Mercurial > hg > orthanc-webviewer
annotate Plugin/ParsedDicomImage.cpp @ 85:581937911d14
merge
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 13 Oct 2015 17:51:49 +0200 |
| parents | abdde1dfb3eb |
| children | 02ccb1677e91 |
| 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> | |
| 30 #include <gdcmImageChangePlanarConfiguration.h> | |
| 31 #include <gdcmImageChangePhotometricInterpretation.h> | |
| 32 #include <boost/lexical_cast.hpp> | |
| 33 #include <boost/math/special_functions/round.hpp> | |
| 34 | |
| 26 | 35 #include "../Orthanc/Resources/ThirdParty/base64/base64.h" |
| 0 | 36 |
| 37 | |
| 38 namespace OrthancPlugins | |
| 39 { | |
| 31 | 40 class ParsedDicomImage::PImpl |
| 0 | 41 { |
| 31 | 42 private: |
| 43 OrthancPluginContext* context_; | |
| 44 std::string instanceId_; | |
| 0 | 45 gdcm::ImageReader reader_; |
| 46 std::auto_ptr<gdcm::ImageChangePhotometricInterpretation> photometric_; | |
| 47 std::auto_ptr<gdcm::ImageChangePlanarConfiguration> interleaved_; | |
| 48 std::string decoded_; | |
| 79 | 49 std::auto_ptr<ImageReader> png_; |
| 31 | 50 bool isDecoded_; |
| 51 | |
| 52 bool DecodeUsingGdcm() | |
| 53 { | |
| 54 // Change photometric interpretation, if required | |
| 55 { | |
| 56 const gdcm::Image& image = GetImage(); | |
| 57 if (image.GetPixelFormat().GetSamplesPerPixel() == 1) | |
| 58 { | |
| 59 if (image.GetPhotometricInterpretation() != gdcm::PhotometricInterpretation::MONOCHROME1 && | |
| 60 image.GetPhotometricInterpretation() != gdcm::PhotometricInterpretation::MONOCHROME2) | |
| 61 { | |
| 62 photometric_.reset(new gdcm::ImageChangePhotometricInterpretation()); | |
| 63 photometric_->SetInput(image); | |
| 64 photometric_->SetPhotometricInterpretation(gdcm::PhotometricInterpretation::MONOCHROME2); | |
| 65 if (!photometric_->Change() || | |
| 66 GetImage().GetPhotometricInterpretation() != gdcm::PhotometricInterpretation::MONOCHROME2) | |
| 67 { | |
| 68 OrthancPluginLogWarning(context_, "GDCM cannot change the photometric interpretation"); | |
| 69 return false; | |
| 70 } | |
| 71 } | |
| 72 } | |
| 73 else | |
| 74 { | |
| 75 if (image.GetPixelFormat().GetSamplesPerPixel() == 3 && | |
| 76 image.GetPhotometricInterpretation() != gdcm::PhotometricInterpretation::RGB) | |
| 77 { | |
| 78 photometric_.reset(new gdcm::ImageChangePhotometricInterpretation()); | |
| 79 photometric_->SetInput(image); | |
| 80 photometric_->SetPhotometricInterpretation(gdcm::PhotometricInterpretation::RGB); | |
| 81 if (!photometric_->Change() || | |
| 82 GetImage().GetPhotometricInterpretation() != gdcm::PhotometricInterpretation::RGB) | |
| 83 { | |
| 84 OrthancPluginLogWarning(context_, "GDCM cannot change the photometric interpretation"); | |
| 85 return false; | |
| 86 } | |
| 87 } | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 // Possibly convert planar configuration to interleaved | |
| 92 { | |
| 93 const gdcm::Image& image = GetImage(); | |
| 94 if (image.GetPlanarConfiguration() != 0 && | |
| 95 image.GetPixelFormat().GetSamplesPerPixel() != 1) | |
| 96 { | |
| 97 interleaved_.reset(new gdcm::ImageChangePlanarConfiguration()); | |
| 98 interleaved_->SetInput(image); | |
