Mercurial > hg > orthanc-stone
annotate Framework/Toolbox/DicomFrameConverter.cpp @ 118:a4d0b6c82b29 wasm
using Orthanc::DicomMap instead of OrthancPlugins::DicomDatasetReader
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 02 Oct 2017 14:31:26 +0200 |
| parents | 2eca030792aa |
| children | ba83e38cf3ff |
| 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 | |
|
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5 * Copyright (C) 2017 Osimis, Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 47 | 8 * modify it under the terms of the GNU Affero General Public License |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 0 | 11 * |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 47 | 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 0 | 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "DicomFrameConverter.h" | |
| 23 | |
| 32 | 24 #include "GeometryToolbox.h" |
| 25 | |
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26 #include <Core/Images/Image.h> |
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27 #include <Core/Images/ImageProcessing.h> |
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28 #include <Core/OrthancException.h> |
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29 #include <Core/Toolbox.h> |
| 0 | 30 |
| 31 namespace OrthancStone | |
| 32 { | |
| 33 void DicomFrameConverter::SetDefaultParameters() | |
| 34 { | |
| 35 isSigned_ = true; | |
| 36 isColor_ = false; | |
| 37 hasRescale_ = false; | |
| 38 rescaleIntercept_ = 0; | |
| 39 rescaleSlope_ = 1; | |
| 40 defaultWindowCenter_ = 128; | |
| 41 defaultWindowWidth_ = 256; | |
| 42 } | |
| 43 | |
| 44 | |
| 45 Orthanc::PixelFormat DicomFrameConverter::GetExpectedPixelFormat() const | |
| 46 { | |
| 47 // TODO Add more checks, e.g. on the number of bytes per value | |
| 48 // (cf. DicomImageInformation.h in Orthanc) | |
| 49 | |
| 50 if (isColor_) | |
| 51 { | |
| 52 return Orthanc::PixelFormat_RGB24; | |
| 53 } | |
| 54 else if (isSigned_) | |
| 55 { | |
| 56 return Orthanc::PixelFormat_SignedGrayscale16; | |
| 57 } | |
| 58 else | |
| 59 { | |
| 60 return Orthanc::PixelFormat_Grayscale16; | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 | |
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65 void DicomFrameConverter::ReadParameters(const Orthanc::DicomMap& dicom) |
| 0 | 66 { |
| 67 SetDefaultParameters(); | |
| 68 | |
| 32 | 69 Vector c, w; |
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70 if (GeometryToolbox::ParseVector(c, dicom, Orthanc::DICOM_TAG_WINDOW_CENTER) && |
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71 GeometryToolbox::ParseVector(w, dicom, Orthanc::DICOM_TAG_WINDOW_WIDTH) && |
| 34 | 72 c.size() > 0 && |
| 73 w.size() > 0) | |
| 0 | 74 { |
| 34 | 75 defaultWindowCenter_ = static_cast<float>(c[0]); |
| 76 defaultWindowWidth_ = static_cast<float>(w[0]); | |
| 0 | 77 } |
| 78 | |
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79 int32_t tmp; |
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80 if (!dicom.ParseInteger32(tmp, Orthanc::DICOM_TAG_PIXEL_REPRESENTATION)) |
| 0 | 81 { |
| 32 | 82 // Type 1 tag, must be present |
| 83 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat); | |
| 84 } | |
| 85 | |
| 86 isSigned_ = (tmp == 1); | |
| 87 | |
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88 if (dicom.ParseFloat(rescaleIntercept_, Orthanc::DICOM_TAG_RESCALE_INTERCEPT) && |
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89 dicom.ParseFloat(rescaleSlope_, Orthanc::DICOM_TAG_RESCALE_SLOPE)) |
| 32 | 90 { |
| 0 | 91 hasRescale_ = true; |
| 92 } | |
| 93 | |
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94 std::string photometric; |
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95 if (dicom.CopyToString(photometric, Orthanc::DICOM_TAG_PHOTOMETRIC_INTERPRETATION, false)) |
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96 { |
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97 photometric = Orthanc::Toolbox::StripSpaces(photometric); |
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98 } |
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99 else |
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100 { |
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101 // Type 1 tag, must be present |
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102 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat); |
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103 } |
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104 |
| 0 | 105 isColor_ = (photometric != "MONOCHROME1" && |
| 106 photometric != "MONOCHROME2"); | |
| 107 } | |
| 108 | |
| 109 | |
| 110 void DicomFrameConverter::ConvertFrame(std::auto_ptr<Orthanc::ImageAccessor>& source) const | |
| 111 { | |
| 112 assert(sizeof(float) == 4); | |
| 113 | |
| 114 if (source.get() == NULL) | |
| 115 { | |
| 116 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 117 } | |
| 118 | |
| 119 Orthanc::PixelFormat sourceFormat = source->GetFormat(); | |
| 120 | |
| 121 if (sourceFormat != GetExpectedPixelFormat()) | |
| 122 { | |
| 123 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
| 124 } | |
| 125 | |
| 126 if (sourceFormat == Orthanc::PixelFormat_RGB24) | |
| 127 { | |
| 128 // No conversion has to be done | |
| 129 return; | |
| 130 } | |
| 131 | |
| 132 assert(sourceFormat == Orthanc::PixelFormat_Grayscale16 || | |
| 133 sourceFormat == Orthanc::PixelFormat_SignedGrayscale16); | |
| 134 | |
| 135 // This is the case of a grayscale frame. Convert it to Float32. | |
| 136 std::auto_ptr<Orthanc::Image> converted(new Orthanc::Image(Orthanc::PixelFormat_Float32, | |
| 137 source->GetWidth(), | |
| 11 | 138 source->GetHeight(), |
| 139 false)); | |
| 0 | 140 Orthanc::ImageProcessing::Convert(*converted, *source); |
| 141 | |
| 142 source.reset(NULL); // We don't need the source frame anymore | |
| 143 | |
| 144 // Correct rescale slope/intercept if need be | |
| 145 if (hasRescale_) | |
| 146 { | |
| 147 for (unsigned int y = 0; y < converted->GetHeight(); y++) | |
| 148 { | |
| 149 float* p = reinterpret_cast<float*>(converted->GetRow(y)); | |
| 150 for (unsigned int x = 0; x < converted->GetWidth(); x++, p++) | |
| 151 { | |
| 152 float value = *p; | |
| 153 | |
| 154 if (hasRescale_) | |
| 155 { | |
| 156 value = value * rescaleSlope_ + rescaleIntercept_; | |
| 157 } | |
| 158 | |
| 159 *p = value; | |
| 160 } | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 source = converted; | |
| 165 } | |
| 166 } |