Mercurial > hg > octave-nkf
annotate scripts/image/imshow.m @ 11595:5ec6aa05638d
Prevent doubled quotes around @table items in Info.
| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Thu, 20 Jan 2011 21:29:14 -0800 |
| parents | c792872f8942 |
| children | a066673566da |
| rev | line source |
|---|---|
| 11523 | 1 ## Copyright (C) 1994-2011 John W. Eaton |
|
11587
c792872f8942
all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents:
11523
diff
changeset
|
2 ## |
| 2313 | 3 ## This file is part of Octave. |
| 4 ## | |
| 5 ## Octave is free software; you can redistribute it and/or modify it | |
| 6 ## under the terms of the GNU General Public License as published by | |
| 7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
| 8 ## your option) any later version. | |
| 2313 | 9 ## |
| 10 ## Octave is distributed in the hope that it will be useful, but | |
| 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 ## General Public License for more details. | |
| 14 ## | |
| 15 ## You should have received a copy of the GNU General Public License | |
| 7016 | 16 ## along with Octave; see the file COPYING. If not, see |
| 17 ## <http://www.gnu.org/licenses/>. | |
| 1024 | 18 |
| 3381 | 19 ## -*- texinfo -*- |
|
10793
be55736a0783
Grammarcheck the documentation from m-files.
Rik <octave@nomad.inbox5.com>
parents:
10648
diff
changeset
|
20 ## @deftypefn {Function File} {} imshow (@var{im}) |
| 5934 | 21 ## @deftypefnx {Function File} {} imshow (@var{im}, @var{limits}) |
| 22 ## @deftypefnx {Function File} {} imshow (@var{im}, @var{map}) | |
| 7074 | 23 ## @deftypefnx {Function File} {} imshow (@var{rgb}, @dots{}) |
| 5934 | 24 ## @deftypefnx {Function File} {} imshow (@var{filename}) |
| 6309 | 25 ## @deftypefnx {Function File} {} imshow (@dots{}, @var{string_param1}, @var{value1}, @dots{}) |
| 6368 | 26 ## Display the image @var{im}, where @var{im} can be a 2-dimensional |
| 7074 | 27 ## (gray-scale image) or a 3-dimensional (RGB image) matrix. |
| 5934 | 28 ## |
| 29 ## If @var{limits} is a 2-element vector @code{[@var{low}, @var{high}]}, | |
| 30 ## the image is shown using a display range between @var{low} and | |
| 31 ## @var{high}. If an empty matrix is passed for @var{limits}, the | |
| 32 ## display range is computed as the range between the minimal and the | |
| 33 ## maximal value in the image. | |
| 3426 | 34 ## |
| 5934 | 35 ## If @var{map} is a valid color map, the image will be shown as an indexed |
| 36 ## image using the supplied color map. | |
| 37 ## | |
| 38 ## If a file name is given instead of an image, the file will be read and | |
| 39 ## shown. | |
| 3426 | 40 ## |
| 5934 | 41 ## If given, the parameter @var{string_param1} has value |
|
9051
1bf0ce0930be
Grammar check TexInfo in all .m files
Rik <rdrider0-list@yahoo.com>
parents:
8920
diff
changeset
|
42 ## @var{value1}. @var{string_param1} can be any of the following: |
|
11595
5ec6aa05638d
Prevent doubled quotes around @table items in Info.