| 99 if (!interleaved_->Change() || | |
| 100 GetImage().GetPlanarConfiguration() != 0) | |
| 101 { | |
| 102 OrthancPluginLogWarning(context_, "GDCM cannot change the planar configuration to interleaved"); | |
| 103 return false; | |
| 104 } | |
| 105 } | |
| 106 } | |
| 107 | |
| 108 // Decode the image to the memory buffer | |
| 109 { | |
| 110 const gdcm::Image& image = GetImage(); | |
| 111 decoded_.resize(image.GetBufferLength()); | |
| 112 | |
| 113 if (decoded_.size() > 0) | |
| 114 { | |
| 115 image.GetBuffer(&decoded_[0]); | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 return true; | |
| 120 } | |
| 121 | |
| 122 | |
| 123 bool DecodeUsingOrthanc() | |
| 124 { | |
| 125 /** | |
| 126 * This is a DICOM image that cannot be properly decoded by | |
| 127 * GDCM. Let's give a try with the Orthanc built-in decoder. | |
| 128 **/ | |
| 129 std::string file = "/instances/" + instanceId_; | |
| 130 | |
| 131 const gdcm::Image& image = GetImage(); | |
| 132 if (image.GetPixelFormat().GetSamplesPerPixel() == 3 || | |
| 133 image.GetPixelFormat().GetSamplesPerPixel() == 4) | |
| 134 { | |
| 135 file += "/preview"; | |
| 136 } | |
| 137 else | |
| 138 { | |
| 139 file += "/image-uint16"; | |
| 140 } | |
| 141 | |
| 142 std::string png; | |
| 143 if (!GetStringFromOrthanc(png, context_, file)) | |
| 144 { | |
| 145 return false; | |
| 146 } | |
| 147 else | |
| 148 { | |
| 149 try | |
| 150 { | |
| 79 | 151 png_.reset(new ImageReader(context_, png, OrthancPluginImageFormat_Png)); |
| 31 | 152 return true; |
| 153 } | |
| 154 catch (Orthanc::OrthancException&) | |
| 155 { | |
| 156 return false; | |
| 157 } | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 | |
| 162 bool Decode() | |
| 163 { | |
| 164 if (isDecoded_) | |
| 165 { | |
| 166 return true; | |
| 167 } | |
| 168 | |
| 169 if (DecodeUsingGdcm()) | |
| 170 { | |
| 171 isDecoded_ = true; | |
| 172 return true; | |
| 173 } | |
| 174 | |
| 175 // GDCM cannot decode this image, try and use Orthanc built-in functions | |
| 176 photometric_.reset(); | |
| 177 interleaved_.reset(); | |
| 178 decoded_.clear(); | |
| 179 | |
| 180 if (DecodeUsingOrthanc()) | |
| 181 { | |
| 182 isDecoded_ = true; | |
| 183 return true; | |
| 184 } | |
| 185 else | |
| 186 { | |
| 187 return false; | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 | |
| 192 public: | |
| 193 PImpl(OrthancPluginContext* context, | |
| 194 const std::string& instanceId) : | |
| 195 context_(context), | |
| 196 instanceId_(instanceId), | |
| 197 isDecoded_(false) | |
| 198 { | |
| 199 } | |
| 200 | |
| 201 | |
| 79 | 202 OrthancPluginContext* GetContext() |
| 203 { | |
| 204 return context_; | |
| 205 } | |
| 206 | |
| 207 | |
| 31 | 208 const gdcm::DataSet& GetDataSet() const |
| 209 { | |
| 210 return reader_.GetFile().GetDataSet(); | |
| 211 } | |
| 212 | |
| 0 | 213 |
| 214 const gdcm::Image& GetImage() const | |
| 215 { | |
| 216 if (interleaved_.get() != NULL) | |
| 217 { | |
| 218 return interleaved_->GetOutput(); | |
| 219 } | |
| 220 | |
| 221 if (photometric_.get() != NULL) | |
| 222 { | |
| 223 return photometric_->GetOutput(); | |
| 224 } | |
| 225 | |
| 226 return reader_.GetImage(); | |
