Mercurial > hg > orthanc
comparison OrthancFramework/Sources/DicomFormat/DicomImageInformation.cpp @ 5323:138e9d0c08c1
added DicomMap::GuessPixelDataValueRepresentation()
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Sun, 25 Jun 2023 12:29:39 +0200 |
| parents | 0ea402b4d901 |
| children | 1c6708a0e0c6 |
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| 5322:a904a4caf5b7 | 5323:138e9d0c08c1 |
|---|---|
| 421 | 421 |
| 422 unsigned int DicomImageInformation::GetUsefulTagLength() | 422 unsigned int DicomImageInformation::GetUsefulTagLength() |
| 423 { | 423 { |
| 424 return 256; | 424 return 256; |
| 425 } | 425 } |
| 426 | |
| 427 | |
| 428 ValueRepresentation DicomImageInformation::GuessPixelDataValueRepresentation(const DicomTransferSyntax& transferSyntax, | |
| 429 unsigned int bitsAllocated) | |
| 430 { | |
| 431 /** | |
| 432 * This approach is validated in "Tests/GuessPixelDataVR.py": | |
| 433 * https://hg.orthanc-server.com/orthanc-tests/file/tip/Tests/GuessPixelDataVR.py | |
| 434 **/ | |
| 435 | |
| 436 if (transferSyntax == DicomTransferSyntax_LittleEndianExplicit || | |
| 437 transferSyntax == DicomTransferSyntax_BigEndianExplicit) | |
| 438 { | |
| 439 /** | |
| 440 * Same rules apply to Little Endian Explicit and Big Endian | |
| 441 * Explicit (now retired). The VR of the pixel data directly | |
| 442 * depends upon the "Bits Allocated (0028,0100)" tag: | |
| 443 * https://dicom.nema.org/medical/dicom/current/output/chtml/part05/sect_A.2.html | |
| 444 * https://dicom.nema.org/medical/dicom/2016b/output/chtml/part05/sect_A.3.html | |
| 445 **/ | |
| 446 if (bitsAllocated > 8) | |
| 447 { | |
| 448 return ValueRepresentation_OtherWord; | |
| 449 } | |
| 450 else | |
| 451 { | |
| 452 return ValueRepresentation_OtherByte; | |
| 453 } | |
| 454 } | |
| 455 else if (transferSyntax == DicomTransferSyntax_LittleEndianImplicit) | |
| 456 { | |
| 457 // Assume "OW" for DICOM Implicit VR Little Endian Transfer Syntax | |
| 458 // https://dicom.nema.org/medical/dicom/current/output/chtml/part05/chapter_A.html#sect_A.1 | |
| 459 return ValueRepresentation_OtherWord; | |
| 460 } | |
| 461 else | |
| 462 { | |
| 463 // Assume "OB" for all the compressed transfer syntaxes | |
| 464 // https://dicom.nema.org/medical/dicom/current/output/chtml/part05/sect_A.4.html | |
| 465 return ValueRepresentation_OtherByte; | |
| 466 } | |
| 467 } | |
| 426 } | 468 } |