Mercurial > hg > orthanc-webviewer
annotate Plugin/ParsedDicomImage.cpp @ 94:63396b070632
fix mainline version
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 27 Nov 2015 14:43:38 +0100 |
| parents | 02ccb1677e91 |
| children | a6ba21a083e5 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 5 * | |
| 6 * This program is free software: you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU Affero General Public License | |
| 8 * as published by the Free Software Foundation, either version 3 of | |
| 9 * the License, or (at your option) any later version. | |
| 10 * | |
| 11 * This program is distributed in the hope that it will be useful, but | |
| 12 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 * Affero General Public License for more details. | |
| 15 * | |
| 16 * You should have received a copy of the GNU Affero General Public License | |
| 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 18 **/ | |
| 19 | |
| 20 | |
| 21 #include "ParsedDicomImage.h" | |
| 22 | |
| 26 | 23 #include "../Orthanc/Core/OrthancException.h" |
| 24 #include "../Orthanc/Core/Toolbox.h" | |
| 79 | 25 #include "../Orthanc/Core/Images/ImageProcessing.h" |
| 26 #include "../Orthanc/Core/Images/ImageBuffer.h" | |
| 0 | 27 #include "ViewerToolbox.h" |
| 28 | |
| 29 #include <gdcmImageReader.h> | |
|
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30 #include <gdcmImageApplyLookupTable.h> |
| 0 | 31 #include <gdcmImageChangePlanarConfiguration.h> |
| 32 #include <gdcmImageChangePhotometricInterpretation.h> | |
| 33 #include <boost/lexical_cast.hpp> | |
| 34 #include <boost/math/special_functions/round.hpp> | |
| 35 | |
| 26 | 36 #include "../Orthanc/Resources/ThirdParty/base64/base64.h" |
| 0 | 37 |
| 38 | |
| 39 namespace OrthancPlugins | |
| 40 { | |
| 31 | 41 class ParsedDicomImage::PImpl |
| 0 | 42 { |
| 31 | 43 private: |
| 44 OrthancPluginContext* context_; | |
| 45 std::string instanceId_; | |
| 0 | 46 gdcm::ImageReader reader_; |
|
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47 std::auto_ptr<gdcm::ImageApplyLookupTable> lut_; |
| 0 | 48 std::auto_ptr<gdcm::ImageChangePhotometricInterpretation> photometric_; |
| 49 std::auto_ptr<gdcm::ImageChangePlanarConfiguration> interleaved_; | |
| 50 std::string decoded_; | |
| 79 | 51 std::auto_ptr<ImageReader> png_; |
| 31 | 52 bool isDecoded_; |
| 53 | |
| 54 bool DecodeUsingGdcm() | |
| 55 { | |
|
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56 // Change photometric interpretation or apply LUT, if required |
| 31 | 57 { |
| 58 const gdcm::Image& image = GetImage(); | |
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59 if (image.GetPixelFormat().GetSamplesPerPixel() == 1 && |
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60 image.GetPhotometricInterpretation() == gdcm::PhotometricInterpretation::PALETTE_COLOR) |
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61 { |
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62 lut_.reset(new gdcm::ImageApplyLookupTable()); |
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63 lut_->SetInput(image); |
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64 if (!lut_->Apply()) |
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65 { |
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66 OrthancPluginLogWarning(context_, "GDCM cannot apply the lookup table"); |
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67 return false; |
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68 } |
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69 } |
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70 else if (image.GetPixelFormat().GetSamplesPerPixel() == 1) |
