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annotate scripts/image/imread.m @ 16768:e2de3c8882be

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copyright notice fixes * libgui/src/color-picker.cc, libgui/src/color-picker.h, libgui/src/m-editor/octave-qscintilla.cc, libgui/src/m-editor/octave-qscintilla.h, libgui/src/qtinfo/parser.cc, libgui/src/qtinfo/parser.h, libgui/src/qtinfo/webinfo.cc, libgui/src/qtinfo/webinfo.h, libinterp/corefcn/ellipj.cc, libinterp/interp-core/jit-ir.cc, libinterp/interp-core/jit-ir.h, libinterp/interp-core/jit-typeinfo.cc, libinterp/interp-core/jit-typeinfo.h, libinterp/interp-core/jit-util.cc, libinterp/interp-core/jit-util.h, libinterp/interp-core/pt-jit.cc, libinterp/interp-core/pt-jit.h, libinterp/template-inst/Array-jit.cc, liboctave/numeric/bsxfun.h, liboctave/util/kpse.cc, scripts/image/imfinfo.m, scripts/image/imread.m, scripts/io/importdata.m, scripts/io/textscan.m, scripts/java/usejava.m, scripts/linear-algebra/logm.m, scripts/sparse/bicg.m, scripts/specfun/ellipke.m, scripts/specfun/expint.m, scripts/strings/strjoin.m: List email addresses in Author: lines. Update copyright notices to use web address for FSF.
author John W. Eaton <jwe@octave.org>
date Tue, 18 Jun 2013 06:39:12 -0400
parents f3d52523cde1
children d0558ee259ad
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rev   line source
16768
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1 ## Copyright (C) 2008-2012 Thomas L. Scofield
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2 ## Copyright (C) 2008 Kristian Rumberg
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3 ## Copyright (C) 2006 Thomas Weber
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4 ## Copyright (C) 2005 Stefan van der Walt
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5 ## Copyright (C) 2002 Andy Adler
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6 ##
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7 ## This file is part of Octave.
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8 ##
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9 ## Octave is free software; you can redistribute it and/or modify it
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10 ## under the terms of the GNU General Public License as published by
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11 ## the Free Software Foundation; either version 3 of the License, or (at
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12 ## your option) any later version.
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13 ##
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14 ## Octave is distributed in the hope that it will be useful, but
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15 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 ## General Public License for more details.
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18 ##
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19 ## You should have received a copy of the GNU General Public License
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20 ## along with Octave; see the file COPYING. If not, see
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21 ## <http://www.gnu.org/licenses/>.
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22
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23 ## Author: Thomas L. Scofield <scofield@calvin.edu>
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24 ## Author: Kristian Rumberg <kristianrumberg@gmail.com>
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25 ## Author: Thomas Weber <thomas.weber.mail@gmail.com>
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26 ## Author: Stefan van der Walt <stefan@sun.ac.za>
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27 ## Author: Andy Adler
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28
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29 ## -*- texinfo -*-
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30 ## @deftypefn {Function File} {[@var{img}, @var{map}, @var{alpha}] =} imread (@var{filename})
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31 ## Read images from various file formats.
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32 ##
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33 ## The size and numeric class of the output depends on the
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34 ## format of the image. A color image is returned as an
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35 ## @nospell{MxNx3} matrix. Gray-level and black-and-white images are
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36 ## of size @nospell{MxN}.
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37 ## The color depth of the image determines the numeric
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38 ## class of the output: "uint8" or "uint16" for gray
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39 ## and color, and "logical" for black and white.
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40 ##
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41 ## @seealso{imwrite, imfinfo}
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42 ## @end deftypefn
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43
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44 function varargout = imread (filename, varargin)
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45
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46 if (nargin < 1)
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47 print_usage ();
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48 endif
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49
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50 if (! ischar (filename))
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51 error ("imread: FILENAME must be a string");
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52 endif
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53
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54 filename = tilde_expand (filename);
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55
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56 fn = file_in_path (IMAGE_PATH, filename);
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57
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58 if (isempty (fn))
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59 error ("imread: cannot find %s", filename);
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60 endif
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61
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62 try
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63 [varargout{1:nargout}] = __magick_read__ (fn, varargin{:});
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64 catch
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65
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66 magick_error = lasterr ();
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67
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68 img_field = false;
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69 x_field = false;
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70 map_field = false;
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71
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72 try
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73 vars = load (fn);
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74 if (isstruct (vars))
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75 img_field = isfield (vars, "img");
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76 x_field = isfield (vars, "X");
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77 map_field = isfield (vars, "map");
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78 endif
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79 catch
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80 error ("imread: invalid image file: %s", magick_error);
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81 end_try_catch
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82
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83 if (map_field && (img_field || x_field))
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84 varargout{2} = vars.map;
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85 if (img_field)
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86 varargout{1} = vars.img;
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87 else
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88 varargout{1} = vars.X;
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89 endif
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90 else
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91 error ("imread: invalid Octave image file format");
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92 endif
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93
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94 end_try_catch
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95
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96 endfunction
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97
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98
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99 %!testif HAVE_MAGICK
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100 %! vpng = [ ...
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101 %! 137, 80, 78, 71, 13, 10, 26, 10, 0, 0, ...
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102 %! 0, 13, 73, 72, 68, 82, 0, 0, 0, 3, ...
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103 %! 0, 0, 0, 3, 8, 2, 0, 0, 0, 217, ...
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104 %! 74, 34, 232, 0, 0, 0, 1, 115, 82, 71, ...
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105 %! 66, 0, 174, 206, 28, 233, 0, 0, 0, 4, ...
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106 %! 103, 65, 77, 65, 0, 0, 177, 143, 11, 252, ...
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107 %! 97, 5, 0, 0, 0, 32, 99, 72, 82, 77, ...
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108 %! 0, 0, 122, 38, 0, 0, 128, 132, 0, 0, ...
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109 %! 250, 0, 0, 0, 128, 232, 0, 0, 117, 48, ...
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110 %! 0, 0, 234, 96, 0, 0, 58, 152, 0, 0, ...
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111 %! 23, 112, 156, 186, 81, 60, 0, 0, 0, 25, ...
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112 %! 73, 68, 65, 84, 24, 87, 99, 96, 96, 96, ...
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113 %! 248, 255, 255, 63, 144, 4, 81, 111, 101, 84, ...
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114 %! 16, 28, 160, 16, 0, 197, 214, 13, 34, 74, ...
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115 %! 117, 213, 17, 0, 0, 0, 0, 73, 69, 78, ...
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116 %! 68, 174, 66, 96, 130];
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117 %! fid = fopen ("test.png", "wb");
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118 %! fwrite (fid, vpng);
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119 %! fclose (fid);
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120 %! A = imread ("test.png");
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
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121 %! delete ("test.png");
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
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122 %! assert (A(:,:,1), uint8 ([0, 255, 0; 255, 237, 255; 0, 255, 0]));
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
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123 %! assert (A(:,:,2), uint8 ([0, 255, 0; 255, 28, 255; 0, 255, 0]));
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
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124 %! assert (A(:,:,3), uint8 ([0, 255, 0; 255, 36, 255; 0, 255, 0]));
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
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125