| 227 } | |
| 228 | |
| 229 | |
| 31 | 230 void Parse(const std::string& dicom) |
| 231 { | |
| 232 // Prepare a memory stream over the DICOM instance | |
| 233 std::stringstream stream(dicom); | |
| 234 | |
| 235 // Parse the DICOM instance using GDCM | |
| 236 reader_.SetStream(stream); | |
| 237 if (!reader_.Read()) | |
| 238 { | |
| 79 | 239 OrthancPluginLogError(context_, "GDCM cannot extract an image from this DICOM instance"); |
| 240 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat); | |
| 31 | 241 } |
| 242 } | |
| 243 | |
| 244 | |
| 245 bool GetAccessor(Orthanc::ImageAccessor& accessor) | |
| 0 | 246 { |
| 31 | 247 if (!Decode()) |
| 248 { | |
| 249 return false; | |
| 250 } | |
| 251 | |
| 79 | 252 if (png_.get() != NULL) |
| 31 | 253 { |
| 254 // The image was decoded using Orthanc's built-in REST API | |
| 79 | 255 accessor = png_->GetAccessor(); |
| 31 | 256 return true; |
| 257 } | |
| 258 | |
| 259 const gdcm::Image& image = GetImage(); | |
| 260 | |
| 261 size_t size = decoded_.size(); | |
| 262 void* buffer = (size ? &decoded_[0] : NULL); | |
| 263 unsigned int height = image.GetRows(); | |
| 264 unsigned int width = image.GetColumns(); | |
| 265 | |
| 266 if (image.GetPixelFormat().GetSamplesPerPixel() == 1 && | |
| 267 (image.GetPhotometricInterpretation() == gdcm::PhotometricInterpretation::MONOCHROME1 || | |
| 268 image.GetPhotometricInterpretation() == gdcm::PhotometricInterpretation::MONOCHROME2)) | |
| 269 { | |
| 270 switch (image.GetPixelFormat()) | |
| 271 { | |
| 272 case gdcm::PixelFormat::UINT16: | |
| 273 accessor.AssignWritable(Orthanc::PixelFormat_Grayscale16, width, height, 2 * width, buffer); | |
| 274 return true; | |
| 275 | |
| 276 case gdcm::PixelFormat::INT16: | |
| 277 accessor.AssignWritable(Orthanc::PixelFormat_SignedGrayscale16, width, height, 2 * width, buffer); | |
| 278 return true; | |
| 279 | |
| 280 case gdcm::PixelFormat::UINT8: | |
| 281 accessor.AssignWritable(Orthanc::PixelFormat_Grayscale8, width, height, width, buffer); | |
| 282 return true; | |
| 283 | |
| 284 default: | |
| 285 return false; | |
| 286 } | |
| 287 } | |
| 288 else if (image.GetPixelFormat().GetSamplesPerPixel() == 3 && | |
| 289 image.GetPhotometricInterpretation() == gdcm::PhotometricInterpretation::RGB) | |
| 290 { | |
| 291 switch (image.GetPixelFormat()) | |
| 292 { | |
| 293 case gdcm::PixelFormat::UINT8: | |
| 294 accessor.AssignWritable(Orthanc::PixelFormat_RGB24, width, height, 3 * width, buffer); | |
| 295 return true; | |
| 296 | |
| 297 default: | |
| 298 return false; | |
| 299 } | |
| 300 } | |
| 301 | |
| 302 return false; | |
| 0 | 303 } |
| 304 }; | |
| 305 | |
| 306 | |
| 307 template <typename TargetType, typename SourceType> | |
| 308 static void ChangeDynamics(Orthanc::ImageAccessor& target, | |
| 309 const Orthanc::ImageAccessor& source, | |
| 310 SourceType source1, TargetType target1, | |
| 311 SourceType source2, TargetType target2) | |
| 312 { | |
| 313 if (source.GetWidth() != target.GetWidth() || | |
| 314 source.GetHeight() != target.GetHeight()) | |
| 315 { | |
| 316 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageSize); | |
| 317 } | |
| 318 | |
