, image will be completely
eb7e9a991ffb Implement writing of CMYK and fix writing of image alpha channel (bug #32986).
Carnë Draug <carandraug@octave.org>
parents: 17281
diff changeset
48 ## opaque.
eb7e9a991ffb Implement writing of CMYK and fix writing of image alpha channel (bug #32986).
Carnë Draug <carandraug@octave.org>
parents: 17281
diff changeset
49 ##
17853
aacb9da13df6 imwrite: implement LoopCount option.
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
50 ## @item LoopCount
aacb9da13df6 imwrite: implement LoopCount option.
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
51 ## For formats that accept animations (such as GIF), controls how many times
aacb9da13df6 imwrite: implement LoopCount option.
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
52 ## the sequence is repeated. A value of Inf means an infinite loop (default),
aacb9da13df6 imwrite: implement LoopCount option.
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
53 ## a value of 0 or 1 that the sequence is played only once (loops zero times),
aacb9da13df6 imwrite: implement LoopCount option.
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
54 ## while a value of 2 or above loops that number of times (looping twice means
aacb9da13df6 imwrite: implement LoopCount option.
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
55 ## it plays the complete sequence 3 times). This option is ignored when there
aacb9da13df6 imwrite: implement LoopCount option.
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
56 ## is only a single image at the end of writing the file.
aacb9da13df6 imwrite: implement LoopCount option.
Carnë Draug <carandraug@octave.org>
parents: 17744
diff changeset
57 ##
8148
213dd524f96b Improve documentation for image I/O.
sh@sh-laptop
parents: 8054
diff changeset
58 ## @item Quality
10891
ff94219746bd imwrite.m: Allow writing of 1-bit (B&W) images.
Rik <octave@nomad.inbox5.com>
parents: 10793
diff changeset
59 ## Set the quality of the compression. The value should be an
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
60 ## integer between 0 and 100, with larger values indicating higher visual
17170
d6499c14021c doc: Periodic grammarcheck of documentation.
Rik <rik@octave.org>
parents: 17086
diff changeset
61 ## quality and lower compression. Defaults to 75.
16988
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
62 ##
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
63 ## @item WriteMode
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
64 ## Some file formats, such as TIFF and GIF, are able to store multiple
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
65 ## images in a single file. This option specifies if @var{img} should be
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
66 ## appended to the file (if it exists) or if a new file should be created
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
67 ## for it (possibly overwriting an existing file). The value should be
17281
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 17267
diff changeset
68 ## the string @qcode{"Overwrite"} (default), or @qcode{"Append"}.
16988
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
69 ##
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
70 ## Despite this option, the most efficient method of writing a multipage
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
71 ## image is to pass a 4 dimensional @var{img} to @code{imwrite}, the
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
72 ## same matrix that could be expected when using @code{imread} with the
17281
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 17267
diff changeset
73 ## option @qcode{"Index"} set to @qcode{"all"}.
16988
54b75bed4bc7 imwrite: implement WriteMode option.
Carnë Draug <carandraug@octave.org>
parents: 16948
diff changeset
74 ##
8148
213dd524f96b Improve documentation for image I/O.
sh@sh-laptop
parents: 8054
diff changeset
75 ## @end table
213dd524f96b Improve documentation for image I/O.
sh@sh-laptop
parents: 8054
diff changeset
76 ##
16944
1b3b3ee88284 Add optional extension argument to image IO functions.
Carnë Draug <carandraug@octave.org>
parents: 16916
diff changeset
77 ## @seealso{imread, imfinfo, imformats}
7987
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
78 ## @end deftypefn
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
79
16916
59f575e504dc Connect imwrite with imformats.
Carnë Draug <carandraug@octave.org>
parents: 15714
diff changeset
80 function imwrite (varargin)
59f575e504dc Connect imwrite with imformats.
Carnë Draug <carandraug@octave.org>
parents: 15714
diff changeset
81 if (nargin < 2)
10891
ff94219746bd imwrite.m: Allow writing of 1-bit (B&W) images.
Rik <octave@nomad.inbox5.com>
parents: 10793
diff changeset
82 print_usage ();
ff94219746bd imwrite.m: Allow writing of 1-bit (B&W) images.
Rik <octave@nomad.inbox5.com>
parents: 10793
diff changeset
83 endif
16948
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
84 [filename, ext] = imwrite_filename (varargin{2:end});
10891
ff94219746bd imwrite.m: Allow writing of 1-bit (B&W) images.
Rik <octave@nomad.inbox5.com>
parents: 10793
diff changeset
85
16948
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
86 fmt = imformats (ext);
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
87 ## When there is no match, fmt will be a 1x1 structure with
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
88 ## no fields, so we can't just use `isempty (fmt)'.