| 31 | 71 { |
| 72 if (image.GetPhotometricInterpretation() != gdcm::PhotometricInterpretation::MONOCHROME1 && | |
| 73 image.GetPhotometricInterpretation() != gdcm::PhotometricInterpretation::MONOCHROME2) | |
| 74 { | |
| 75 photometric_.reset(new gdcm::ImageChangePhotometricInterpretation()); | |
| 76 photometric_->SetInput(image); | |
| 77 photometric_->SetPhotometricInterpretation(gdcm::PhotometricInterpretation::MONOCHROME2); | |
| 78 if (!photometric_->Change() || | |
| 79 GetImage().GetPhotometricInterpretation() != gdcm::PhotometricInterpretation::MONOCHROME2) | |
| 80 { | |
| 81 OrthancPluginLogWarning(context_, "GDCM cannot change the photometric interpretation"); | |
| 82 return false; | |
| 83 } | |
| 84 } | |
| 85 } | |
| 86 else | |
| 87 { | |
| 88 if (image.GetPixelFormat().GetSamplesPerPixel() == 3 && | |
| 89 image.GetPhotometricInterpretation() != gdcm::PhotometricInterpretation::RGB) | |
| 90 { | |
| 91 photometric_.reset(new gdcm::ImageChangePhotometricInterpretation()); | |
| 92 photometric_->SetInput(image); | |
| 93 photometric_->SetPhotometricInterpretation(gdcm::PhotometricInterpretation::RGB); | |
| 94 if (!photometric_->Change() || | |
| 95 GetImage().GetPhotometricInterpretation() != gdcm::PhotometricInterpretation::RGB) | |
| 96 { | |
| 97 OrthancPluginLogWarning(context_, "GDCM cannot change the photometric interpretation"); | |
| 98 return false; | |
| 99 } | |
| 100 } | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 // Possibly convert planar configuration to interleaved | |
| 105 { | |
| 106 const gdcm::Image& image = GetImage(); | |
| 107 if (image.GetPlanarConfiguration() != 0 && | |
| 108 image.GetPixelFormat().GetSamplesPerPixel() != 1) | |
| 109 { | |
| 110 interleaved_.reset(new gdcm::ImageChangePlanarConfiguration()); | |
| 111 interleaved_->SetInput(image); | |
| 112 if (!interleaved_->Change() || | |
| 113 GetImage().GetPlanarConfiguration() != 0) | |
| 114 { | |
| 115 OrthancPluginLogWarning(context_, "GDCM cannot change the planar configuration to interleaved"); | |
| 116 return false; | |
| 117 } | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 // Decode the image to the memory buffer | |
| 122 { | |
| 123 const gdcm::Image& image = GetImage(); | |
| 124 decoded_.resize(image.GetBufferLength()); | |
| 125 | |
| 126 if (decoded_.size() > 0) | |
| 127 { | |
| 128 image.GetBuffer(&decoded_[0]); | |
| 129 } | |
| 130 } | |
| 131 | |
| 132 return true; | |
| 133 } | |
| 134 | |
| 135 | |
| 136 bool DecodeUsingOrthanc() | |
| 137 { | |
| 138 /** | |
| 139 * This is a DICOM image that cannot be properly decoded by | |
| 140 * GDCM. Let's give a try with the Orthanc built-in decoder. | |
| 141 **/ | |
| 142 std::string file = "/instances/" + instanceId_; | |
| 143 | |
| 144 const gdcm::Image& image = GetImage(); | |
| 145 if (image.GetPixelFormat().GetSamplesPerPixel() == 3 || | |
| 146 image.GetPixelFormat().GetSamplesPerPixel() == 4) | |
| 147 { | |
| 148 file += "/preview"; | |
| 149 } | |
| 150 else | |
| 151 { | |
| 152 file += "/image-uint16"; | |
| 153 } | |
| 154 | |
| 155 std::string png; | |
| 156 if (!GetStringFromOrthanc(png, context_, file)) | |
| 157 { | |
| 158 return false; | |
| 159 } | |
| 160 else | |
| 161 { | |
| 162 try | |
| 163 { | |
| 79 | 164 png_.reset(new ImageReader(context_, png, OrthancPluginImageFormat_Png)); |
| 31 | 165 return true; |
| 166 } | |
| 167 catch (Orthanc::OrthancException&) | |
| 168 { | |
| 169 return false; | |
| 170 } | |
| 171 } | |
| 172 } | |
| 173 | |
| 174 | |
| 175 bool Decode() | |
| 176 { | |
| 177 if (isDecoded_) | |
| 178 { | |
| 179 return true; | |