| 319 float scale = static_cast<float>(target2 - target1) / static_cast<float>(source2 - source1); | |
| 320 float offset = static_cast<float>(target1) - scale * static_cast<float>(source1); | |
| 321 | |
| 322 const float minValue = static_cast<float>(std::numeric_limits<TargetType>::min()); | |
| 323 const float maxValue = static_cast<float>(std::numeric_limits<TargetType>::max()); | |
| 324 | |
| 325 for (unsigned int y = 0; y < source.GetHeight(); y++) | |
| 326 { | |
| 327 const SourceType* p = reinterpret_cast<const SourceType*>(source.GetConstRow(y)); | |
| 328 TargetType* q = reinterpret_cast<TargetType*>(target.GetRow(y)); | |
| 329 | |
| 330 for (unsigned int x = 0; x < source.GetWidth(); x++, p++, q++) | |
| 331 { | |
| 332 float v = (scale * static_cast<float>(*p)) + offset; | |
| 333 | |
| 334 if (v > maxValue) | |
| 335 { | |
| 336 *q = std::numeric_limits<TargetType>::max(); | |
| 337 } | |
| 338 else if (v < minValue) | |
| 339 { | |
| 340 *q = std::numeric_limits<TargetType>::min(); | |
| 341 } | |
| 342 else | |
| 343 { | |
| 344 *q = static_cast<TargetType>(boost::math::iround(v)); | |
| 345 } | |
| 346 } | |
| 347 } | |
| 348 } | |
| 349 | |
| 350 | |
| 31 | 351 ParsedDicomImage::ParsedDicomImage(OrthancPluginContext* context, |
| 352 const std::string& instanceId) : | |
| 353 pimpl_(new PImpl(context, instanceId)) | |
| 0 | 354 { |
| 31 | 355 std::string file = "/instances/" + instanceId + "/file"; |
| 0 | 356 |
| 31 | 357 std::string dicom; |
| 358 if (!GetStringFromOrthanc(dicom, context, file)) | |
| 0 | 359 { |
| 31 | 360 throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource); |
| 0 | 361 } |
| 362 | |
| 31 | 363 pimpl_->Parse(dicom); |
| 0 | 364 } |
| 365 | |
| 366 | |
| 367 bool ParsedDicomImage::GetTag(std::string& result, | |
| 368 uint16_t group, | |
| 369 uint16_t element, | |
| 370 bool stripSpaces) | |
| 371 { | |
| 372 const gdcm::Tag tag(group, element); | |
| 373 | |
| 374 if (pimpl_->GetDataSet().FindDataElement(tag)) | |
| 375 { | |
| 376 const gdcm::ByteValue* value = pimpl_->GetDataSet().GetDataElement(tag).GetByteValue(); | |
| 377 if (value) | |
| 378 { | |
| 379 result = std::string(value->GetPointer(), value->GetLength()); | |
| 380 | |
| 381 if (stripSpaces) | |
| 382 { | |
| 383 result = Orthanc::Toolbox::StripSpaces(result); | |
| 384 } | |
| 385 | |
| 386 return true; | |
| 387 } | |
| 388 } | |
| 389 | |
| 390 return false; | |
| 391 } | |
| 392 | |
| 393 | |
| 394 bool ParsedDicomImage::GetCornerstoneMetadata(Json::Value& json) | |
| 395 { | |
| 396 using namespace Orthanc; | |
| 397 | |
| 398 ImageAccessor accessor; | |
| 31 | 399 if (!pimpl_->GetAccessor(accessor)) |
| 0 | 400 { |
| 401 return false; | |
| 402 } | |
| 403 | |
| 404 float windowCenter, windowWidth; | |
| 405 | |
| 406 switch (accessor.GetFormat()) | |
| 407 { | |
| 408 case PixelFormat_Grayscale8: | |
| 409 case PixelFormat_Grayscale16: | |
| 410 case PixelFormat_SignedGrayscale16: | |
| 411 { | |
| 412 int64_t a, b; | |
| 413 Orthanc::ImageProcessing::GetMinMaxValue(a, b, accessor); | |
| 414 json["minPixelValue"] = (a < 0 ? static_cast<int32_t>(a) : 0); | |
| 415 json["maxPixelValue"] = (b > 0 ? static_cast<int32_t>(b) : 1); | |
