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annotate Framework/Scene2D/LookupTableTextureSceneLayer.cpp @ 769:4ba8892870a2

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improved interface for lookup tables
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 23 May 2019 20:37:19 +0200
parents 55411e7da2f7
children 11fc84650e4b
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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) 2017-2019 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "LookupTableTextureSceneLayer.h"
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23
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24 #include <Core/Images/Image.h>
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25 #include <Core/Images/ImageProcessing.h>
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26 #include <Core/OrthancException.h>
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27
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28 namespace OrthancStone
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29 {
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30 static void StringToVector(std::vector<uint8_t>& target,
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31 const std::string& source)
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32 {
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33 target.resize(source.size());
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34
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35 for (size_t i = 0; i < source.size(); i++)
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36 {
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37 target[i] = source[i];
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38 }
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39 }
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41
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42 LookupTableTextureSceneLayer::LookupTableTextureSceneLayer(const Orthanc::ImageAccessor& texture)
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43 {
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44 {
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45 std::auto_ptr<Orthanc::ImageAccessor> t(
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46 new Orthanc::Image(Orthanc::PixelFormat_Float32,
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47 texture.GetWidth(),
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48 texture.GetHeight(),
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49 false));
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50
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51 Orthanc::ImageProcessing::Convert(*t, texture);
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52 SetTexture(t.release());
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53 }
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54
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55 SetLookupTableGrayscale();
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56 SetRange(0, 1);
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57 }
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58
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59
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60 void LookupTableTextureSceneLayer::SetLookupTableGrayscale()
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61 {
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62 std::vector<uint8_t> rgb(3 * 256);
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63
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64 for (size_t i = 0; i < 256; i++)
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65 {
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66 rgb[3 * i] = i;
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67 rgb[3 * i + 1] = i;
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68 rgb[3 * i + 2] = i;
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69 }
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70
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71 SetLookupTableRgb(rgb);
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72 }
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74
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75 void LookupTableTextureSceneLayer::SetLookupTableRgb(const std::vector<uint8_t>& lut)
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76 {
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77 if (lut.size() != 3 * 256)
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78 {
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79 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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80 }
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81
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82 lut_.resize(4 * 256);
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83
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84 for (size_t i = 0; i < 256; i++)
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85 {
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86 // Premultiplied alpha
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87
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88 if (i == 0)
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89 {
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90 // Make zero transparent
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91 lut_[4 * i] = 0; // R
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92 lut_[4 * i + 1] = 0; // G
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93 lut_[4 * i + 2] = 0; // B
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94 lut_[4 * i + 3] = 0; // A
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95 }
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96 else
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97 {
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98 float a = static_cast<float>(i) / 255.0f;
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99
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100 float r = static_cast<float>(lut[3 * i]) * a;
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101 float g = static_cast<float>(lut[3 * i + 1]) * a;
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102 float b = static_cast<float>(lut[3 * i + 2]) * a;
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103
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104 lut_[4 * i] = static_cast<uint8_t>(std::floor(r));
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105 lut_[4 * i + 1] = static_cast<uint8_t>(std::floor(g));
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106 lut_[4 * i + 2] = static_cast<uint8_t>(std::floor(b));
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107 lut_[4 * i + 3] = static_cast<uint8_t>(std::floor(a * 255.0f));
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108 }
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109 }
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110
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111 IncrementRevision();
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112 }
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113
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114
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115 void LookupTableTextureSceneLayer::SetLookupTable(const std::vector<uint8_t>& lut)
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116 {
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117 if (lut.size() == 4 * 256)
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118 {
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119 lut_ = lut;
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120 IncrementRevision();
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121 }
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122 else if (lut.size() == 3 * 256)
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123 {
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124 SetLookupTableRgb(lut);
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125 }
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126 else
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127 {
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128 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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129 }
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130 }
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131
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132
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133 void LookupTableTextureSceneLayer::SetLookupTable(const std::string& lut)
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134 {
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135 std::vector<uint8_t> tmp;
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136 StringToVector(tmp, lut);
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137 SetLookupTable(tmp);
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138 }
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139
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140
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141 void LookupTableTextureSceneLayer::SetRange(float minValue,
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142 float maxValue)
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143 {
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144 if (minValue > maxValue)
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145 {
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146 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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147 }
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148 else
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149 {
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150 minValue_ = minValue;
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151 maxValue_ = maxValue;
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152 IncrementRevision();
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153 }
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154 }
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155
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156
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157 void LookupTableTextureSceneLayer::FitRange()
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158 {
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159 Orthanc::ImageProcessing::GetMinMaxFloatValue(minValue_, maxValue_, GetTexture());
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160 assert(minValue_ <= maxValue_);
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161
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162 IncrementRevision();
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163 }
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164
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165
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166 ISceneLayer* LookupTableTextureSceneLayer::Clone() const
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167 {
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168 std::auto_ptr<LookupTableTextureSceneLayer> cloned
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169 (new LookupTableTextureSceneLayer(GetTexture()));
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170
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171 cloned->CopyParameters(*this);
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172 cloned->minValue_ = minValue_;
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173 cloned->maxValue_ = maxValue_;
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174 cloned->lut_ = lut_;
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175
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176 return cloned.release();
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177 }
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178 }