Mercurial > hg > octave-nkf
annotate scripts/image/rgb2ind.m @ 14138:72c96de7a403 stable
maint: update copyright notices for 2012
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Mon, 02 Jan 2012 14:25:41 -0500 |
| parents | c792872f8942 |
| children | 1f911333ed3d |
| rev | line source |
|---|---|
|
14138
72c96de7a403
maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
parents:
11587
diff
changeset
|
1 ## Copyright (C) 1994-2012 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 -*- |
| 5922 | 20 ## @deftypefn {Function File} {[@var{x}, @var{map}] =} rgb2ind (@var{rgb}) |
|
11469
c776f063fefe
Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
8920
diff
changeset
|
21 ## @deftypefnx {Function File} {[@var{x}, @var{map}] =} rgb2ind (@var{R}, @var{G}, @var{B}) |
|
8347
fa78cb8d8a5c
corrections for typos
Brian Gough<bjg@network-theory.co.uk>
parents:
7017
diff
changeset
|
22 ## Convert an RGB image to an Octave indexed image. |
| 5642 | 23 ## @seealso{ind2rgb, rgb2ntsc} |
| 3373 | 24 ## @end deftypefn |
| 25 | |
| 2311 | 26 ## Bugs: The color map may have duplicate entries. |
| 904 | 27 |
| 3202 | 28 ## Author: Tony Richardson <arichard@stark.cc.oh.us> |
| 2312 | 29 ## Created: July 1994 |
| 30 ## Adapted-By: jwe | |
| 559 | 31 |
|
11469
c776f063fefe
Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
8920
diff
changeset
|
32 function [x, map] = rgb2ind (R, G, B) |
| 1024 | 33 |
| 5922 | 34 if (nargin != 1 && nargin != 3) |
| 35 print_usage (); | |
| 36 endif | |
|
11587
c792872f8942
all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents:
11523
diff
changeset
|
37 |
| 5922 | 38 if (nargin == 1) |
| 39 rgb = R; | |
| 40 if (length (size (rgb)) == 3 && size (rgb, 3) == 3) | |
| 41 R = rgb(:,:,1); | |
| 42 G = rgb(:,:,2); | |
| 43 B = rgb(:,:,3); | |
| 44 else | |
| 45 error ("rgb2ind: argument is not an RGB image"); | |
| 46 endif | |
| 559 | 47 endif |
| 48 | |
| 6157 | 49 if (! size_equal (R, G) || ! size_equal (R, B)) |
| 1024 | 50 error ("rgb2ind: arguments must all have the same size"); |
| 51 endif | |
| 559 | 52 |
| 1024 | 53 [hi, wi] = size (R); |
| 559 | 54 |
|
11469
c776f063fefe
Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
8920
diff
changeset
|
55 x = zeros (hi, wi); |
| 1024 | 56 |
| 57 map = zeros (hi*wi, 3); | |
| 559 | 58 |
| 3486 | 59 map(:,1) = R(:); |
| 60 map(:,2) = G(:); | |
| 61 map(:,3) = B(:); | |
| 559 | 62 |
|
11469
c776f063fefe
Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents:
8920
diff
changeset
|
63 x(:) = 1:(hi*wi); |
| 559 | 64 |
| 65 endfunction |