| 180 } | |
| 181 | |
| 182 if (DecodeUsingGdcm()) | |
| 183 { | |
| 184 isDecoded_ = true; | |
| 185 return true; | |
| 186 } | |
| 187 | |
| 188 // GDCM cannot decode this image, try and use Orthanc built-in functions | |
|
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parents:
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diff
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189 lut_.reset(); |
| 31 | 190 photometric_.reset(); |
| 191 interleaved_.reset(); | |
| 192 decoded_.clear(); | |
| 193 | |
| 194 if (DecodeUsingOrthanc()) | |
| 195 { | |
| 196 isDecoded_ = true; | |
| 197 return true; | |
| 198 } | |
| 199 else | |
| 200 { | |
| 201 return false; | |
| 202 } | |
| 203 } | |
| 204 | |
| 205 | |
| 206 public: | |
| 207 PImpl(OrthancPluginContext* context, | |
| 208 const std::string& instanceId) : | |
| 209 context_(context), | |
| 210 instanceId_(instanceId), | |
| 211 isDecoded_(false) | |
| 212 { | |
| 213 } | |
| 214 | |
| 215 | |
| 79 | 216 OrthancPluginContext* GetContext() |
| 217 { | |
| 218 return context_; | |
| 219 } | |
| 220 | |
| 221 | |
| 31 | 222 const gdcm::DataSet& GetDataSet() const |
| 223 { | |
| 224 return reader_.GetFile().GetDataSet(); | |
| 225 } | |
| 226 | |
| 0 | 227 |
| 228 const gdcm::Image& GetImage() const | |
| 229 { | |
| 230 if (interleaved_.get() != NULL) | |
| 231 { | |
| 232 return interleaved_->GetOutput(); | |
| 233 } | |
| 234 | |
|
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235 if (lut_.get() != NULL) |
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236 { |
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237 return lut_->GetOutput(); |
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238 } |
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parents:
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239 |
| 0 | 240 if (photometric_.get() != NULL) |
| 241 { | |
| 242 return photometric_->GetOutput(); | |
| 243 } | |
| 244 | |
| 245 return reader_.GetImage(); | |
| 246 } | |
| 247 | |
| 248 | |
| 31 | 249 void Parse(const std::string& dicom) |
| 250 { | |
| 251 // Prepare a memory stream over the DICOM instance | |
| 252 std::stringstream stream(dicom); | |
| 253 | |
| 254 // Parse the DICOM instance using GDCM | |
| 255 reader_.SetStream(stream); | |
| 256 if (!reader_.Read()) | |
| 257 { | |
| 79 | 258 OrthancPluginLogError(context_, "GDCM cannot extract an image from this DICOM instance"); |
| 259 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
| 31 | 260 } |
| 261 } | |
| 262 | |
| 263 | |
| 264 bool GetAccessor(Orthanc::ImageAccessor& accessor) | |
| 0 | 265 { |
| 31 | 266 if (!Decode()) |
| 267 { | |
| 268 return false; | |
| 269 } | |
| 270 | |
| 79 | 271 if (png_.get() != NULL) |
| 31 | 272 { |
| 273 // The image was decoded using Orthanc's built-in REST API | |
| 79 | 274 accessor = png_->GetAccessor(); |
| 31 | 275 return true; |
| 276 } | |
| 277 | |
| 278 const gdcm::Image& image = GetImage(); | |
| 279 | |
| 280 size_t size = decoded_.size(); | |
| 281 void* buffer = (size ? &decoded_[0] : NULL); | |
| 282 unsigned int height = image.GetRows(); | |
| 283 unsigned int width = image.GetColumns(); | |
| 284 | |
| 285 if (image.GetPixelFormat().GetSamplesPerPixel() == 1 && | |
| 286 (image.GetPhotometricInterpretation() == gdcm::PhotometricInterpretation::MONOCHROME1 || | |
| 287 image.GetPhotometricInterpretation() == gdcm::PhotometricInterpretation::MONOCHROME2)) | |
| 288 { | |
| 289 switch (image.GetPixelFormat()) | |
| 290 { | |
| 291 case gdcm::PixelFormat::UINT16: | |
| 292 accessor.AssignWritable(Orthanc::PixelFormat_Grayscale16, width, height, 2 * width, buffer); | |
