Mercurial > octave-nkf
view scripts/image/ind2rgb.m @ 19631:db92e7e28e1f
strip trailing whitespace from most source files
* NEWS, doc/interpreter/contributors.in, doc/interpreter/func.txi,
doc/interpreter/genpropdoc.m, doc/interpreter/octave_logo.eps,
doc/interpreter/plot.txi, doc/interpreter/stmt.txi,
examples/data/Makefile.am, libinterp/corefcn/data.cc,
libinterp/corefcn/debug.cc, libinterp/corefcn/error.cc,
libinterp/corefcn/file-io.cc, libinterp/corefcn/gl-render.cc,
libinterp/corefcn/graphics.cc, libinterp/corefcn/graphics.in.h,
libinterp/corefcn/load-path.cc, libinterp/corefcn/pr-output.cc,
libinterp/corefcn/pt-jit.cc, libinterp/corefcn/strfind.cc,
libinterp/corefcn/toplev.cc, libinterp/corefcn/toplev.h,
libinterp/corefcn/urlwrite.cc, libinterp/corefcn/variables.cc,
libinterp/octave-value/ov-classdef.cc,
libinterp/octave-value/ov-classdef.h, libinterp/octave.cc,
libinterp/parse-tree/lex.h, libinterp/parse-tree/oct-parse.in.yy,
libinterp/parse-tree/pt-classdef.h, liboctave/system/file-ops.cc,
liboctave/system/oct-env.cc, m4/acinclude.m4,
scripts/deprecated/finite.m, scripts/deprecated/fmod.m,
scripts/deprecated/fnmatch.m, scripts/deprecated/luinc.m,
scripts/deprecated/octave_tmp_file_name.m, scripts/deprecated/syl.m,
scripts/deprecated/usage.m, scripts/general/inputParser.m,
scripts/general/interp1.m, scripts/general/interp2.m,
scripts/general/interp3.m, scripts/general/isequal.m,
scripts/general/private/__isequal__.m, scripts/geometry/voronoi.m,
scripts/image/image.m, scripts/image/imshow.m,
scripts/image/ind2rgb.m, scripts/linear-algebra/bandwidth.m,
scripts/linear-algebra/isbanded.m, scripts/miscellaneous/bzip2.m,
scripts/miscellaneous/cast.m, scripts/miscellaneous/copyfile.m,
scripts/miscellaneous/delete.m, scripts/miscellaneous/fullfile.m,
scripts/miscellaneous/getappdata.m, scripts/miscellaneous/gunzip.m,
scripts/miscellaneous/isappdata.m, scripts/miscellaneous/ls.m,
scripts/miscellaneous/mex.m, scripts/miscellaneous/movefile.m,
scripts/miscellaneous/orderfields.m, scripts/miscellaneous/recycle.m,
scripts/miscellaneous/rmappdata.m, scripts/miscellaneous/setfield.m,
scripts/miscellaneous/symvar.m, scripts/miscellaneous/tar.m,
scripts/miscellaneous/tmpnam.m, scripts/miscellaneous/unpack.m,
scripts/miscellaneous/ver.m, scripts/miscellaneous/what.m,
scripts/miscellaneous/xor.m, scripts/miscellaneous/zip.m,
scripts/optimization/fminbnd.m, scripts/optimization/sqp.m,
scripts/path/private/getsavepath.m, scripts/path/savepath.m,
scripts/pkg/pkg.m, scripts/pkg/private/installed_packages.m,
scripts/plot/draw/plotyy.m, scripts/plot/draw/polar.m,
scripts/plot/draw/private/__quiver__.m,
scripts/plot/draw/private/__scatter__.m,
scripts/plot/draw/private/__stem__.m, scripts/plot/draw/surface.m,
scripts/plot/draw/surfnorm.m, scripts/plot/util/copyobj.m,
scripts/plot/util/hgload.m, scripts/plot/util/hgsave.m,
scripts/plot/util/isprop.m, scripts/plot/util/linkprop.m,
scripts/plot/util/private/__go_draw_axes__.m, scripts/set/setdiff.m,
scripts/set/union.m, scripts/signal/periodogram.m,
scripts/sparse/eigs.m, scripts/sparse/ilu.m, scripts/sparse/qmr.m,
scripts/sparse/sprand.m, scripts/sparse/sprandn.m,
scripts/specfun/beta.m, scripts/specfun/ellipke.m,
scripts/specfun/isprime.m, scripts/statistics/base/lscov.m,
scripts/testfun/__run_test_suite__.m, scripts/testfun/test.m:
Strip trailing whitespace.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 20 Jan 2015 10:29:54 -0500 |
parents | 875f4510d6dc |
children | e5facc6eec13 |
