Mercurial > hg > orthanc-wsi
annotate Framework/Inputs/DicomPyramidInstance.cpp @ 58:35468714a38e
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 24 Nov 2016 19:54:44 +0100 |
parents | 83cd735c885d |
children | 7a3853d51c45 |
rev | line source |
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0 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
5 * | |
6 * This program is free software: you can redistribute it and/or | |
7 * modify it under the terms of the GNU Affero General Public License | |
8 * as published by the Free Software Foundation, either version 3 of | |
9 * the License, or (at your option) any later version. | |
10 * | |
11 * This program is distributed in the hope that it will be useful, but | |
12 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 * Affero General Public License for more details. | |
15 * | |
16 * You should have received a copy of the GNU Affero General Public License | |
17 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 **/ | |
19 | |
20 | |
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21 #include "../PrecompiledHeadersWSI.h" |
0 | 22 #include "DicomPyramidInstance.h" |
23 | |
24 #include "../Orthanc/Core/Logging.h" | |
25 #include "../Orthanc/Core/OrthancException.h" | |
26 #include "../Orthanc/Core/Toolbox.h" | |
27 #include "../DicomToolbox.h" | |
28 | |
29 #include <cassert> | |
30 | |
31 namespace OrthancWSI | |
32 { | |
33 static ImageCompression DetectImageCompression(const Json::Value& header) | |
34 { | |
35 std::string s = Orthanc::Toolbox::StripSpaces | |
36 (DicomToolbox::GetMandatoryStringTag(header, "TransferSyntaxUID")); | |
37 | |
38 if (s == "1.2.840.10008.1.2" || | |
39 s == "1.2.840.10008.1.2.1") | |
40 { | |
41 return ImageCompression_None; | |
42 } | |
43 else if (s == "1.2.840.10008.1.2.4.50") | |
44 { | |
45 return ImageCompression_Jpeg; | |
46 } | |
47 else if (s == "1.2.840.10008.1.2.4.90" || | |
48 s == "1.2.840.10008.1.2.4.91") | |
49 { | |
50 return ImageCompression_Jpeg2000; | |
51 } | |
52 else | |
53 { | |
54 LOG(ERROR) << "Unsupported transfer syntax: " << s; | |
55 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
56 } | |
57 } | |
58 | |
59 | |
60 static Orthanc::PixelFormat DetectPixelFormat(const Json::Value& dicom) | |
61 { | |
62 std::string photometric = Orthanc::Toolbox::StripSpaces | |
63 (DicomToolbox::GetMandatoryStringTag(dicom, "PhotometricInterpretation")); | |
64 | |
65 if (photometric == "PALETTE") | |
66 { | |
67 LOG(ERROR) << "Unsupported photometric interpretation: " << photometric; | |
68 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
69 } | |
70 | |
71 unsigned int bitsStored = DicomToolbox::GetUnsignedIntegerTag(dicom, "BitsStored"); | |
72 unsigned int samplesPerPixel = DicomToolbox::GetUnsignedIntegerTag(dicom, "SamplesPerPixel"); | |
73 bool isSigned = (DicomToolbox::GetUnsignedIntegerTag(dicom, "PixelRepresentation") != 0); | |
74 | |
75 if (bitsStored == 8 && | |
76 samplesPerPixel == 1 && | |
77 !isSigned) | |
78 { | |
79 return Orthanc::PixelFormat_Grayscale8; | |
80 } | |
81 else if (bitsStored == 8 && | |
82 samplesPerPixel == 3 && | |
83 !isSigned) | |
84 { | |
85 return Orthanc::PixelFormat_RGB24; | |
86 } | |
87 else | |
88 { | |
89 LOG(ERROR) << "Unsupported pixel format"; | |
90 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
91 } | |
92 } | |
93 | |
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94 |
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95 ImageCompression DicomPyramidInstance::GetImageCompression(IOrthancConnection& orthanc) |
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96 { |
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97 /** |
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98 * Lazy detection of the image compression using the transfer |
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99 * syntax stored inside the DICOM header. Given the fact that |
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100 * reading the header is a time-consuming operation (it implies |
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101 * the decoding of the DICOM image by Orthanc, whereas the "/tags" |
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102 * endpoint only reads the "DICOM-as-JSON" attachment), the |