| 293 return true; | |
| 294 | |
| 295 case gdcm::PixelFormat::INT16: | |
| 296 accessor.AssignWritable(Orthanc::PixelFormat_SignedGrayscale16, width, height, 2 * width, buffer); | |
| 297 return true; | |
| 298 | |
| 299 case gdcm::PixelFormat::UINT8: | |
| 300 accessor.AssignWritable(Orthanc::PixelFormat_Grayscale8, width, height, width, buffer); | |
| 301 return true; | |
| 302 | |
| 303 default: | |
| 304 return false; | |
| 305 } | |
| 306 } | |
| 307 else if (image.GetPixelFormat().GetSamplesPerPixel() == 3 && | |
| 308 image.GetPhotometricInterpretation() == gdcm::PhotometricInterpretation::RGB) | |
| 309 { | |
| 310 switch (image.GetPixelFormat()) | |
| 311 { | |
| 312 case gdcm::PixelFormat::UINT8: | |
| 313 accessor.AssignWritable(Orthanc::PixelFormat_RGB24, width, height, 3 * width, buffer); | |
| 314 return true; | |
| 315 | |
| 316 default: | |
| 317 return false; | |
| 318 } | |
| 319 } | |
| 320 | |
| 321 return false; | |
| 0 | 322 } |
| 323 }; | |
| 324 | |
| 325 | |
| 326 template <typename TargetType, typename SourceType> | |
| 327 static void ChangeDynamics(Orthanc::ImageAccessor& target, | |
| 328 const Orthanc::ImageAccessor& source, | |
| 329 SourceType source1, TargetType target1, | |
| 330 SourceType source2, TargetType target2) | |
| 331 { | |
| 332 if (source.GetWidth() != target.GetWidth() || | |
| 333 source.GetHeight() != target.GetHeight()) | |
| 334 { | |
| 335 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageSize); | |
| 336 } | |
| 337 | |
| 338 float scale = static_cast<float>(target2 - target1) / static_cast<float>(source2 - source1); | |
| 339 float offset = static_cast<float>(target1) - scale * static_cast<float>(source1); | |
| 340 | |
| 341 const float minValue = static_cast<float>(std::numeric_limits<TargetType>::min()); | |
| 342 const float maxValue = static_cast<float>(std::numeric_limits<TargetType>::max()); | |
| 343 | |
| 344 for (unsigned int y = 0; y < source.GetHeight(); y++) | |
| 345 { | |
| 346 const SourceType* p = reinterpret_cast<const SourceType*>(source.GetConstRow(y)); | |
| 347 TargetType* q = reinterpret_cast<TargetType*>(target.GetRow(y)); | |
| 348 | |
| 349 for (unsigned int x = 0; x < source.GetWidth(); x++, p++, q++) | |
| 350 { | |
| 351 float v = (scale * static_cast<float>(*p)) + offset; | |
| 352 | |
| 353 if (v > maxValue) | |
| 354 { | |
| 355 *q = std::numeric_limits<TargetType>::max(); | |
| 356 } | |
| 357 else if (v < minValue) | |
| 358 { | |
| 359 *q = std::numeric_limits<TargetType>::min(); | |
| 360 } | |
| 361 else | |
| 362 { | |
| 363 *q = static_cast<TargetType>(boost::math::iround(v)); | |
| 364 } | |
| 365 } | |
| 366 } | |
| 367 } | |
| 368 | |
| 369 | |
| 31 | 370 ParsedDicomImage::ParsedDicomImage(OrthancPluginContext* context, |
| 371 const std::string& instanceId) : | |
| 372 pimpl_(new PImpl(context, instanceId)) | |
| 0 | 373 { |
| 31 | 374 std::string file = "/instances/" + instanceId + "/file"; |
| 0 | 375 |
| 31 | 376 std::string dicom; |
| 377 if (!GetStringFromOrthanc(dicom, context, file)) | |
| 0 | 378 { |
| 31 | 379 throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource); |
| 0 | 380 } |
| 381 | |
| 31 | 382 pimpl_->Parse(dicom); |
| 0 | 383 } |
| 384 | |
| 385 | |
| 386 bool ParsedDicomImage::GetTag(std::string& result, | |
| 387 uint16_t group, | |
| 388 uint16_t element, | |
| 389 bool stripSpaces) | |
| 390 { | |
| 391 const gdcm::Tag tag(group, element); | |
| 392 | |
| 393 if (pimpl_->GetDataSet().FindDataElement(tag)) | |
| 394 { | |
| 395 const gdcm::ByteValue* value = pimpl_->GetDataSet().GetDataElement(tag).GetByteValue(); | |
