annotate OrthancStone/Sources/Oracle/GetOrthancWebViewerJpegCommand.cpp @ 2089:63d77859edee dicom-sr

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Nov 2023 19:30:44 +0100
parents 07964689cb0b
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1 /**
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2 * Stone of Orthanc
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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 Lesser 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 * Lesser 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 Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #include "GetOrthancWebViewerJpegCommand.h"
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25
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26 #include "../Toolbox/LinearAlgebra.h"
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27
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28 #include <Images/Image.h>
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29 #include <Images/ImageProcessing.h>
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30 #include <Images/JpegReader.h>
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31 #include <OrthancException.h>
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32 #include <Toolbox.h>
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33
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34 #include <json/value.h>
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35
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36 namespace OrthancStone
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37 {
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38 GetOrthancWebViewerJpegCommand::GetOrthancWebViewerJpegCommand() :
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39 frame_(0),
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40 quality_(95),
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41 timeout_(600),
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42 expectedFormat_(Orthanc::PixelFormat_Grayscale8)
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43 {
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44 }
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47 void GetOrthancWebViewerJpegCommand::SetQuality(unsigned int quality)
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48 {
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49 if (quality == 0 ||
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50 quality > 100)
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51 {
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52 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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53 }
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54 else
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55 {
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56 quality_ = quality;
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57 }
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58 }
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59
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60
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61 std::string GetOrthancWebViewerJpegCommand::GetUri() const
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62 {
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63 return ("/web-viewer/instances/jpeg" + boost::lexical_cast<std::string>(quality_) +
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64 "-" + instanceId_ + "_" + boost::lexical_cast<std::string>(frame_));
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65 }
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66
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67
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68 void GetOrthancWebViewerJpegCommand::ProcessHttpAnswer(boost::weak_ptr<IObserver> receiver,
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69 IMessageEmitter& emitter,
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70 const std::string& answer) const
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71 {
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72 // This code comes from older "OrthancSlicesLoader::ParseSliceImageJpeg()"
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73
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74 Json::Value encoded;
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75 if (!Orthanc::Toolbox::ReadJson(encoded, answer))
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76 {
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77 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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78 }
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79
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80 if (encoded.type() != Json::objectValue ||
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81 !encoded.isMember("Orthanc") ||
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82 encoded["Orthanc"].type() != Json::objectValue)
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83 {
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84 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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85 }
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86
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87 const Json::Value& info = encoded["Orthanc"];
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88 if (!info.isMember("PixelData") ||
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89 !info.isMember("Stretched") ||
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90 !info.isMember("Compression") ||
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91 info["Compression"].type() != Json::stringValue ||
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92 info["PixelData"].type() != Json::stringValue ||
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93 info["Stretched"].type() != Json::booleanValue ||
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94 info["Compression"].asString() != "Jpeg")
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95 {
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96 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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97 }
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98
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99 bool isSigned = false;
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100 bool isStretched = info["Stretched"].asBool();
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101
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102 if (info.isMember("IsSigned"))
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103 {
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104 if (info["IsSigned"].type() != Json::booleanValue)
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105 {
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106 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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107 }
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108 else
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109 {
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110 isSigned = info["IsSigned"].asBool();
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111 }
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112 }
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113
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114 std::unique_ptr<Orthanc::ImageAccessor> reader;
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115
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116 {
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117 std::string jpeg;
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118 Orthanc::Toolbox::DecodeBase64(jpeg, info["PixelData"].asString());
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119
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120 reader.reset(new Orthanc::JpegReader);
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121 dynamic_cast<Orthanc::JpegReader&>(*reader).ReadFromMemory(jpeg);
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122 }
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123
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124 if (reader->GetFormat() == Orthanc::PixelFormat_RGB24) // This is a color image
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125 {
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126 if (expectedFormat_ != Orthanc::PixelFormat_RGB24)
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127 {
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128 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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129 }
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130
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131 if (isSigned || isStretched)
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132 {
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133 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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134 }
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135 else
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136 {
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137 SuccessMessage message(*this, *reader);
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138 emitter.EmitMessage(receiver, message);
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139 return;
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140 }
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141 }
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142
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143 if (reader->GetFormat() != Orthanc::PixelFormat_Grayscale8)
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144 {
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145 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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146 }
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147
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148 if (!isStretched)
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149 {
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150 if (expectedFormat_ != reader->GetFormat())
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151 {
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152 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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153 }
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154 else
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155 {
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156 SuccessMessage message(*this, *reader);
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157 emitter.EmitMessage(receiver, message);
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158 return;
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159 }
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160 }
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161
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162 int32_t stretchLow = 0;
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163 int32_t stretchHigh = 0;
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164
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165 if (!info.isMember("StretchLow") ||
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166 !info.isMember("StretchHigh") ||
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167 info["StretchLow"].type() != Json::intValue ||
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168 info["StretchHigh"].type() != Json::intValue)
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169 {
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170 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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171 }
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172
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173 stretchLow = info["StretchLow"].asInt();
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174 stretchHigh = info["StretchHigh"].asInt();
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175
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176 if (stretchLow < -32768 ||
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177 stretchHigh > 65535 ||
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178 (stretchLow < 0 && stretchHigh > 32767))
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179 {
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180 // This range cannot be represented with a uint16_t or an int16_t
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181 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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182 }
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183
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184 // Decode a grayscale JPEG 8bpp image coming from the Web viewer
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185 std::unique_ptr<Orthanc::ImageAccessor> image
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186 (new Orthanc::Image(expectedFormat_, reader->GetWidth(), reader->GetHeight(), false));
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187
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188 Orthanc::ImageProcessing::Convert(*image, *reader);
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189 reader.reset();
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190
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191 float scaling = static_cast<float>(stretchHigh - stretchLow) / 255.0f;
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192
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193 if (!LinearAlgebra::IsCloseToZero(scaling))
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194 {
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195 float offset = static_cast<float>(stretchLow) / scaling;
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196 Orthanc::ImageProcessing::ShiftScale(*image, offset, scaling, true);
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197 }
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198
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199 SuccessMessage message(*this, *image);
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200 emitter.EmitMessage(receiver, message);
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201 }
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202 }