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## Copyright (C) 1994-2013 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 3 of the License, 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, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {@var{rgb} =} ind2rgb (@var{x}, @var{map}) ## @deftypefnx {Function File} {[@var{R}, @var{G}, @var{B}] =} ind2rgb (@var{x}, @var{map}) ## Convert an indexed image to red, green, and blue color components. ## ## The image @var{x} must be an indexed image which will be converted using the ## colormap @var{map}. If @var{map} does not contain enough colors for the ## image, pixels in @var{x} outside the range are mapped to the last color in ## the map. ## ## The output may be a single RGB image (@nospell{MxNx3} matrix where M and N ## are the original image @var{x} dimensions, one for each of the red, green ## and blue channels). Alternatively, the individual red, green, and blue ## color matrices of size @nospell{MxN} may be returned. ## ## Multi-dimensional indexed images (of size @nospell{MxNx1xK}) are also ## supported. ## ## @seealso{rgb2ind, ind2gray, hsv2rgb, ntsc2rgb} ## @end deftypefn ## Author: Tony Richardson <arichard@stark.cc.oh.us> ## Created: July 1994 ## Adapted-By: jwe function [R, G, B] = ind2rgb (x, map) if (nargin != 2) print_usage (); endif [x, map] = ind2x ("ind2rgb", x, map); ## Compute result sz = size (x); R = reshape (map(x(:), 1), sz); G = reshape (map(x(:), 2), sz); B = reshape (map(x(:), 3), sz); ## Use ND array if only one output is requested. if (nargout <= 1) if (ndims (x) == 2) R = reshape ([R(:); G(:); B(:)], [sz, 3]); elseif (ndims (x) == 4) R = permute (reshape ([R(:); G(:); B(:)], [sz(1) sz(2) sz(4) 3]), [1 2 4 3]); else ## we should never reach here since ind2x() should filter them out error ("ind2rgb: an indexed image must have 2 or 4 dimensions."); endif endif endfunction %!shared img, map, ergb, rgb, r, g, b %! img = [2 4 5; 3 2 5; 1 2 4]; %! map = [0.0 0.0 0.0 %! 0.2 0.4 0.6 %! 0.4 0.4 0.5 %! 0.3 0.7 1.0 %! 0.1 0.5 0.8]; %! ergb(:,:,1) = [0.2 0.3 0.1; 0.4 0.2 0.1; 0.0 0.2 0.3]; %! ergb(:,:,2) = [0.4 0.7 0.5; 0.4 0.4 0.5; 0.0 0.4 0.7]; %! ergb(:,:,3) = [0.6 1.0 0.8; 0.5 0.6 0.8; 0.0 0.6 1.0]; %! ## test basic usage with 1 and 3 outputs %! [rgb] = ind2rgb (img, map); %! [r, g, b] = ind2rgb (img, map); %! %!assert (ergb, rgb) %!assert (ergb, reshape ([r(:) g(:) b(:)], [size(img) 3])) %!test %! ## test correction for integers %! img = uint8 (img - 1); %! [rgb] = ind2rgb (img, map); %! assert (ergb, rgb); %!test %! ## Check that values below lower bound are mapped to first color value %! rgb = ind2rgb ([-1 0 2], gray (64)); %! assert (rgb(:,1:2,:), zeros (1,2,3)); %! assert (rgb(:,3,:), 1/63 * ones (1,1,3)); %% Test input validation %!error ind2rgb () %!error ind2rgb (1,2,3) %!error <X must be an indexed image> ind2rgb (ones (3,3,3), jet (64)) %!error <X must be an indexed image> ind2rgb (1+i, jet (64)) %!error <X must be an indexed image> ind2rgb (sparse (1), jet (64)) %!error <X must be an indexed image> ind2rgb (1.1, jet (64)) %!error <X must be an indexed image> ind2rgb ({1}, jet (64)) %!error <MAP must be a valid colormap> ind2rgb (1, {1}) %!error <MAP must be a valid colormap> ind2rgb (1, 1+i) %!error <MAP must be a valid colormap> ind2rgb (1, ones (2,2,2)) %!error <MAP must be a valid colormap> ind2rgb (1, ones (2,4)) %!error <MAP must be a valid colormap> ind2rgb (1, [-1]) %!error <MAP must be a valid colormap> ind2rgb (1, [2]) %!warning <contains colors outside of colormap> ind2rgb ([-1 1], jet (64)); %!warning <contains colors outside of colormap> ind2rgb ([0 1 2], gray (5)); %!warning <contains colors outside of colormap> ind2rgb ([1 2 6], gray (5)); %!warning <contains colors outside of colormap> ind2rgb (uint8 ([1 2 5]), gray (5));