| 396 if (value) | |
| 397 { | |
| 398 result = std::string(value->GetPointer(), value->GetLength()); | |
| 399 | |
| 400 if (stripSpaces) | |
| 401 { | |
| 402 result = Orthanc::Toolbox::StripSpaces(result); | |
| 403 } | |
| 404 | |
| 405 return true; | |
| 406 } | |
| 407 } | |
| 408 | |
| 409 return false; | |
| 410 } | |
| 411 | |
| 412 | |
| 413 bool ParsedDicomImage::GetCornerstoneMetadata(Json::Value& json) | |
| 414 { | |
| 415 using namespace Orthanc; | |
| 416 | |
| 417 ImageAccessor accessor; | |
| 31 | 418 if (!pimpl_->GetAccessor(accessor)) |
| 0 | 419 { |
| 420 return false; | |
| 421 } | |
| 422 | |
| 423 float windowCenter, windowWidth; | |
| 424 | |
| 425 switch (accessor.GetFormat()) | |
| 426 { | |
| 427 case PixelFormat_Grayscale8: | |
| 428 case PixelFormat_Grayscale16: | |
| 429 case PixelFormat_SignedGrayscale16: | |
| 430 { | |
| 431 int64_t a, b; | |
| 432 Orthanc::ImageProcessing::GetMinMaxValue(a, b, accessor); | |
| 433 json["minPixelValue"] = (a < 0 ? static_cast<int32_t>(a) : 0); | |
| 434 json["maxPixelValue"] = (b > 0 ? static_cast<int32_t>(b) : 1); | |
| 435 json["color"] = false; | |
| 436 | |
| 437 windowCenter = static_cast<float>(a + b) / 2.0f; | |
| 438 | |
| 439 if (a == b) | |
| 440 { | |
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441 windowWidth = 256.0f; // Arbitrary value |
| 0 | 442 } |
| 443 else | |
| 444 { | |
| 445 windowWidth = static_cast<float>(b - a) / 2.0f; | |
| 446 } | |
| 447 | |
| 448 break; | |
| 449 } | |
| 450 | |
| 451 case PixelFormat_RGB24: | |
| 452 json["minPixelValue"] = 0; | |
| 453 json["maxPixelValue"] = 255; | |
| 454 json["color"] = true; | |
| 455 windowCenter = 127.5f; | |
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456 windowWidth = 256.0f; |
| 0 | 457 break; |
| 458 | |
| 459 default: | |
| 460 return false; | |
| 461 } | |
| 462 | |
| 463 const gdcm::Image& image = pimpl_->GetImage(); | |
| 464 json["slope"] = image.GetSlope(); | |
| 465 json["intercept"] = image.GetIntercept(); | |
| 466 json["rows"] = image.GetRows(); | |
| 467 json["columns"] = image.GetColumns(); | |
| 468 json["height"] = image.GetRows(); | |
| 469 json["width"] = image.GetColumns(); | |
| 470 json["columnPixelSpacing"] = image.GetSpacing(1); | |
| 471 json["rowPixelSpacing"] = image.GetSpacing(0); | |
| 472 | |
| 473 json["windowCenter"] = windowCenter * image.GetSlope() + image.GetIntercept(); | |
| 474 json["windowWidth"] = windowWidth * image.GetSlope(); | |
| 475 | |
| 476 try | |
| 477 { | |
| 478 std::string width, center; | |
| 479 if (GetTag(center, 0x0028, 0x1050 /*DICOM_TAG_WINDOW_CENTER*/) && | |
| 480 GetTag(width, 0x0028, 0x1051 /*DICOM_TAG_WINDOW_WIDTH*/)) | |
| 481 { | |
| 482 float a = boost::lexical_cast<float>(width); | |
| 483 float b = boost::lexical_cast<float>(center); | |
| 484 json["windowWidth"] = a; | |
| 485 json["windowCenter"] = b; | |
| 486 } | |
| 487 } | |
| 488 catch (boost::bad_lexical_cast&) | |
| 489 { | |
| 490 } | |
| 491 | |
| 492 return true; | |
| 493 } | |
| 494 | |
| 495 | |
| 496 bool ParsedDicomImage::EncodeUsingDeflate(Json::Value& result, | |
| 497 uint8_t compressionLevel /* between 0 and 9 */) | |
| 498 { | |
| 499 using namespace Orthanc; | |
| 500 | |
| 501 ImageAccessor accessor; | |
| 31 | 502 if (!pimpl_->GetAccessor(accessor)) |
| 0 | 503 { |
| 504 return false; | |
| 505 } | |
| 506 | |
| 507 result = Json::objectValue; | |
| 508 result["Orthanc"] = Json::objectValue; | |
| 509 if (!GetCornerstoneMetadata(result)) | |
| 510 { | |
| 511 return false; | |
| 512 } | |
| 513 | |
| 514 ImageBuffer buffer; | |
| 515 buffer.SetMinimalPitchForced(true); | |
| 516 | |