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
89 if (isempty (fieldnames (fmt)))
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
90 if (isempty (ext))
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
91 error ("imwrite: no extension found for %s to identify the image format",
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
92 filename);
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
93 endif
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
94 warning ("imwrite: unlisted image format %s (see imformats). Trying to save anyway.",
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
95 ext);
17086
3db796f89695 Rename private core_imfnc functions to follow the __fnc__ convention style.
Carnë Draug <carandraug@octave.org>
parents: 16988
diff changeset
96 __imwrite__ (varargin{:});
7987
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
97 else
16948
ee2166121a28 imwrite: clean up finding of filename and its connection to imformats.
Carnë Draug <carandraug@octave.org>
parents: 16944
diff changeset
98 fmt.write (varargin{:});
16944
1b3b3ee88284 Add optional extension argument to image IO functions.
Carnë Draug <carandraug@octave.org>
parents: 16916
diff changeset
99 endif
7987
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
100
4a423a042971 add imwrite.m
John W. Eaton <jwe@octave.org>
parents:
diff changeset
101 endfunction
10891
ff94219746bd imwrite.m: Allow writing of 1-bit (B&W) images.
Rik <octave@nomad.inbox5.com>
parents: 10793
diff changeset
102
17338
1c89599167a6 maint: End m-files with 1 blank line.
Rik <rik@octave.org>
parents: 17332
diff changeset
103
10891
ff94219746bd imwrite.m: Allow writing of 1-bit (B&W) images.
Rik <octave@nomad.inbox5.com>
parents: 10793
diff changeset
104 %% Test input validation
14363
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
105 %!error imwrite () # Wrong # of args
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
106 %!error imwrite (1) # Wrong # of args
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
107 %!error imwrite ({"cell"}, "filename.jpg") # Wrong class for img
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
108 %!error imwrite (1, [], "filename.jpg") # Empty image map
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
109 %!error imwrite (1, 2, 3) # No filename specified
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
110 %!error imwrite (1, "filename") # No fmt specified
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
111 %!error imwrite (1, "filename", "junk") # Invalid fmt specified
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
112 %!error imwrite ([], "filename.jpg") # Empty img matrix
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
113 %!error imwrite (spones (2), "filename.jpg") # Invalid sparse img
10891
ff94219746bd imwrite.m: Allow writing of 1-bit (B&W) images.
Rik <octave@nomad.inbox5.com>
parents: 10793
diff changeset
114
17267
27800ef1f7d2 imwrite: add simple test for actual successfully writing
Carnë Draug <carandraug@octave.org>
parents: 17171
diff changeset
115 %!testif HAVE_MAGICK
27800ef1f7d2 imwrite: add simple test for actual successfully writing
Carnë Draug <carandraug@octave.org>
parents: 17171
diff changeset
116 %! imw = randi (255, 100, "uint8");
27800ef1f7d2 imwrite: add simple test for actual successfully writing
Carnë Draug <carandraug@octave.org>
parents: 17171
diff changeset
117 %! filename = [tmpnam() ".png"];
27800ef1f7d2 imwrite: add simple test for actual successfully writing
Carnë Draug <carandraug@octave.org>
parents: 17171
diff changeset
118 %! unwind_protect
27800ef1f7d2 imwrite: add simple test for actual successfully writing
Carnë Draug <carandraug@octave.org>
parents: 17171
diff changeset
119 %! imwrite (imw, filename);
27800ef1f7d2 imwrite: add simple test for actual successfully writing
Carnë Draug <carandraug@octave.org>
parents: 17171
diff changeset
120 %! imr = imread (filename);
27800ef1f7d2 imwrite: add simple test for actual successfully writing
Carnë Draug <carandraug@octave.org>
parents: 17171
diff changeset
121 %! unwind_protect_cleanup
27800ef1f7d2 imwrite: add simple test for actual successfully writing
Carnë Draug <carandraug@octave.org>
parents: 17171
diff changeset
122 %! unlink (filename);
27800ef1f7d2 imwrite: add simple test for actual successfully writing
Carnë Draug <carandraug@octave.org>
parents: 17171
diff changeset
123 %! end_unwind_protect
27800ef1f7d2 imwrite: add simple test for actual successfully writing
Carnë Draug <carandraug@octave.org>
parents: 17171
diff changeset
124 %! assert (imw, imr)
17338
1c89599167a6 maint: End m-files with 1 blank line.
Rik <rik@octave.org>
parents: 17332
diff changeset
125