Mercurial > hg > orthanc-stone
annotate Framework/Toolbox/DicomFrameConverter.cpp @ 40:7207a407bcd8
shared copyright with osimis
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 04 Jan 2017 16:37:42 +0100 |
parents | a865c7992a87 |
children | 28956ed68280 |
rev | line source |
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0 | 1 /** |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
40
7207a407bcd8
shared copyright with osimis
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
34
diff
changeset
|
5 * Copyright (C) 2017 Osimis, Belgium |
0 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU General Public License as | |
9 * published by the Free Software Foundation, either version 3 of the | |
10 * License, or (at your option) any later version. | |
11 * | |
12 * In addition, as a special exception, the copyright holders of this | |
13 * program give permission to link the code of its release with the | |
14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
15 * that use the same license as the "OpenSSL" library), and distribute | |
16 * the linked executables. You must obey the GNU General Public License | |
17 * in all respects for all of the code used other than "OpenSSL". If you | |
18 * modify file(s) with this exception, you may extend this exception to | |
19 * your version of the file(s), but you are not obligated to do so. If | |
20 * you do not wish to do so, delete this exception statement from your | |
21 * version. If you delete this exception statement from all source files | |
22 * in the program, then also delete it here. | |
23 * | |
24 * This program is distributed in the hope that it will be useful, but | |
25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
27 * General Public License for more details. | |
28 * | |
29 * You should have received a copy of the GNU General Public License | |
30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
31 **/ | |
32 | |
33 | |
34 #include "DicomFrameConverter.h" | |
35 | |
32 | 36 #include "GeometryToolbox.h" |
37 | |
16 | 38 #include "../../Resources/Orthanc/Core/Images/Image.h" |
39 #include "../../Resources/Orthanc/Core/Images/ImageProcessing.h" | |
40 #include "../../Resources/Orthanc/Core/OrthancException.h" | |
41 #include "../../Resources/Orthanc/Core/Toolbox.h" | |
0 | 42 |
43 namespace OrthancStone | |
44 { | |
45 void DicomFrameConverter::SetDefaultParameters() | |
46 { | |
47 isSigned_ = true; | |
48 isColor_ = false; | |
49 hasRescale_ = false; | |
50 rescaleIntercept_ = 0; | |
51 rescaleSlope_ = 1; | |
52 defaultWindowCenter_ = 128; | |
53 defaultWindowWidth_ = 256; | |
54 } | |
55 | |
56 | |
57 Orthanc::PixelFormat DicomFrameConverter::GetExpectedPixelFormat() const | |
58 { | |
59 // TODO Add more checks, e.g. on the number of bytes per value | |
60 // (cf. DicomImageInformation.h in Orthanc) | |
61 | |
62 if (isColor_) | |
63 { | |
64 return Orthanc::PixelFormat_RGB24; | |
65 } | |
66 else if (isSigned_) | |
67 { | |
68 return Orthanc::PixelFormat_SignedGrayscale16; | |
69 } | |
70 else | |
71 { | |
72 return Orthanc::PixelFormat_Grayscale16; | |
73 } | |
74 } | |
75 | |
76 | |
32 | 77 void DicomFrameConverter::ReadParameters(const OrthancPlugins::IDicomDataset& dicom) |
0 | 78 { |
79 SetDefaultParameters(); | |
80 | |
32 | 81 Vector c, w; |
82 if (GeometryToolbox::ParseVector(c, dicom, OrthancPlugins::DICOM_TAG_WINDOW_CENTER) && | |
34 | 83 GeometryToolbox::ParseVector(w, dicom, OrthancPlugins::DICOM_TAG_WINDOW_WIDTH) && |
84 c.size() > 0 && | |
85 w.size() > 0) | |
0 | 86 { |
34 | 87 defaultWindowCenter_ = static_cast<float>(c[0]); |
88 defaultWindowWidth_ = static_cast<float>(w[0]); | |
0 | 89 } |
90 | |
32 | 91 OrthancPlugins::DicomDatasetReader reader(dicom); |
0 | 92 |
32 | 93 int tmp; |
94 if (!reader.GetIntegerValue(tmp, OrthancPlugins::DICOM_TAG_PIXEL_REPRESENTATION)) | |
0 | 95 { |
32 | 96 // Type 1 tag, must be present |
97 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat); | |
98 } | |
99 | |
100 isSigned_ = (tmp == 1); | |
101 | |
102 if (reader.GetFloatValue(rescaleIntercept_, OrthancPlugins::DICOM_TAG_RESCALE_INTERCEPT) && | |
103 reader.GetFloatValue(rescaleSlope_, OrthancPlugins::DICOM_TAG_RESCALE_SLOPE)) | |
104 { | |
0 | 105 hasRescale_ = true; |
106 } | |
107 | |
32 | 108 // Type 1 tag, must be present |
109 std::string photometric = reader.GetMandatoryStringValue(OrthancPlugins::DICOM_TAG_PHOTOMETRIC_INTERPRETATION); | |
0 | 110 photometric = Orthanc::Toolbox::StripSpaces(photometric); |
111 isColor_ = (photometric != "MONOCHROME1" && | |
112 photometric != "MONOCHROME2"); | |
113 } | |
114 | |
115 | |
116 void DicomFrameConverter::ConvertFrame(std::auto_ptr<Orthanc::ImageAccessor>& source) const | |
117 { | |
118 assert(sizeof(float) == 4); | |
119 | |
120 if (source.get() == NULL) | |
121 { | |
122 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
123 } | |
124 | |
125 Orthanc::PixelFormat sourceFormat = source->GetFormat(); | |
126 | |
127 if (sourceFormat != GetExpectedPixelFormat()) | |
128 { | |
129 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
130 } | |
131 | |
132 if (sourceFormat == Orthanc::PixelFormat_RGB24) | |
133 { | |
134 // No conversion has to be done | |
135 return; | |
136 } | |
137 | |
138 assert(sourceFormat == Orthanc::PixelFormat_Grayscale16 || | |
139 sourceFormat == Orthanc::PixelFormat_SignedGrayscale16); | |
140 | |
141 // This is the case of a grayscale frame. Convert it to Float32. | |
142 std::auto_ptr<Orthanc::Image> converted(new Orthanc::Image(Orthanc::PixelFormat_Float32, | |
143 source->GetWidth(), | |
11 | 144 source->GetHeight(), |
145 false)); | |
0 | 146 Orthanc::ImageProcessing::Convert(*converted, *source); |
147 | |
148 source.reset(NULL); // We don't need the source frame anymore | |
149 | |
150 // Correct rescale slope/intercept if need be | |
151 if (hasRescale_) | |
152 { | |
153 for (unsigned int y = 0; y < converted->GetHeight(); y++) | |
154 { | |
155 float* p = reinterpret_cast<float*>(converted->GetRow(y)); | |
156 for (unsigned int x = 0; x < converted->GetWidth(); x++, p++) | |
157 { | |
158 float value = *p; | |
159 | |
160 if (hasRescale_) | |
161 { | |
162 value = value * rescaleSlope_ + rescaleIntercept_; | |
163 } | |
164 | |
165 *p = value; | |
166 } | |
167 } | |
168 } | |
169 | |
170 source = converted; | |
171 } | |
172 } |