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103 * "/header" REST call is delayed until it is really required. |
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104 **/ |
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105 |
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106 if (!hasCompression_) |
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107 { |
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108 Json::Value header; |
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109 IOrthancConnection::RestApiGet(header, orthanc, "/instances/" + instanceId_ + "/header?simplify"); |
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110 |
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111 hasCompression_ = true; |
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112 compression_ = DetectImageCompression(header); |
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113 } |
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114 |
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115 return compression_; |
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116 } |
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117 |
0 | 118 |
119 DicomPyramidInstance::DicomPyramidInstance(IOrthancConnection& orthanc, | |
120 const std::string& instanceId) : | |
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121 instanceId_(instanceId), |
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122 hasCompression_(false) |
0 | 123 { |
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124 Json::Value dicom; |
0 | 125 IOrthancConnection::RestApiGet(dicom, orthanc, "/instances/" + instanceId + "/tags?simplify"); |
126 | |
127 if (DicomToolbox::GetMandatoryStringTag(dicom, "SOPClassUID") != "1.2.840.10008.5.1.4.1.1.77.1.6" || | |
128 DicomToolbox::GetMandatoryStringTag(dicom, "Modality") != "SM") | |
129 { | |
130 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
131 } | |
132 | |
133 format_ = DetectPixelFormat(dicom); | |
134 tileWidth_ = DicomToolbox::GetUnsignedIntegerTag(dicom, "Columns"); | |
135 tileHeight_ = DicomToolbox::GetUnsignedIntegerTag(dicom, "Rows"); | |
136 totalWidth_ = DicomToolbox::GetUnsignedIntegerTag(dicom, "TotalPixelMatrixColumns"); | |
137 totalHeight_ = DicomToolbox::GetUnsignedIntegerTag(dicom, "TotalPixelMatrixRows"); | |
138 | |
139 const Json::Value& frames = DicomToolbox::GetSequenceTag(dicom, "PerFrameFunctionalGroupsSequence"); | |
140 | |
141 if (frames.size() != DicomToolbox::GetUnsignedIntegerTag(dicom, "NumberOfFrames")) | |
142 { | |
143 LOG(ERROR) << "Mismatch between the number of frames in instance: " << instanceId; | |
144 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat); | |
145 } | |
146 | |
147 frames_.resize(frames.size()); | |
148 | |
149 for (Json::Value::ArrayIndex i = 0; i < frames.size(); i++) | |
150 { | |
151 const Json::Value& frame = DicomToolbox::GetSequenceTag(frames[i], "PlanePositionSlideSequence"); | |
152 if (frame.size() != 1) | |
153 { | |
154 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat); | |
155 } | |
156 | |
157 // "-1", because coordinates are shifted by 1 in DICOM | |
158 int xx = DicomToolbox::GetIntegerTag(frame[0], "ColumnPositionInTotalImagePixelMatrix") - 1; | |
159 int yy = DicomToolbox::GetIntegerTag(frame[0], "RowPositionInTotalImagePixelMatrix") - 1; | |
160 | |
161 unsigned int x = static_cast<unsigned int>(xx); | |
162 unsigned int y = static_cast<unsigned int>(yy); | |
163 | |
164 if (xx < 0 || | |
165 yy < 0 || | |
166 x % tileWidth_ != 0 || | |
167 y % tileHeight_ != 0 || | |
168 x >= totalWidth_ || | |
169 y >= totalHeight_) | |
170 { | |
171 LOG(ERROR) << "Frame " << i << " with unexpected tile location (" | |
172 << x << "," << y << ") in instance: " << instanceId; | |
173 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat); | |
174 } | |
175 | |
176 frames_[i].first = x / tileWidth_; | |
177 frames_[i].second = y / tileHeight_; | |
178 } | |
179 } | |
180 | |
181 | |
182 unsigned int DicomPyramidInstance::GetFrameLocationX(size_t frame) const | |
183 { | |
184 assert(frame < frames_.size()); | |
185 return frames_[frame].first; | |
186 } | |
187 | |
188 | |
189 unsigned int DicomPyramidInstance::GetFrameLocationY(size_t frame) const | |
190 { | |
191 assert(frame < frames_.size()); | |
192 return frames_[frame].second; | |
193 } | |
194 } |