297
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Affero General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Affero General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Affero General Public License
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #include "TiffReader.h"
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24
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25 #include <Logging.h>
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26 #include <OrthancException.h>
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27
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28 namespace OrthancWSI
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29 {
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30 TiffReader::TiffReader(const std::string& path)
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31 {
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32 tiff_ = TIFFOpen(path.c_str(), "r");
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33 if (tiff_ == NULL)
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34 {
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35 throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentFile,
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36 "libtiff cannot open: " + path);
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37 }
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38 }
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39
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40
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41 TiffReader::~TiffReader()
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42 {
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43 if (tiff_)
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44 {
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45 TIFFClose(tiff_);
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46 tiff_ = NULL;
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47 }
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48 }
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49
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50
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51 bool TiffReader::GetCurrentDirectoryInformation(ImageCompression& compression,
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52 Orthanc::PixelFormat& pixelFormat,
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53 Orthanc::PhotometricInterpretation& photometric)
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54 {
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55 uint16_t c;
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56 if (!TIFFGetField(tiff_, TIFFTAG_COMPRESSION, &c))
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57 {
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58 return false;
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59 }
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60
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61 switch (c)
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62 {
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63 case COMPRESSION_NONE:
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64 compression = ImageCompression_None;
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65 break;
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66
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67 case COMPRESSION_JPEG:
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68 compression = ImageCompression_Jpeg;
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69 break;
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70
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71 default:
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72 return false;
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73 }
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74
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75 // http://www.awaresystems.be/imaging/tiff/tifftags/baseline.html
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76
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77 uint16_t channels, photometricTiff, bpp, planar;
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78 if (!TIFFGetField(tiff_, TIFFTAG_SAMPLESPERPIXEL, &channels) ||
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79 channels == 0 ||
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80 !TIFFGetField(tiff_, TIFFTAG_PHOTOMETRIC, &photometricTiff) ||
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81 !TIFFGetField(tiff_, TIFFTAG_BITSPERSAMPLE, &bpp) ||
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82 !TIFFGetField(tiff_, TIFFTAG_PLANARCONFIG, &planar))
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83 {
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84 return false;
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85 }
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86
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87 if (compression == ImageCompression_Jpeg &&
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88 channels == 3 && // This is a color image
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89 bpp == 8 &&
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90 planar == PLANARCONFIG_CONTIG) // This is interleaved RGB
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91 {
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92 pixelFormat = Orthanc::PixelFormat_RGB24;
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93
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94 switch (photometricTiff)
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95 {
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96 case PHOTOMETRIC_YCBCR:
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97 photometric = Orthanc::PhotometricInterpretation_YBRFull422;
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98 break;
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99
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100 case PHOTOMETRIC_RGB:
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101 photometric = Orthanc::PhotometricInterpretation_RGB;
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102 break;
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103
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104 default:
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105 LOG(ERROR) << "Unknown photometric interpretation in TIFF: " << photometricTiff;
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106 return false;
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107 }
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108 }
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109 else if (compression == ImageCompression_None &&
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110 channels == 3 && // This is a color image
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111 bpp == 8 &&
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112 planar == PLANARCONFIG_CONTIG) // This is interleaved RGB
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113 {
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114 pixelFormat = Orthanc::PixelFormat_RGB24;
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115 photometric = Orthanc::PhotometricInterpretation_RGB;
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116 }
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117 else if (compression == ImageCompression_Jpeg &&
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118 channels == 1 && // This is a grayscale image
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119 bpp == 8)
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120 {
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121 pixelFormat = Orthanc::PixelFormat_Grayscale8;
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122 photometric = Orthanc::PhotometricInterpretation_Monochrome2;
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123 }
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124 else
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125 {
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126 return false;
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127 }
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128
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129 return true;
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130 }
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131 }
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