| 517 ImageAccessor converted; | |
| 518 | |
| 519 | |
| 520 switch (accessor.GetFormat()) | |
| 521 { | |
| 522 case Orthanc::PixelFormat_RGB24: | |
| 523 converted = accessor; | |
| 524 break; | |
| 525 | |
| 526 case Orthanc::PixelFormat_Grayscale8: | |
| 527 case Orthanc::PixelFormat_Grayscale16: | |
| 528 buffer.SetFormat(Orthanc::PixelFormat_SignedGrayscale16); | |
| 529 buffer.SetWidth(accessor.GetWidth()); | |
| 530 buffer.SetHeight(accessor.GetHeight()); | |
| 531 converted = buffer.GetAccessor(); | |
| 532 ImageProcessing::Convert(converted, accessor); | |
| 533 break; | |
| 534 | |
| 535 case Orthanc::PixelFormat_SignedGrayscale16: | |
| 536 converted = accessor; | |
| 537 break; | |
| 538 | |
| 539 default: | |
| 540 // Unsupported pixel format | |
| 541 return false; | |
| 542 } | |
| 543 | |
| 544 // Sanity check: The pitch must be minimal | |
| 545 assert(converted.GetSize() == converted.GetWidth() * converted.GetHeight() * | |
| 546 GetBytesPerPixel(converted.GetFormat())); | |
| 547 result["Orthanc"]["Compression"] = "Deflate"; | |
| 548 result["sizeInBytes"] = converted.GetSize(); | |
| 549 | |
| 550 std::string z; | |
| 79 | 551 CompressUsingDeflate(z, pimpl_->GetContext(), converted.GetConstBuffer(), converted.GetSize()); |
| 0 | 552 |
| 553 result["Orthanc"]["PixelData"] = base64_encode(z); | |
| 554 | |
| 555 return true; | |
| 556 } | |
| 557 | |
| 558 | |
| 559 | |
| 560 bool ParsedDicomImage::EncodeUsingJpeg(Json::Value& result, | |
| 561 uint8_t quality /* between 0 and 100 */) | |
| 562 { | |
| 563 using namespace Orthanc; | |
| 564 | |
| 565 ImageAccessor accessor; | |
| 31 | 566 if (!pimpl_->GetAccessor(accessor)) |
| 0 | 567 { |
| 568 return false; | |
| 569 } | |
| 570 | |
| 571 result = Json::objectValue; | |
| 572 result["Orthanc"] = Json::objectValue; | |
| 573 GetCornerstoneMetadata(result); | |
| 574 | |
| 575 ImageBuffer buffer; | |
| 576 buffer.SetMinimalPitchForced(true); | |
| 577 | |
| 578 ImageAccessor converted; | |
| 579 | |
| 580 if (accessor.GetFormat() == Orthanc::PixelFormat_Grayscale8 || | |
| 581 accessor.GetFormat() == Orthanc::PixelFormat_RGB24) | |
| 582 { | |
| 583 result["Orthanc"]["Stretched"] = false; | |
| 584 converted = accessor; | |
| 585 } | |
| 586 else if (accessor.GetFormat() == Orthanc::PixelFormat_Grayscale16 || | |
| 587 accessor.GetFormat() == Orthanc::PixelFormat_SignedGrayscale16) | |
| 588 { | |
| 589 result["Orthanc"]["Stretched"] = true; | |
| 590 buffer.SetFormat(Orthanc::PixelFormat_Grayscale8); | |
| 591 buffer.SetWidth(accessor.GetWidth()); | |
| 592 buffer.SetHeight(accessor.GetHeight()); | |
| 593 converted = buffer.GetAccessor(); | |
| 594 | |
| 595 int64_t a, b; | |
| 596 Orthanc::ImageProcessing::GetMinMaxValue(a, b, accessor); | |
| 597 result["Orthanc"]["StretchLow"] = static_cast<int32_t>(a); | |
| 598 result["Orthanc"]["StretchHigh"] = static_cast<int32_t>(b); | |
| 599 | |
| 600 if (accessor.GetFormat() == Orthanc::PixelFormat_Grayscale16) | |
| 601 { | |
| 602 ChangeDynamics<uint8_t, uint16_t>(converted, accessor, a, 0, b, 255); | |
| 603 } | |
| 604 else | |
| 605 { | |
| 606 ChangeDynamics<uint8_t, int16_t>(converted, accessor, a, 0, b, 255); | |
| 607 } | |
| 608 } | |
| 609 else | |
| 610 { | |
| 611 return false; | |
| 612 } | |
| 613 | |
| 614 result["Orthanc"]["Compression"] = "Jpeg"; | |
| 615 result["sizeInBytes"] = converted.GetSize(); | |
| 616 | |
| 617 std::string jpeg; | |
| 79 | 618 WriteJpegToMemory(jpeg, pimpl_->GetContext(), converted, quality); |
| 619 | |
| 0 | 620 result["Orthanc"]["PixelData"] = base64_encode(jpeg); |
| 621 return true; | |
| 622 } | |
| 26 | 623 } |