| 416 json["color"] = false; | |
| 417 | |
| 418 windowCenter = static_cast<float>(a + b) / 2.0f; | |
| 419 | |
| 420 if (a == b) | |
| 421 { | |
|
1
828c61fc8253
default window width set to 256
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
0
diff
changeset
|
422 windowWidth = 256.0f; // Arbitrary value |
| 0 | 423 } |
| 424 else | |
| 425 { | |
| 426 windowWidth = static_cast<float>(b - a) / 2.0f; | |
| 427 } | |
| 428 | |
| 429 break; | |
| 430 } | |
| 431 | |
| 432 case PixelFormat_RGB24: | |
| 433 json["minPixelValue"] = 0; | |
| 434 json["maxPixelValue"] = 255; | |
| 435 json["color"] = true; | |
| 436 windowCenter = 127.5f; | |
|
1
828c61fc8253
default window width set to 256
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
0
diff
changeset
|
437 windowWidth = 256.0f; |
| 0 | 438 break; |
| 439 | |
| 440 default: | |
| 441 return false; | |
| 442 } | |
| 443 | |
| 444 const gdcm::Image& image = pimpl_->GetImage(); | |
| 445 json["slope"] = image.GetSlope(); | |
| 446 json["intercept"] = image.GetIntercept(); | |
| 447 json["rows"] = image.GetRows(); | |
| 448 json["columns"] = image.GetColumns(); | |
| 449 json["height"] = image.GetRows(); | |
| 450 json["width"] = image.GetColumns(); | |
| 451 json["columnPixelSpacing"] = image.GetSpacing(1); | |
| 452 json["rowPixelSpacing"] = image.GetSpacing(0); | |
| 453 | |
| 454 json["windowCenter"] = windowCenter * image.GetSlope() + image.GetIntercept(); | |
| 455 json["windowWidth"] = windowWidth * image.GetSlope(); | |
| 456 | |
| 457 try | |
| 458 { | |
| 459 std::string width, center; | |
| 460 if (GetTag(center, 0x0028, 0x1050 /*DICOM_TAG_WINDOW_CENTER*/) && | |
| 461 GetTag(width, 0x0028, 0x1051 /*DICOM_TAG_WINDOW_WIDTH*/)) | |
| 462 { | |
| 463 float a = boost::lexical_cast<float>(width); | |
| 464 float b = boost::lexical_cast<float>(center); | |
| 465 json["windowWidth"] = a; | |
| 466 json["windowCenter"] = b; | |
| 467 } | |
| 468 } | |
| 469 catch (boost::bad_lexical_cast&) | |
| 470 { | |
| 471 } | |
| 472 | |
| 473 return true; | |
| 474 } | |
| 475 | |
| 476 | |
| 477 bool ParsedDicomImage::EncodeUsingDeflate(Json::Value& result, | |
| 478 uint8_t compressionLevel /* between 0 and 9 */) | |
| 479 { | |
| 480 using namespace Orthanc; | |
| 481 | |
| 482 ImageAccessor accessor; | |
| 31 | 483 if (!pimpl_->GetAccessor(accessor)) |
| 0 | 484 { |
| 485 return false; | |
| 486 } | |
| 487 | |
| 488 result = Json::objectValue; | |
| 489 result["Orthanc"] = Json::objectValue; | |
| 490 if (!GetCornerstoneMetadata(result)) | |
| 491 { | |
| 492 return false; | |
| 493 } | |
| 494 | |
| 495 ImageBuffer buffer; | |
| 496 buffer.SetMinimalPitchForced(true); | |
| 497 | |
| 498 ImageAccessor converted; | |
| 499 | |
| 500 | |
| 501 switch (accessor.GetFormat()) | |
| 502 { | |
| 503 case Orthanc::PixelFormat_RGB24: | |
| 504 converted = accessor; | |
| 505 break; | |
| 506 | |
| 507 case Orthanc::PixelFormat_Grayscale8: | |
| 508 case Orthanc::PixelFormat_Grayscale16: | |
| 509 buffer.SetFormat(Orthanc::PixelFormat_SignedGrayscale16); | |
| 510 buffer.SetWidth(accessor.GetWidth()); | |
| 511 buffer.SetHeight(accessor.GetHeight()); | |
