Mercurial > octave-antonio
annotate scripts/image/ind2rgb.m @ 13279:984359717d71
Use common code idiom for checking whether a double value is an integer.
* num2str.m, rotdim.m, get_first_help_sentence.m, ind2rgb.m,
commutation_matrix.m, figure.m, legend.m, polyfit.m, bartlett.m, blackman.m,
detrend.m, hamming.m, hanning.m, factorial.m, mode.m, skewness.m, statistics.m,
mcnemar_test.m: Use idiom 'x == fix (x)' to test for integerness.
| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Wed, 05 Oct 2011 13:10:10 -0700 |
| parents | c792872f8942 |
| children | 72c96de7a403 |
| rev | line source |
|---|---|
| 11523 | 1 ## Copyright (C) 1994-2011 John W. Eaton |
| 2313 | 2 ## |
| 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:
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diff
changeset
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20 ## @deftypefn {Function File} {@var{rgb} =} ind2rgb (@var{x}, @var{map}) |
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11469
c776f063fefe
Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
10793
diff
changeset
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21 ## @deftypefnx {Function File} {[@var{R}, @var{R}, @var{R}] =} ind2rgb (@var{x}, @var{map}) |
| 2311 | 22 ## Convert an indexed image to red, green, and blue color components. |
| 6247 | 23 ## If the colormap doesn't contain enough colors, pad it with the |
| 24 ## last color in the map. | |
| 3373 | 25 ## If @var{map} is omitted, the current colormap is used for the conversion. |
| 5642 | 26 ## @seealso{rgb2ind, image, imshow, ind2gray, gray2ind} |
| 3373 | 27 ## @end deftypefn |
| 904 | 28 |
| 3202 | 29 ## Author: Tony Richardson <arichard@stark.cc.oh.us> |
| 2312 | 30 ## Created: July 1994 |
| 31 ## Adapted-By: jwe | |
| 559 | 32 |
|
11469
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Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
10793
diff
changeset
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33 function [R, G, B] = ind2rgb (x, map) |
| 1024 | 34 |
| 6247 | 35 ## Do we have the right number of inputs? |
| 1024 | 36 if (nargin < 1 || nargin > 2) |
| 6046 | 37 print_usage (); |
| 1024 | 38 elseif (nargin == 1) |
| 39 map = colormap (); | |
| 559 | 40 endif |
| 41 | |
| 6247 | 42 ## Check if X is an indexed image. |
|
13279
984359717d71
Use common code idiom for checking whether a double value is an integer.
Rik <octave@nomad.inbox5.com>
parents:
11587
diff
changeset
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43 if (ndims (x) != 2 || any (x(:) != fix (x(:))) || min (x(:)) < 1) |
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11472
1740012184f9
Use uppercase for variable names in error() strings to match Info documentation. Only m-files done.
Rik <octave@nomad.inbox5.com>
parents:
11469
diff
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44 error ("ind2rgb: X must be an indexed image"); |
| 6247 | 45 endif |
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11587
c792872f8942
all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents:
11523
diff
changeset
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46 |
| 6247 | 47 ## Check the color map. |
| 48 if (ndims (map) != 2 || columns (map) != 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:
11469
diff
changeset
|
49 error ("ind2rgb: MAP must be a valid colormap"); |
| 6247 | 50 endif |
| 1024 | 51 |
| 6247 | 52 ## Do we have enough colors in the color map? |
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11469
c776f063fefe
Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
10793
diff
changeset
|
53 maxidx = max (x(:)); |
| 6247 | 54 rm = rows (map); |
| 55 if (rm < maxidx) | |
| 56 ## Pad with the last color in the map. | |
| 57 pad = repmat (map(end,:), maxidx-rm, 1); | |
| 58 map(end+1:maxidx, :) = pad; | |
| 59 endif | |
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11587
c792872f8942
all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents:
11523
diff
changeset
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60 |
| 6247 | 61 ## Compute result |
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11469
c776f063fefe
Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
10793
diff
changeset
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62 [hi, wi] = size (x); |
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c776f063fefe
Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
10793
diff
changeset
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63 R = reshape (map (x(:), 1), hi, wi); |
|
c776f063fefe
Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
10793
diff
changeset
|
64 G = reshape (map (x(:), 2), hi, wi); |
|
c776f063fefe
Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
10793
diff
changeset
|
65 B = reshape (map (x(:), 3), hi, wi); |
| 559 | 66 |
| 6247 | 67 ## Use 3D array if only one output is requested. |
| 68 if (nargout <= 1) | |
| 69 R(:,:,3) = B; | |
| 70 R(:,:,2) = G; | |
| 71 endif | |
| 559 | 72 endfunction |