Method DoRead

Modules/Multilabel/autoload/IO/mitkLegacyLabelSetImageIO.cpp:129–252

  }

  std::vector<BaseData::Pointer> LegacyLabelSetImageIO::DoRead()
  {
    itk::NrrdImageIO::Pointer nrrdImageIO = itk::NrrdImageIO::New();

    std::vector<BaseData::Pointer> result;

    auto rawimage = ItkImageIO::LoadRawMitkImageFromImageIO(nrrdImageIO, this->GetLocalFileName());

    const itk::MetaDataDictionary& dictionary = nrrdImageIO->GetMetaDataDictionary();

    std::vector<Image::Pointer> groupImages = { rawimage };
    if (rawimage->GetChannelDescriptor().GetPixelType().GetPixelType() == itk::IOPixelEnum::VECTOR)
    {
      groupImages = SplitVectorImage(rawimage);
    }

    auto labelsets = ExtractLabelSetsFromMetaData(dictionary);

    if (labelsets.size() != groupImages.size())
    {
      mitkThrow() << "Loaded data is in an invalid state. Number of extracted layer images and labels sets does not match. Found layer images: " << groupImages.size() << "; found labelsets: " << labelsets.size();
    }

    auto props = ItkImageIO::ExtractMetaDataAsPropertyList(nrrdImageIO->GetMetaDataDictionary(), this->GetMimeType()->GetName(), this->m_DefaultMetaDataKeys);

    const Options userOptions = this->GetOptions();

    const auto multiLayerStrategy = userOptions.find(OPTION_NAME_MULTI_LAYER)->second.ToString();

    if (multiLayerStrategy == OPTION_NAME_MULTI_LAYER_SPLIT)
    { //just split layers in different multi label images
      auto labelSetIterator = labelsets.begin();
      for (auto image : groupImages)
      {
        auto output = ConvertImageToLabelSetImage(image);
        output->ReplaceGroupLabels(0, *labelSetIterator);

        //meta data handling
        for (auto& [name, prop] : *(props->GetMap()))
        {
          output->SetProperty(name, prop->Clone()); //need to clone to avoid that all outputs pointing to the same prop instances.
        }
        // Handle UID
        //Remark if we split the legacy label set into distinct layer images, the outputs should have new IDs. So we don't get the old one.

        result.push_back(output.GetPointer());
        labelSetIterator++;
      }
    }
    else
    { //Avoid label id collision.
      MultiLabelSegmentation::LabelValueType maxValue = MultiLabelSegmentation::UNLABELED_VALUE;
      auto imageIterator = groupImages.begin();
      std::vector<mitk::MultiLabelSegmentation::LabelVectorType> adaptedLabelSets;

      for (auto labelset : labelsets)
      {
        const auto setValues = MultiLabelSegmentation::ExtractLabelValuesFromLabelVector(labelset);