X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?p=CreaPhase.git;a=blobdiff_plain;f=octave_packages%2Fm%2Fimage%2Fimread.m;fp=octave_packages%2Fm%2Fimage%2Fimread.m;h=701224b00ac38757bfde7e2005708d829b681601;hp=0000000000000000000000000000000000000000;hb=1c0469ada9531828709108a4882a751d2816994a;hpb=63de9f36673d49121015e3695f2c336ea92bc278

diff --git a/octave_packages/m/image/imread.m b/octave_packages/m/image/imread.m
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+## Copyright (C) 2008-2012 Thomas L. Scofield <scofield@calvin.edu>
+## Copyright (C) 2008 Kristian Rumberg <kristianrumberg@gmail.com>
+## Copyright (C) 2006 Thomas Weber <thomas.weber.mail@gmail.com>
+## Copyright (C) 2005 Stefan van der Walt <stefan@sun.ac.za>
+## Copyright (C) 2002 Andy Adler
+##
+## 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{img}, @var{map}, @var{alpha}] =} imread (@var{filename})
+## Read images from various file formats.
+##
+## The size and numeric class of the output depends on the
+## format of the image.  A color image is returned as an
+## @nospell{MxNx3} matrix.  Gray-level and black-and-white images are
+## of size @nospell{MxN}.
+## The color depth of the image determines the numeric
+## class of the output: "uint8" or "uint16" for gray
+## and color, and "logical" for black and white.
+##
+## @seealso{imwrite, imfinfo}
+## @end deftypefn
+
+function varargout = imread (filename, varargin)
+
+  if (nargin < 1)
+    print_usage ();
+  endif
+
+  if (! ischar (filename))
+    error ("imread: FILENAME must be a string");
+  endif
+
+  filename = tilde_expand (filename);
+
+  fn = file_in_path (IMAGE_PATH, filename);
+
+  if (isempty (fn))
+    error ("imread: cannot find %s", filename);
+  endif
+
+  try
+    [varargout{1:nargout}] = __magick_read__ (fn, varargin{:});
+  catch
+
+    magick_error = lasterr ();
+
+    img_field = false;
+    x_field = false;
+    map_field = false;
+
+    try
+      vars = load (fn);
+      if (isstruct (vars))
+        img_field = isfield (vars, "img");
+        x_field = isfield (vars, "X");
+        map_field = isfield (vars, "map");
+      endif
+    catch
+      error ("imread: invalid image file: %s", magick_error);
+    end_try_catch
+
+    if (map_field && (img_field || x_field))
+      varargout{2} = vars.map;
+      if (img_field)
+        varargout{1} = vars.img;
+      else
+        varargout{1} = vars.X;
+      endif
+    else
+      error ("imread: invalid Octave image file format");
+    endif
+
+  end_try_catch
+
+endfunction
+
+%!testif HAVE_MAGICK
+%! vpng = [ ...
+%!  137,  80,  78,  71,  13,  10,  26,  10,   0,   0, ...
+%!    0,  13,  73,  72,  68,  82,   0,   0,   0,   3, ...
+%!    0,   0,   0,   3,   8,   2,   0,   0,   0, 217, ...
+%!   74,  34, 232,   0,   0,   0,   1, 115,  82,  71, ...
+%!   66,   0, 174, 206,  28, 233,   0,   0,   0,   4, ...
+%!  103,  65,  77,  65,   0,   0, 177, 143,  11, 252, ...
+%!   97,   5,   0,   0,   0,  32,  99,  72,  82,  77, ...
+%!    0,   0, 122,  38,   0,   0, 128, 132,   0,   0, ...
+%!  250,   0,   0,   0, 128, 232,   0,   0, 117,  48, ...
+%!    0,   0, 234,  96,   0,   0,  58, 152,   0,   0, ...
+%!   23, 112, 156, 186,  81,  60,   0,   0,   0,  25, ...
+%!   73,  68,  65,  84,  24,  87,  99,  96,  96,  96, ...
+%!  248, 255, 255,  63, 144,   4,  81, 111, 101,  84, ...
+%!   16,  28, 160,  16,   0, 197, 214,  13,  34,  74, ...
+%!  117, 213,  17,   0,   0,   0,   0,  73,  69,  78, ...
+%!   68, 174,  66,  96, 130];
+%! fid = fopen('test.png', 'wb');
+%! fwrite(fid, vpng);
+%! fclose(fid);
+%! A = imread('test.png');
+%! delete('test.png');
+%! assert(A(:,:,1), uint8 ([0, 255, 0; 255, 237, 255; 0, 255, 0]));
+%! assert(A(:,:,2), uint8 ([0, 255, 0; 255,  28, 255; 0, 255, 0]));
+%! assert(A(:,:,3), uint8 ([0, 255, 0; 255,  36, 255; 0, 255, 0]));