Mercurial > hg > orthanc-stone
annotate Framework/Toolbox/DicomFrameConverter.cpp @ 40:7207a407bcd8
shared copyright with osimis
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 04 Jan 2017 16:37:42 +0100 |
| parents | a865c7992a87 |
| children | 28956ed68280 |
| rev | line source |
|---|---|
| 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 } |