| 512 converted = buffer.GetAccessor(); | |
| 513 ImageProcessing::Convert(converted, accessor); | |
| 514 break; | |
| 515 | |
| 516 case Orthanc::PixelFormat_SignedGrayscale16: | |
| 517 converted = accessor; | |
| 518 break; | |
| 519 | |
| 520 default: | |
| 521 // Unsupported pixel format | |
| 522 return false; | |
| 523 } | |
| 524 | |
| 525 // Sanity check: The pitch must be minimal | |
| 526 assert(converted.GetSize() == converted.GetWidth() * converted.GetHeight() * | |
| 527 GetBytesPerPixel(converted.GetFormat())); | |
| 528 result["Orthanc"]["Compression"] = "Deflate"; | |
| 529 result["sizeInBytes"] = converted.GetSize(); | |
| 530 | |
| 531 std::string z; | |
| 79 | 532 CompressUsingDeflate(z, pimpl_->GetContext(), converted.GetConstBuffer(), converted.GetSize()); |
| 0 | 533 |
| 534 result["Orthanc"]["PixelData"] = base64_encode(z); | |
| 535 | |
| 536 return true; | |
| 537 } | |
| 538 | |
| 539 | |
| 540 | |
| 541 bool ParsedDicomImage::EncodeUsingJpeg(Json::Value& result, | |
| 542 uint8_t quality /* between 0 and 100 */) | |
| 543 { | |
| 544 using namespace Orthanc; | |
| 545 | |
| 546 ImageAccessor accessor; | |
| 31 | 547 if (!pimpl_->GetAccessor(accessor)) |
| 0 | 548 { |
| 549 return false; | |
| 550 } | |
| 551 | |
| 552 result = Json::objectValue; | |
| 553 result["Orthanc"] = Json::objectValue; | |
| 554 GetCornerstoneMetadata(result); | |
| 555 | |
| 556 ImageBuffer buffer; | |
| 557 buffer.SetMinimalPitchForced(true); | |
| 558 | |
| 559 ImageAccessor converted; | |
| 560 | |
| 561 if (accessor.GetFormat() == Orthanc::PixelFormat_Grayscale8 || | |
| 562 accessor.GetFormat() == Orthanc::PixelFormat_RGB24) | |
| 563 { | |
| 564 result["Orthanc"]["Stretched"] = false; | |
| 565 converted = accessor; | |
| 566 } | |
| 567 else if (accessor.GetFormat() == Orthanc::PixelFormat_Grayscale16 || | |
| 568 accessor.GetFormat() == Orthanc::PixelFormat_SignedGrayscale16) | |
| 569 { | |
| 570 result["Orthanc"]["Stretched"] = true; | |
| 571 buffer.SetFormat(Orthanc::PixelFormat_Grayscale8); | |
| 572 buffer.SetWidth(accessor.GetWidth()); | |
| 573 buffer.SetHeight(accessor.GetHeight()); | |
| 574 converted = buffer.GetAccessor(); | |
| 575 | |
| 576 int64_t a, b; | |
| 577 Orthanc::ImageProcessing::GetMinMaxValue(a, b, accessor); | |
| 578 result["Orthanc"]["StretchLow"] = static_cast<int32_t>(a); | |
| 579 result["Orthanc"]["StretchHigh"] = static_cast<int32_t>(b); | |
| 580 | |
| 581 if (accessor.GetFormat() == Orthanc::PixelFormat_Grayscale16) | |
| 582 { | |
| 583 ChangeDynamics<uint8_t, uint16_t>(converted, accessor, a, 0, b, 255); | |
| 584 } | |
| 585 else | |
| 586 { | |
| 587 ChangeDynamics<uint8_t, int16_t>(converted, accessor, a, 0, b, 255); | |
| 588 } | |
| 589 } | |
| 590 else | |
| 591 { | |
| 592 return false; | |
| 593 } | |
| 594 | |
| 595 result["Orthanc"]["Compression"] = "Jpeg"; | |
| 596 result["sizeInBytes"] = converted.GetSize(); | |
| 597 | |
| 598 std::string jpeg; | |
| 79 | 599 WriteJpegToMemory(jpeg, pimpl_->GetContext(), converted, quality); |
| 600 | |
| 0 | 601 result["Orthanc"]["PixelData"] = base64_encode(jpeg); |
| 602 return true; | |
| 603 } | |
| 26 | 604 } |