Method GetLabelMapping

Modules/Segmentation/src/Interactions/mitkSegWithPreviewTool.cpp:366–426

}

mitk::SegWithPreviewTool::LabelMappingType mitk::SegWithPreviewTool::GetLabelMapping() const
{
  MultiLabelSegmentation::LabelValueType offset = 0;
  
  if (LabelTransferMode::AddLabel == m_LabelTransferMode && LabelTransferScope::ActiveLabel!=m_LabelTransferScope)
  {
    //If we are not just working on active label and transfer mode is add, we need to compute an offset for adding the
    //preview labels instat of just mapping them to existing segmentation labels.
    const auto segmentation = this->GetTargetSegmentation();
    if (nullptr == segmentation)
      mitkThrow() << "Invalid state of SegWithPreviewTool. Cannot GetLabelMapping if no target segmentation is set.";

    auto labels = segmentation->GetLabels();
    auto maxLabelIter = std::max_element(std::begin(labels), std::end(labels), [](const Label::Pointer& a, const Label::Pointer& b) {
      return a->GetValue() < b->GetValue();
    });

    if (maxLabelIter != labels.end())
    {
      offset = maxLabelIter->GetPointer()->GetValue();
    }
  }

  LabelMappingType labelMapping = {};

  switch (this->m_LabelTransferScope)
  {
    case LabelTransferScope::SelectedLabels:
      {
        for (auto label : this->m_SelectedLabels)
        {
          labelMapping.push_back({label, label + offset});
        }
      }
      break;
    case LabelTransferScope::AllLabels:
      {
        const auto labelValues = this->GetPreviewSegmentation()->GetLabelValuesByGroup(this->GetPreviewSegmentation()->GetActiveLayer());
        for (auto labelValue : labelValues)
        {
        labelMapping.push_back({ labelValue, labelValue + offset});
        }
      }
      break;
    default:
      {
        if (m_SelectedLabels.empty())
          mitkThrow() << "Failed to generate label transfer mapping. Tool is in an invalid state, as "
                         "LabelTransferScope==ActiveLabel but no label is indicated as selected label. Check "
                         "implementation of derived tool class.";
        if (m_SelectedLabels.size() > 1)
        mitkThrow() << "Failed to generate label transfer mapping. Tool is in an invalid state, as "
                       "LabelTransferScope==ActiveLabel but more then one selected label is indicated."
                       "Should be only one. Check implementation of derived tool class.";
        labelMapping.push_back({m_SelectedLabels.front(), this->GetUserDefinedActiveLabel()});
      }
      break;
  }