Rik <octave@nomad.inbox5.com>
parents:
11587
diff
changeset
|
43 ## @table @asis |
| 6368 | 44 ## @item "displayrange" |
| 5934 | 45 ## @var{value1} is the display range as described above. |
| 46 ## @end table | |
| 5642 | 47 ## @seealso{image, imagesc, colormap, gray2ind, rgb2ind} |
| 3373 | 48 ## @end deftypefn |
| 904 | 49 |
| 7074 | 50 ## Author: Stefan van der Walt <stefan@sun.ac.za> |
| 5934 | 51 ## Author: Soren Hauberg <hauberg at gmail dot com> |
| 2312 | 52 ## Adapted-By: jwe |
| 559 | 53 |
| 7074 | 54 function h = imshow (im, varargin) |
| 559 | 55 |
| 5934 | 56 if (nargin == 0) |
| 57 print_usage (); | |
| 5318 | 58 endif |
| 59 | |
| 7328 | 60 display_range = NA; |
| 7074 | 61 true_color = false; |
| 62 indexed = false; | |
| 63 | |
| 5935 | 64 ## Get the image. |
| 5934 | 65 if (ischar (im)) |
|
7931
de26beacb20f
imread.m: simplify; loadimage.m: deprecate
John W. Eaton <jwe@octave.org>
parents:
7930
diff
changeset
|
66 [im, map] = imread (im); |
| 7074 | 67 indexed = true; |
| 68 colormap (map); | |
| 69 endif | |
| 70 | |
|
10286
8cf666139297
imshow for logical matrices
John W. Eaton <jwe@octave.org>
parents:
9273
diff
changeset
|
71 nd = ndims (im); |
|
8cf666139297
imshow for logical matrices
John W. Eaton <jwe@octave.org>
parents:
9273
diff
changeset
|
72 |
|
8cf666139297
imshow for logical matrices
John W. Eaton <jwe@octave.org>
parents:
9273
diff
changeset
|
73 if (! ((isnumeric (im) || islogical (im)) && (nd == 2 || nd == 3))) |
|
11472
1740012184f9
Use uppercase for variable names in error() strings to match Info documentation. Only m-files done.
Rik <octave@nomad.inbox5.com>
parents:
11324
diff
changeset
|
74 error ("imshow: IM must be an image or the filename of an image"); |
| 5318 | 75 endif |
| 7074 | 76 |
|
10286
8cf666139297
imshow for logical matrices
John W. Eaton <jwe@octave.org>
parents:
9273
diff
changeset
|
77 if (nd == 2) |
| 7074 | 78 if (! indexed) |
| 79 colormap (gray ()); | |
| 80 endif | |
| 81 elseif (size (im, 3) == 3) | |
| 82 if (ismember (class (im), {"uint8", "uint16", "double", "single"})) | |
| 83 true_color = true; | |
| 84 else | |
| 85 error ("imshow: color image must be uint8, uint16, double, or single"); | |
| 86 endif | |
| 87 else | |
| 88 error ("imshow: expecting MxN or MxNx3 matrix for image"); | |
| 5318 | 89 endif |
| 90 | |
| 7074 | 91 narg = 1; |
| 92 while (narg <= numel (varargin)) | |
| 93 arg = varargin{narg++}; | |
| 94 if (isnumeric (arg)) | |
| 7331 | 95 if (numel (arg) == 2 || isempty (arg)) |
|
10433
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
96 display_range = arg; |
| 7074 | 97 elseif (columns (arg) == 3) |
|
10433
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
98 indexed = true; |
|
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
99 colormap (arg); |
| 7074 | 100 elseif (! isempty (arg)) |
|
10433
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
101 error ("imshow: argument number %d is invalid", narg+1); |
| 7074 | 102 endif |
| 103 elseif (ischar (arg)) | |
| 104 switch (arg) | |
|
10433
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
105 case "displayrange"; |
|
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
106 display_range = varargin{narg++}; |
|
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
107 case {"truesize", "initialmagnification"} |
|
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
108 warning ("image: zoom argument ignored -- use GUI features"); |
|
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
109 otherwise |
|
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
110 warning ("imshow: unrecognized property %s", arg); |
|
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
111 narg++; |
| 7074 | 112 endswitch |
| 113 else | |
| 114 error ("imshow: argument number %d is invalid", narg+1); | |
| 115 endif | |
| 116 endwhile | |
| 117 | |
| 8117 | 118 ## Set default display range if display_range not set yet. |
| 7328 | 119 if (isempty (display_range)) |
| 7074 | 120 display_range = [min(im(:)), max(im(:))]; |
| 8117 | 121 elseif (isna (display_range)) |
| 7074 | 122 t = class (im); |
| 123 switch (t) | |
| 124 case {"double", "single", "logical"} | |
