C++ Pointer::IsNull方法代码示例

void mitk::SurfaceInterpolationController::SetCurrentInterpolationSession(mitk::Image::Pointer currentSegmentationImage)
{
  if (currentSegmentationImage.GetPointer() == m_SelectedSegmentation)
    return;

  if (currentSegmentationImage.IsNull())
  {
    m_SelectedSegmentation = nullptr;
    return;
  }

  m_SelectedSegmentation = currentSegmentationImage.GetPointer();

  auto it = m_ListOfInterpolationSessions.find(currentSegmentationImage.GetPointer());
  // If the session does not exist yet create a new ContourPositionPairList otherwise reinitialize the interpolation pipeline
  if (it == m_ListOfInterpolationSessions.end())
  {
    ContourPositionInformationVec2D newList;
    m_ListOfInterpolationSessions.insert(std::pair<mitk::Image*, ContourPositionInformationVec2D>(m_SelectedSegmentation, newList));
    m_InterpolationResult = nullptr;
    m_CurrentNumberOfReducedContours = 0;

    itk::MemberCommand<SurfaceInterpolationController>::Pointer command = itk::MemberCommand<SurfaceInterpolationController>::New();
    command->SetCallbackFunction(this, &SurfaceInterpolationController::OnSegmentationDeleted);
    m_SegmentationObserverTags.insert( std::pair<mitk::Image*, unsigned long>( m_SelectedSegmentation, m_SelectedSegmentation->AddObserver( itk::DeleteEvent(), command ) ) );
  }

  this->ReinitializeInterpolation();
}

void mitk::USTelemedImageSource::GetNextRawImage( mitk::Image::Pointer& image)
{
  if ( image.IsNull() ) { image = mitk::Image::New(); }

  //get the actual resolution to check if it changed. We have to do this every time because the geometry takes a few frames to adapt
  Usgfw2Lib::tagImageResolution resolutionInMetersActual;
  m_ImageProperties->GetResolution(&resolutionInMetersActual, 0);
  if (m_OldnXPelsPerUnit != resolutionInMetersActual.nXPelsPerUnit || m_OldnYPelsPerUnit != resolutionInMetersActual.nYPelsPerUnit)
    {
      //we can only update if the image exists and has a geometry
      if (m_Image.IsNotNull() && m_Image->GetGeometry() != nullptr)
     {
        m_OldnXPelsPerUnit = resolutionInMetersActual.nXPelsPerUnit;
        m_OldnYPelsPerUnit = resolutionInMetersActual.nYPelsPerUnit;
        UpdateImageGeometry();
      }

    }
  //now update image
  if ( m_Image->IsInitialized() )
  {
    m_ImageMutex->Lock();

    // copy contents of the given image into the member variable
    image->Initialize(m_Image->GetPixelType(), m_Image->GetDimension(), m_Image->GetDimensions());
    mitk::ImageReadAccessor inputReadAccessor(m_Image, m_Image->GetSliceData(0,0,0));
    image->SetSlice(inputReadAccessor.GetData());
    image->SetGeometry(m_Image->GetGeometry());

    m_ImageMutex->Unlock();
  }

}

void mitk::SurfaceInterpolationController::SetCurrentInterpolationSession(mitk::Image::Pointer currentSegmentationImage)
{
  if (currentSegmentationImage.GetPointer() == m_SelectedSegmentation)
    return;

  m_ReduceFilter->Reset();
  m_NormalsFilter->Reset();
  m_InterpolateSurfaceFilter->Reset();

  if (currentSegmentationImage.IsNull())
  {
    m_SelectedSegmentation = 0;
    return;
  }
  ContourListMap::iterator it = m_ListOfInterpolationSessions.find(currentSegmentationImage.GetPointer());

  m_SelectedSegmentation = currentSegmentationImage.GetPointer();

  itk::ImageBase<3>::Pointer itkImage = itk::ImageBase<3>::New();
  AccessFixedDimensionByItk_1( m_SelectedSegmentation, GetImageBase, 3, itkImage );
  m_InterpolateSurfaceFilter->SetReferenceImage( itkImage.GetPointer() );

  if (it == m_ListOfInterpolationSessions.end())
  {
    ContourPositionPairList newList;
    m_ListOfInterpolationSessions.insert(std::pair<mitk::Image*, ContourPositionPairList>(m_SelectedSegmentation, newList));
    m_InterpolationResult = 0;
    m_CurrentNumberOfReducedContours = 0;

    itk::MemberCommand<SurfaceInterpolationController>::Pointer command = itk::MemberCommand<SurfaceInterpolationController>::New();
    command->SetCallbackFunction(this, &SurfaceInterpolationController::OnSegmentationDeleted);
    m_SegmentationObserverTags.insert( std::pair<mitk::Image*, unsigned long>( m_SelectedSegmentation, m_SelectedSegmentation->AddObserver( itk::DeleteEvent(), command ) ) );

  }
  else
  {
    for (unsigned int i = 0; i < m_ListOfInterpolationSessions[m_SelectedSegmentation].size(); i++)
    {
      m_ReduceFilter->SetInput(i, m_ListOfInterpolationSessions[m_SelectedSegmentation].at(i).contour);
    }

    m_ReduceFilter->Update();

    m_CurrentNumberOfReducedContours = m_ReduceFilter->GetNumberOfOutputs();

    for (unsigned int i = 0; i < m_CurrentNumberOfReducedContours; i++)
    {
      m_NormalsFilter->SetInput(i, m_ReduceFilter->GetOutput(i));
      m_InterpolateSurfaceFilter->SetInput(i, m_NormalsFilter->GetOutput(i));
    }
  }
  Modified();
}

void mitk::DiffusionImageCreationFilter::SetReferenceImage( mitk::Image::Pointer reference_image )
{
  if( reference_image.IsNull() )
  {
    mitkThrow() << "Null-pointer image provided as reference. ";
  }

  if( ! DPH::IsDiffusionWeightedImage(reference_image) )
  {
    mitkThrow() << "The image provided as reference is not a diffusion-weighted image. Cannot proceed. ";
  }

  this->m_ReferenceImage = reference_image;
}

mitk::pa::Volume::Volume(mitk::Image::Pointer image)
{
  MITK_INFO << "Initialized by mitk::Image";

  if (image.IsNull())
    mitkThrow() << "You may not initialize a mitk::Volume with a null reference to an mitk image";

  unsigned int* dimensions = image->GetDimensions();
  m_YDim = dimensions[0];
  m_XDim = dimensions[1];
  m_ZDim = dimensions[2];

  m_InternalMitkImage = image;

  m_FastAccessDataPointer = GetData();
}