Gdcm News

Missing features

• gdcm doesn't read yet JPEG-LS and JPEG2000 encoded files.
• Allow user to tell gdcm::Document constructor he doesn't want to deal with SeqEntry Allow user to tell gdcm::Document constructor he doesn't want to deal with Shadow groups
• Allow user to tell gdcm::Document constructor he just wants to load a given list of DocEntries (to save CPU time and RAM space)
• Allow user to tell the Writer he doesn't want to write down SeqEntry (if any)
• Allow user to tell the Writer he doesn't want to write down Shadow groups (if any)
• Icon Image management (Read and Write)
• DICOMDIR full management (not limited to PATIENT/STUDY/SERIE/IMAGE)
• Allow user to add an Entry to the default entry list, before making a DICOMDIR from a root directory
• DICOMDIR anonymiser (Load and Noload mode)
• 16-bits-LUT full Management
• User friendly management of Rescale Slope and Rescale Intercept
• Allow parsing the Shadow groups against a user supplied private Dicom Dictionary (pfff!...)
• An accurate SerieHelper

Current Version

• State of the art
  • gdcm UML Class Diagram current version.
• New Features
  • Both vtkgdcmViewer and vtkgdcmViewer2 are available to allow easy displaying of single/multiframe GreyLevel/RGB/PaletteColor images
• Bug fixes
  • The difference between MONOCHROME1 (low values = bright, high values = dark) and MONOCHROME2 (low values = dark, high values = bright) is now taken into account.
    It's no longer up to the user to change the pixels value
  • Writing a 'True Dicom' image after reading an ACR-NEMA image does not request any longer from the user to build up 'manually' the Meta Elements group (0002)
  • Old '24 Bits' ACR-NEMA are now correctly re-written in DICOM mode.
• A.P.I. breaking modifications (since previous version : 1.0)
  • NEVER more API breaking modifications !!!
• Known bugs
• Sample Data
  Get a gzipped tarball of sample data (warning : 185 Megabytes ...)

Version 1.0 (Feb 14 2005)

• State of the art
  • gdcm 1.0 UML Class Diagram version.
  • User Documentation"
  • Developper Documentation"
  • Final check of the jpeg sub-library: all 'classical' jpeg compressed Dicom files can be read
    
  • All the previously gdcm-breaker images are now readable
    
  • A huge number of memory leaks removed
  • Improvement of write process
• A.P.I. breaking modifications (since previous version : 0.6)
  • Use of namespace : all the methods formerly named className::gdcmXxx() are now named className::Xxx()
    End user will have to call them as gdcm::className::Xxx()
  • a gdcm::Document is now specialized in :
    • gdcm::DicomDir
    • gdcm::File
  • a gdcm::DicomElementSet is composed of a set of gdcm::DicomDocEntry
  • a gdcm::DicomDocEntry can be :
    • a gdcm::ContentEntry, specialized in :
      • gdcm::ValEntry
      • gdcm::BinEntry (no longer a specialization of gdcm::ValEntry)
    • a gdcm::SeqEntry
  • Removal of useless accessors GetXxxByname, SetXxxByname
  • Renaming of accessors GetXxxByNumber, SetXxxByNumber as follow :
    • GetEntryByNumber       --> GetEntryValue
    • GetEntryLengthByNumber --> GetEntryLength
    • GetEntryOffsetByNumber --> GetEntryOffset
    • GetEntryVRByNumber     --> GetEntryVR
    • GetDocEntryByNumber    --> GetDocEntry
    • GetValEntryByNumber    --> GetValEntry
    • GetBinEntryByNumber    --> GetBinEntry
    • GetSeqEntryByNumber    --> GetSeqEntry

Version 0.6 (June 8 2004)

This version will be used by Insight Tool Kit (ITK 2.0) at the beginning of 2005.
It's not yet packaged ...


• User Documentation"
• Developper Documentation"
• The new gdcmDocument class is a parent class of gdcmHeader class and gdcmDicomDir class.
• Massive modifications in the Class Diagram :
  • any dicom related file is a gdcmDocument
  • a gdcmDocument can be :
    • a gdcmHeader, if it contains pixel data
    • a gdcmDicomDir, if it contains only informations on the files in a given directory
  • a gdcmDocument is_a gdcmElementSet, composed of a set of gdcmEntry separated into :
    • gdcmValEntry
      a specialization of gdcmValEntry, for 'non std::string representable' values is gdcmBinEntry
    • gdcmSeqEntry (VR = SQ, i.e Dicom Sequences)
      they are dealt as tree-like structures :
      - a gdcmSeqEntry is considered as a set of gdcmSQItem,
      - a gdcmSQItem is_a gdcmElementSet, composed of gdcmDocEntries, recursively
      
• Improvement of the jpeg sub-library: jpeg compressed Dicom files (lossless and lossy) might be read (check-it out)

Version 0.4 (February 6 2004)

• gdcm 0.4 UML Class Diagram.
• User Documentation"
• Developper Documentation
• Introduction of a jpeg sub-library: some very simple jpeg-lossy compressed Dicom files might be working (check-it out).
• And also, fewer memory leaks, cleaned-up stl usage (should work with gcc-3.x), python disutil installer (see file setup.py) supporting both Swig and vtk wrapping.
• Introduction of a RLE (Run-Time Encoding) library
• Color images (RGB or Palette Color) are dealt with
• Confusing names gdcmPatient, gdcmStudy, gdcmSerie, gdcmPatient changed to gdcmDicomDirPatient, gdcmDicomDirStudy, gdcmDicomDirSerie, gdcmDicomDirPatient

Version 0.3 (July 8 2003)

• gdcmFile class now enables acces to the data i.e. the image[s] content. Previously only parsing of the Dicom header was available through usage of gdcmHeader class.
• a VTK plugin of gdcm is now available through the vtkGdcmReader vtk class (see it as a vtk wrapper of gdcm), which enables
  • Loading of a single image,
  • Loading of a stack of images from multiple Dicom files,
  • this class is wrapped for vtkPython (by using native vtk wrappers).
• Introduction of a jpeg sub-library: lossless-jpeg compressed Dicom files work.
• vtkgdcmViewer allows easy displaying of single/multiframe GreyLevel/RGB/PaletteColor images

Version 0.1 (April 1 2003)

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Version 0.0 (March 14 2003)

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