|
10433
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
125 display_range = [0, 1]; |
| 7074 | 126 case {"int8", "int16", "int32", "uint8", "uint16", "uint32"} |
|
10433
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
127 ## For compatibility, uint8 data should not be handled as |
|
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
128 ## double. Doing so is a quick fix to allow the images to be |
|
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
129 ## displayed correctly. |
|
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
130 display_range = double ([intmin(t), intmax(t)]); |
| 7074 | 131 otherwise |
|
10433
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
132 error ("imshow: invalid data type for image"); |
| 7074 | 133 endswitch |
| 134 endif | |
| 5934 | 135 |
| 5935 | 136 ## Check for complex images. |
| 5934 | 137 if (iscomplex (im)) |
| 138 warning ("imshow: only showing real part of complex image"); | |
| 139 im = real (im); | |
| 5318 | 140 endif |
|
11587
c792872f8942
all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents:
11523
diff
changeset
|
141 |
| 6219 | 142 nans = isnan (im(:)); |
| 143 if (any (nans)) | |
| 144 warning ("Octave:imshow-NaN", | |
|
10433
2c01d24459fb
Detabify scripts in 'scripts/image/'
Soren Hauberg <hauberg@gmail.com>
parents:
10286
diff
changeset
|
145 "imshow: pixels with NaN or NA values are set to minimum pixel value"); |
| 6219 | 146 im(nans) = display_range(1); |
| 147 endif | |
| 148 | |
| 7074 | 149 ## This is for compatibility. |
|
7930
1f6eb3de1c4e
__img__.m, imshow.m, __go_draw_axes__.m: improve handling of truecolor images
John W. Eaton <jwe@octave.org>
parents:
7511
diff
changeset
|
150 if (! (indexed || (true_color && isinteger (im))) || islogical (im)) |
| 7074 | 151 im = double (im); |
| 152 endif | |
| 153 | |
| 5934 | 154 ## Scale the image to the interval [0, 1] according to display_range. |
| 7315 | 155 if (! (true_color || indexed || islogical (im))) |
| 7328 | 156 low = display_range(1); |
| 157 high = display_range(2); | |
| 158 im = (im-low)/(high-low); | |
| 5934 | 159 im(im < 0) = 0; |
| 160 im(im > 1) = 1; | |
| 4836 | 161 endif |
| 6368 | 162 |
|
9269
06518194dba0
fix displaying indexed images
Jaroslav Hajek <highegg@gmail.com>
parents:
9245
diff
changeset
|
163 if (true_color || indexed) |
|
06518194dba0
fix displaying indexed images
Jaroslav Hajek <highegg@gmail.com>
parents:
9245
diff
changeset
|
164 tmp = image ([], [], im); |
| 5934 | 165 else |
|
10648
bc4eb29e0cb4
Scale image point color according to colormap. Bug #29926.
Rik <octave@nomad.inbox5.com>
parents:
10433
diff
changeset
|
166 tmp = image (im); |
|
bc4eb29e0cb4
Scale image point color according to colormap. Bug #29926.
Rik <octave@nomad.inbox5.com>
parents:
10433
diff
changeset
|
167 set (tmp, "cdatamapping", "scaled"); |
| 5934 | 168 endif |
| 11324 | 169 set (gca (), "visible", "off", "ydir", "reverse"); |
|
7511
f028e7aa77a7
imshow.m: use axis ("image")
John W. Eaton <jwe@octave.org>
parents:
7331
diff
changeset
|
170 axis ("image"); |
| 7074 | 171 |
| 172 if (nargout > 0) | |
| 173 h = tmp; | |
| 174 endif | |
| 175 | |
| 559 | 176 endfunction |
| 4836 | 177 |
| 178 %!error imshow () # no arguments | |
| 5934 | 179 %!error imshow ({"cell"}) # No image or filename given |
| 180 %!error imshow (ones(4,4,4)) # Too many dimensions in image | |
| 4836 | 181 |
| 182 %!demo | |
| 7074 | 183 %! imshow ("default.img"); |
| 184 | |
| 185 %!demo | |
| 186 %! imshow ("default.img"); | |
| 187 %! colormap ("autumn"); | |
| 4836 | 188 |
| 189 %!demo | |
| 9273 | 190 %! [I, M] = imread ("default.img"); |
| 5318 | 191 %! imshow (I, M); |
| 192 | |
| 193 %!demo | |
| 9273 | 194 %! [I, M] = imread ("default.img"); |
| 195 %! [R, G, B] = ind2rgb (I, M); | |
| 196 %! imshow (cat(3, R, G*0.5, B*0.8)); | |
| 5318 | 197 |
| 198 %!demo | |
| 7074 | 199 %! imshow (rand (100, 100)); |
| 200 | |
| 201 %!demo | |
| 202 %! imshow (rand (100, 100, 3)); | |
| 203 | |
| 204 %!demo | |
| 205 %! imshow (100*rand (100, 100, 3)); | |
| 206 | |
| 207 %!demo | |
| 208 %! imshow (rand (100, 100)); | |
| 209 %! colormap (jet); |